| R graph | A32YCK4A34 | unknown | open | Wikidata Q131369360, House of Graphs 342, MathWorld RGraph |
| R-parity | 1XMGWQT64N | unknown | open | Wikidata Q866456, nLab R-parity |
| R-symmetry | NM9P32KKYT | unknown | open | Wikidata Q3928107, nLab R-symmetry |
| R. G. Collingwood | WJB2QNRVGC | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q317075, nLab Robin Collingwood |
| R/r | 5FS29PS71E | unknown | out_of_scope (a notation: the notation register holds it (corpus spec K10.4)) | Wikidata Q9852, ProofWiki Symbols:R |
| R3AKX737A2 | R3AKX737A2 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q6237023, nLab John Palmieri |
| Raabe's test | Q7GRNNKMA2 | statement | open | Wikidata Q1789463, MathWorld RaabesTest |
| rabbit–duck illusion | QZWV58AFCH | unknown | open | Wikidata Q2936146, MathWorld Rabbit-DuckIllusion |
| Racah polynomials | DWBVB310GX | unknown | open | Wikidata Q3907354, MathWorld RacahPolynomial |
| Racah W-coefficient | C7YZBT2HF2 | concept | open | Wikidata Q7278838, MathWorld RacahW-Coefficient |
| Radha Jagadeesan | CTWN7VM47W | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q93947037, nLab Radha Jagadeesan |
| Radial function | 191GXQSZY2 | concept | open | Wikidata Q7280269, MathWorld RadialFunction |
| radial line | GQDDVZA839 | unknown | open | Wikidata Q7280270, MathWorld RadialLine |
| radial of a curve | 2SCK88T8MT | unknown | open | Wikidata Q124414582, MathWorld RadialCurve |
| radial set | V6NF5VAAPS | unknown | open | Wikidata Q7280274, nLab radial set |
| radian | YPJXY9EQHF | definition | open | Wikidata Q33680, EoM Radian, MathWorld Radian, ProofWiki Definition:Angle/Unit/Radian |
| radical | V6HYTFV53W | unknown | open | Wikidata Q11536248, EoM Root, MathWorld Radical |
| radical axis | 6EM2VJXA7Z | unknown | open | Wikidata Q2106473, MathWorld RadicalLine |
| radical of a Lie algebra | J5F53K1RPK | unknown | open | Wikidata Q17046402, MathWorld LieAlgebraRadical |
| radical of an ideal | AX4V62550F | unknown | open | Wikidata Q1199022, MathWorld IdealRadical |
| radical of an integer | B1PZMTS3Y7 | unknown | open | Wikidata Q2498974, MathWorld SquarefreePart |
| radium | 40E9W4D1V4 | definition | open | Wikidata Q1128, ProofWiki Definition:Radium |
| radium-226 | NVNHBHDH36 | definition | open | Wikidata Q4387321, ProofWiki Definition:Radium/226 |
| radius | DPPZDZX519 | unknown | open | Wikidata Q173817, EoM Radius, MathWorld Radius |
| radius of convergence | ZNNH6RAVZY | concept | open | Wikidata Q1428097, MathWorld RadiusofConvergence |
| radius of curvature | 7BXNVWKR13 | unknown | open | Wikidata Q1136069, MathWorld RadiusofCurvature |
| radix | V4DCF60E8X | definition | open | Wikidata Q843684, MathWorld Base, ProofWiki Definition:Number_Base |
| radix character | 9D0E8GJF2V | definition | open | Wikidata Q6575377, ProofWiki Definition:Number_Base/Radix_Point |
| radix sort | ZJHGPQM4YE | unknown | open | Wikidata Q830223, MathWorld RadixSort |
| Radon measure | BKWJDY31CN | unknown | open | Wikidata Q2126650, EoM Radon_measure, MathWorld RadonMeasure, nLab Radon measure |
| Radon transform | 4RY3CW8BAX | topic | open | Wikidata Q979829, MathWorld RadonTransform, nLab Radon transform |
| Radon–Nikodym theorem | MZK4FFV87K | statement | open | Wikidata Q1191319, MathWorld Radon-NikodymTheorem, ProofWiki Radon-Nikodym_Theorem |
| RAFAEL LAHOZ-BELTRA | 8NE1966D61 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q57786497, ProofWiki Mathematician:Rafael_Lahoz-Beltra |
| Rafael Sorkin | YERPMCHCCJ | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q7282329, nLab Rafael Sorkin |
| Rahul Pandharipande | R8BRMDA6QT | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q7283611, nLab Rahul Pandharipande |
| Rainer M. Vogt | 64RGPWGKM9 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q63218089, nLab Rainer Vogt |
| raising and lowering indices | Y75498W8Q4 | concept | open | Wikidata Q2436203, MathWorld IndexLowering, MathWorld IndexRaising |
| Raj Chandra Bose | 9N9MZ39GK8 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q737968, MathWorld EulersGraeco-RomanSquaresConjecture |
| Rajesh Gopakumar | MTZJQQ7YJN | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q7286054, nLab Rajesh Gopakumar |
| Ralph Abraham | DT47FWDPFN | unknown | open | Wikidata Q20759625, nLab Ralph Abraham |
| Ralph Fox | P4A416SR8M | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1405367, nLab Ralph Fox |
| Ralph Kaufmann | P87RXP892Q | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q47545545, nLab Ralph Kaufmann |
| Ramamurti Shankar | 1GJS9VESZF | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q2129979, nLab Ramamurti Shankar |
| Raman Sundrum | KT7760YHGF | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q2912378, nLab Raman Sundrum |
| Ramanujan prime | 2XXSCER167 | concept | open | Wikidata Q3044802, MathWorld RamanujanPrime |
| Ramanujan psi sum | DGARXXHJ5K | unknown | open | Wikidata Q110067857, MathWorld RamanujanPsiSum |
| Ramanujan theta function | 5ZY7H61GT3 | concept | open | Wikidata Q2630765, MathWorld RamanujanThetaFunctions |
| Ramanujan's constant | HHRHBDP5HJ | concept | open | Wikidata Q12815866, MathWorld RamanujanConstant, OEIS A060295 |
| Ramanujan's sum | SJPT87GVF3 | concept | open | Wikidata Q1441456, MathWorld RamanujansSum |
| Ramanujan–Nagell equation | Y8PR4M6WFM | statement | open | Wikidata Q1914905, MathWorld RamanujansSquareEquation, ProofWiki Definition:Ramanujan-Nagell_Equation |
| Ramanujan–Petersson conjecture | 75EVCGBQ7K | concept | open | Wikidata Q630650, MathWorld TauConjecture |
| Ramanujan–Soldner constant | TSCWQS0TT7 | unknown | open | Wikidata Q691109, MathWorld SoldnersConstant, OEIS A070769 |
| Rami Grossberg | EJWN8RTM4B | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q7289523, nLab Rami Grossberg |
| Ramond–Ramond field | 795MHBMRB6 | unknown | open | Wikidata Q5365385, nLab RR field |
| ramp function | 4HT67RZVDJ | unknown | open | Wikidata Q1047481, MathWorld RampFunction |
| Ramsey number | ZYDQ90S37W | unknown | open | Wikidata Q16424100, EoM Ramsey_number, MathWorld RamseyNumber |
| Ramsey theory | F5MZZBVWND | topic | open | Wikidata Q1336170, MathWorld RamseyTheory, ProofWiki Definition:Ramsey_Theory |
| Ramsey's theorem | PH65Q5VQCQ | statement | open | Wikidata Q918099, EoM Ramsey_theorem, MathWorld RamseysTheorem |
| Ramzi R. Khuri | 4S3Q6BAPHY | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q84033368, nLab Ramzi Khuri |
| Ran space | GF2H735WKX | unknown | open | Wikidata Q17144166, nLab Ran space |
| Randall–Sundrum model | ZEABBGQQQS | unknown | open | Wikidata Q1135677, nLab Randall-Sundrum model |
| Randić's molecular connectivity index | Q8DAK516Q2 | unknown | open | Wikidata Q4200698, MathWorld RandicIndex |
| random close pack | PSPG9B9C6P | concept | open | Wikidata Q3796745, MathWorld RandomClosePacking |
| random cluster model | 1YJSJN7D53 | unknown | open | Wikidata Q65067094, MathWorld Random-ClusterModel |
| random Fibonacci sequence | KA2CJ4EJFA | concept | open | Wikidata Q3695425, MathWorld RandomFibonacciSequence |
| random field | Q3P67YN7QE | topic | open | Wikidata Q5361768 |
| random graph | 4TXRDRMB4X | unknown | open | Wikidata Q910404, MathWorld RandomGraph |
| random matrix | R18A630E79 | unknown | open | Wikidata Q176604, MathWorld RandomMatrix, nLab random matrix |
| random number | MADAADAGAG | unknown | open | Wikidata Q1823781, MathWorld RandomNumber |
| random permutation | SE773JZ0TY | unknown | open | Wikidata Q3375503, MathWorld RandomPermutation |
| random sequence | 411XGMMJRQ | unknown | open | Wikidata Q228191, EoM Random_sequence |
| random variable | 7S5969T1EZ | definition | open | Wikidata Q176623, MathWorld RandomVariable, nLab random variable, ProofWiki Definition:Random_Variable, Wikidata Q3179949 |
| random walk | JG97DZ36TR | unknown | open | Wikidata Q856741, MathWorld RandomWalk |
| range | KBEG4PHXMV | unknown | open | Wikidata Q1165839, MathWorld StatisticalRange |
| range of a function | JY6E4J1C7D | unknown | open | Wikidata Q1806121, MathWorld Range |
| rank | ZNEFGKG9E7 | unknown | open | Wikidata Q656784, MathWorld MatrixRank |
| rank of a Lie algebra | AK4JHD8JN2 | unknown | open | Wikidata Q3930077, EoM Rank_of_a_Lie_algebra |
| rank statistic | G14DY92W4V | concept | open | Wikidata Q64767753, EoM Rank_statistic |
| Rankine scale | 1BT12N2KDK | definition | open | Wikidata Q207488, ProofWiki Definition:Rankine |
| Rankin–Selberg method | Z32A6G9PM3 | concept | open | Wikidata Q7293308, nLab Rankin-Selberg method |
| rank–nullity theorem | 86ZCAEE63N | statement | open | Wikidata Q303402, MathWorld Rank-NullityTheorem |
| Raoul Bott | FZH424DV7H | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q441185, nLab Raoul Bott |
| Raphael Bousso | GQ1Q9S83M8 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q7293943, nLab Raphael Bousso |
| Raphael Flauger | 5RMY2VBJHD | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q22669803, nLab Raphael Flauger |
| Raphaël Rouquier | 3WARR4NY0M | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q513377, nLab Raphaël Rouquier |
| Raphaël Salem | M1MR1WJ6FE | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1398969, ProofWiki Mathematician:Raphaël_Salem |
| rapidity | 35DRZNN66J | unknown | open | Wikidata Q1366833, nLab rapidity |
| rascal triangle | C98PYSMB8Z | object | open | Wikidata Q125895638, OEIS A077028 |
| ratio | BBXSKZJACY | unknown | open | Wikidata Q3481047, MathWorld Ratio, nLab ratio |
| ratio distribution | 5ADF72EGAK | unknown | open | Wikidata Q7295737, MathWorld RatioDistribution |
| ratio test | 3K9HKFT33G | concept | open | Wikidata Q165638, MathWorld RatioTest, ProofWiki Ratio_Test |
| rational conformal field theory | WDDNK5MAYF | unknown | open | Wikidata Q7295756, nLab rational 2d conformal field theory |
| rational function | 8XWVYBF4JG | unknown | open | Wikidata Q41237, MathWorld RationalFunction, nLab rational function |
| rational mapping | J41R836WF4 | topic | open | Wikidata Q987226 |
| rational number | F50QDNYS9F | definition | open | Wikidata Q1244890, EoM Rational_number, MathWorld RationalNumber, ProofWiki Definition:Rational_Number |
| rational point | NRCZX81QDG | unknown | open | Wikidata Q3393476, MathWorld RationalPoint, nLab rational point |
| rational polynomial | MCYH01ZJSR | unknown | open | Wikidata Q141150061, MathWorld RationalPolynomial |
| rational root theorem | B7FTCFYY25 | statement | open | Wikidata Q180345, MathWorld RationalZeroTheorem |
| rational surface | FJJ5DVNZJ2 | unknown | open | Wikidata Q208756, EoM Rational_surface |
| rational thermodynamics | HK3ABNGVAZ | unknown | open | Wikidata Q55631208, nLab rational thermodynamics |
| rational variety | WY4NBS08R4 | unknown | open | Wikidata Q3554829, EoM Rational_variety, nLab rational variety |
| raven paradox | HK9HV6VX4E | unknown | open | Wikidata Q919255, MathWorld HempelsParadox |
| Ravi Vakil | MT9V8XC4DD | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q2133711, nLab Ravi Vakil |
| ray | NAN13JKT6T | unknown | open | Wikidata Q1147832, MathWorld Ray |
| Ray Vanstone | RPXR390EED | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q15434544, nLab Ray Vanstone |
| Rayleigh distribution | H9BAQ3JCSY | unknown | open | Wikidata Q637150, MathWorld RayleighDistribution |
| Raymond Frank Vozzo | WSG56NM2RB | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q102353436, nLab Raymond Vozzo |
| Raymond Smullyan | 32GV0ZQYHD | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q441178, ProofWiki Mathematician:Raymond_Merrill_Smullyan |
| Raymond Stora | XCE41JZWM1 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q201229, nLab Raymond Stora |
| reaction | R11GZSPWD1 | definition | open | Wikidata Q343546, ProofWiki Definition:Opposite_Force |
| real analysis | Q0H21WYZFM | topic | open | Wikidata Q854531, MathWorld RealAnalysis, ProofWiki Definition:Analysis/Real |
| real analytic function | EMS2SYP5ZS | unknown | open | Wikidata Q120153213, EoM Real_analytic_function, MathWorld RealAnalyticFunction |
| real closed field | D4TPXZZKYE | unknown | open | Wikidata Q2068227, nLab real closed field |
| real form | YGTRSKBDJR | unknown | open | Wikidata Q7301156, nLab real form |
| real line | KXWNE3H1N0 | unknown | open | Wikidata Q29654355, MathWorld RealLine, Wikidata Q35689 |
| real matrix | R096S05HJ4 | unknown | open | Wikidata Q43144903, MathWorld RealMatrix |
| real number | QA2JPE0Q4Q | concept | open | Wikidata Q12916, EoM Real_number, Mathlib Real, MathWorld RealNumber, nLab real number, ProofWiki Definition:Real_Number, Wikidata Q2584477 |
| real part | 7H3EJB8NR7 | definition | open | Wikidata Q1156910, MathWorld RealPart, nLab real part, ProofWiki Definition:Complex_Number/Real_Part |
| real polynomial | 4HM1ZY4XZW | unknown | open | Wikidata Q120493775, MathWorld RealPolynomial |
| real projective line | NZS7WXRZGN | unknown | open | Wikidata Q23937546, EoM Projective_straight_line |
| real projective plane | F7PM6WCW7G | unknown | open | Wikidata Q633815, MathWorld RealProjectivePlane |
| real projective space | CEMZ7W15G0 | definition | open | Wikidata Q2597317, MathWorld RealProjectiveSpace, nLab real projective space, ProofWiki Definition:Projective_Space/Real_Projective_Space |
| real root | PTZRKG46V6 | unknown | open | Wikidata Q141332768, MathWorld RealRoot |
| real sign function | MACGEY4P0D | unknown | open | Wikidata Q105356166, MathWorld Sign, nLab sign function, Wikidata Q1193832 |
| real structure | M51N352HT6 | unknown | open | Wikidata Q7301171, nLab real structure |
| real vector bundle | 4FZ0ZEG2S7 | unknown | open | Wikidata Q78351921, MathWorld RealVectorBundle, nLab real vector bundle |
| real vector space | QM8816Q525 | unknown | open | Wikidata Q46996054, MathWorld RealVectorSpace, nLab real vector space |
| real-valued function | VD12BK933M | unknown | open | Wikidata Q5189500, MathWorld RealFunction |
| realizability | XRZPPG5DZ5 | unknown | open | Wikidata Q3454417, nLab realizability |
| Recamán's sequence | XXYVTBGP5F | object | open | Wikidata Q16522517, OEIS A005132 |
| Reciprocal difference | 6RRXA30HDC | concept | open | Wikidata Q7302462, MathWorld ReciprocalDifference |
| reciprocal Fibonacci constant | TKVYFCAV42 | object | open | Wikidata Q3772671, MathWorld ReciprocalFibonacciConstant, OEIS A079586, OEIS A079587 |
| reciprocal polynomial | CBT2PMWH6F | unknown | open | Wikidata Q1422356, MathWorld ReciprocalPolynomial |
| Reciprocity theorem | Y5X1CQQZ7Q | concept | open | Wikidata Q9085978, MathWorld ReciprocityTheorem |
| reconstruction conjecture | BNR65BYGS9 | conjecture | open | Wikidata Q7302789, MathWorld UlamsConjecture |
| recreational mathematics | 7FQYX1HWT6 | topic | open | Wikidata Q1410503, ProofWiki Definition:Recreational_Mathematics |
| rectangle | XWNS5ADYYW | unknown | open | Wikidata Q209, MathWorld Rectangle |
| rectangle squaring | FY473TSD0N | concept | open | Wikidata Q1296241, MathWorld RectangleSquaring |
| rectangular cuboid | 9AEZCSCHGE | unknown | open | Wikidata Q262959, MathWorld Cuboid |
| rectangular function | X8BTQGTCM4 | unknown | open | Wikidata Q946860, MathWorld RectangleFunction |
| rectifiable set | EPVG93SR8Q | unknown | open | Wikidata Q3038340, EoM Rectifiable_set, MathWorld RectifiableSet |
| rectification | 4NRQN153W9 | unknown | open | Wikidata Q4967193, MathWorld Rectification |
| rectifying plane | 3QX8W22XY7 | unknown | open | Wikidata Q132321173, MathWorld RectifyingPlane |
| rectilinear crossing number | X6BTR2AWJ7 | unknown | open | Wikidata Q130416686, MathWorld RectilinearCrossingNumber |
| recurrence plot | XDYX37CS3T | unknown | open | Wikidata Q2797953, MathWorld RecurrencePlot |
| recurrence relation | 3CNF1DE7TD | definition | open | Wikidata Q740970, EoM Recurrence_relation, MathWorld RecurrenceEquation, ProofWiki Definition:Recursive_Sequence/Recurrence_Relation |
| recursion | CMCBV2EV4S | unknown | open | Wikidata Q264164, EoM Recursion, MathWorld Recursion |
| recursive sequence | KJ5EPQTYFT | unknown | open | Wikidata Q138568746, MathWorld RecursiveSequence |
| recursive set | ZBPYPPA7TR | unknown | open | Wikidata Q877945, MathWorld RecursiveSet, nLab recursive set |
| recursively enumerable set | MB961CQ657 | unknown | open | Wikidata Q676835, MathWorld RecursivelyEnumerableSet |
| Redheffer matrix | H5RC3ZHTZT | unknown | open | Wikidata Q3851926, MathWorld RedhefferMatrix |
| redshift | XN91ZRSC7S | unknown | open | Wikidata Q76250, nLab redshift |
| reduced homology | TKYJ07ATHH | unknown | open | Wikidata Q7306331, nLab reduced homology |
| reduced Planck constant | 7CPJNMZ4CD | definition | open | Wikidata Q2115969, ProofWiki Definition:Reduced_Planck_Constant |
| reduced residue system | AWWMCWBCZE | unknown | open | Wikidata Q1246629, MathWorld ReducedResidueSystem |
| reduced ring | N13MPBHP5Z | unknown | open | Wikidata Q6423024, nLab reduced ring |
| reduced scheme | RTGDNP4GSV | unknown | open | Wikidata Q123508622, EoM Reduced_scheme, nLab reduced scheme |
| reduced suspension | WEMGWVVF7R | unknown | open | Wikidata Q91791780, nLab reduced suspension |
| reducible fraction | G84BW7732F | unknown | open | Wikidata Q11922681, MathWorld ReducibleFraction |
| reducible matrix | MY7EZGA74B | unknown | open | Wikidata Q119720261, MathWorld ReducibleMatrix |
| reducible representation | SBXB49QBTW | unknown | open | Wikidata Q111797330, nLab reducible representation |
| reducible set | 97F1Q0N2DJ | unknown | open | Wikidata Q141499243, MathWorld Reducible |
| reductio ad absurdum | PAHTJEK1BV | unknown | open | Wikidata Q14402006, MathWorld ReductioadAbsurdum |
| reduction | MJX9D5T7SK | topic | open | Wikidata Q7306360 |
| reduction of order | M9GSY5J7QQ | concept | open | Wikidata Q1430365, MathWorld Second-OrderOrdinaryDifferentialEquationSecondSolution |
| Reduction Operator | 7P5YQQH8AF | topic | open | Wikidata Q30589103 |
| reductive group | WDKJD0BKMN | topic | open | Wikidata Q1006450, nLab reductive group |
| reductive Lie algebra | EAWNXHPPD3 | unknown | open | Wikidata Q7306383, EoM Lie_algebra,_reductive, nLab reductive Lie algebra |
| redundancy | 7W0N4XWZ9J | unknown | open | Wikidata Q122192, MathWorld Redundancy |
| red–black tree | DCQV9DFPT8 | unknown | open | Wikidata Q506496, MathWorld Red-BlackTree |
| Ree group | E4PD02SH5P | concept | open | Wikidata Q7306554, MathWorld ReeGroup |
| Reeb foliation | Q3KZG021RH | unknown | open | Wikidata Q564842, MathWorld ReebFoliation |
| Reeb sphere theorem | C355MXVQ5R | statement | open | Wikidata Q4455016, nLab Reeb sphere theorem |
| Reeds–Sloane algorithm | VYEFSRMMS5 | unknown | open | Wikidata Q7306757, MathWorld Reeds-SloaneAlgorithm |
| Rees algebra | GP5P6E1YCQ | concept | open | Wikidata Q7306976, MathWorld ReesRing |
| Rees matrix semigroup | YD2CH5Y4QE | concept | open | Wikidata Q17099723, nLab Rees matrix semigroup |
| refactorable number | 2AMCV6KNNS | unknown | open | Wikidata Q2063121, MathWorld RefactorableNumber, OEIS A033950 |
| refinement | RJB92MJ41V | definition | open | Wikidata Q119751219, MathWorld Refinement, ProofWiki Definition:Refinement_of_Cover |
| reflection | 8T1WQ6SAEA | unknown | open | Wikidata Q426221, MathWorld Reflection |
| reflection formula | VAQXTN98ZG | unknown | open | Wikidata Q4922429, MathWorld ReflectionRelation |
| reflection group | X58CNC2JME | unknown | open | Wikidata Q7307244, EoM Reflection_group |
| reflection principle | CBBYHP9NPW | unknown | open | Wikidata Q7307249, nLab reflection principle |
| reflection triangle | 5WWXYNSAZP | unknown | open | Wikidata Q2386784, MathWorld ReflectionTriangle |
| reflective subcategory | THXDPC501D | unknown | open | Wikidata Q6101219, nLab reflective subcategory |
| reflex angle | THKDZDMM1V | unknown | open | Wikidata Q10396169, MathWorld ReflexAngle |
| reflexive closure | HVBMT5HKZ9 | unknown | open | Wikidata Q1637549, MathWorld ReflexiveClosure |
| reflexive relation | XRVMSG2RSG | unknown | open | Wikidata Q621850, MathWorld Reflexive |
| reflexive space | T2YYM72GSQ | unknown | open | Wikidata Q2032198, EoM Reflexive_space, MathWorld ReflexiveSpace, nLab reflexive Banach space |
| reflexive transitive closure | Q7SB1P3X81 | definition | open | Wikidata Q93447297, ProofWiki Definition:Reflexive_Transitive_Closure |
| Regge calculus | Z683FQQE2J | concept | open | Wikidata Q1055042, MathWorld ReggeCalculus |
| Regina Tyshkevich | K67JC0J4CT | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q7308550, ProofWiki Mathematician:Regina_Iosifovna_Tyshkevich |
| register machine | P661Y7B9QE | unknown | open | Wikidata Q1930388, MathWorld RegisterMachine |
| regression | 85H8MGBMT8 | unknown | open | Wikidata Q105675274, MathWorld Regression |
| regression toward the mean | 9CMY1ANNHC | unknown | open | Wikidata Q1135405, MathWorld ReversiontotheMean |
| regular cardinal | 9EDF4CAWAZ | definition | open | Wikidata Q1193137, nLab regular cardinal, ProofWiki Definition:Regular_Cardinal |
| regular category | FRR1Z6G3GE | unknown | open | Wikidata Q2844249, nLab regular category |
| regular character | 9XKDH241VR | topic | open | Wikidata Q24964251 |
| regular decagon | M2SJF3P4HV | unknown | open | Wikidata Q18017999, MathWorld RegularDecagon |
| regular dodecagon | RJGRAHV032 | unknown | open | Wikidata Q18018003, MathWorld RegularDodecagon |
| regular dodecahedron | K6AA40ZHMM | definition | open | Wikidata Q16629569, MathWorld RegularDodecahedron, ProofWiki Definition:Dodecahedron/Regular |
| regular expression | J6NXTW8341 | unknown | open | Wikidata Q185612, MathWorld RegularExpression |
| Regular extension | MYNCCX971J | unknown | open | Wikidata Q7309599, nLab regular field extension |
| regular graph | VDSRZGQ5ZF | definition | open | Wikidata Q826467, MathWorld RegularGraph, ProofWiki Definition:Regular_Graph |
| regular hendecagon | GJ7T4C6P55 | unknown | open | Wikidata Q18018002, MathWorld RegularHendecagon |
| regular heptadecagon | ZFFKHQ5AVW | unknown | open | Wikidata Q18018011, MathWorld 17-gon |
| regular heptagon | SE0TAY247X | unknown | open | Wikidata Q18017733, MathWorld RegularHeptagon |
| regular hexagon | FX7WSC3N8H | unknown | open | Wikidata Q4375918, MathWorld RegularHexagon |
| regular homotopy | D6M3GSTFWX | unknown | open | Wikidata Q7309601, nLab regular homotopy |
| regular icosahedron | FC638RNFG4 | definition | open | Wikidata Q18015071, MathWorld RegularIcosahedron, ProofWiki Definition:Icosahedron/Regular |
| regular ideal | PYDVEZRFF7 | unknown | open | Wikidata Q4299465, EoM Modular_ideal |
| regular isotopy | TGCJQFAJ37 | unknown | open | Wikidata Q7309602, MathWorld RegularIsotopy |
| regular local ring | N4VZC76E6P | unknown | open | Wikidata Q2138875, EoM Regular_ring, MathWorld RegularLocalRing, nLab regular local ring |
| regular nonagon | 30GAXDY0YD | unknown | open | Wikidata Q18017976, MathWorld RegularNonagon |
| regular number | NX7PVQ175K | object | open | Wikidata Q1826416, OEIS A051037 |
| regular octagon | M4GNCVEMJN | unknown | open | Wikidata Q16156662, MathWorld RegularOctagon |
| regular octahedron | T642RFNM2R | definition | open | Wikidata Q12557050, EoM Octahedron, MathWorld RegularOctahedron, ProofWiki Definition:Octahedron/Regular |
| regular pentagon | Z67E5KMJ15 | unknown | open | Wikidata Q4375921, MathWorld RegularPentagon |
| regular point | RPR7N3ZNW6 | unknown | open | Wikidata Q77881363, MathWorld RegularPoint |
| regular polygon | W80T5PZHKE | definition | open | Wikidata Q714886, MathWorld RegularPolygon, ProofWiki Definition:Polygon/Regular |
| regular polyhedron | EK366EPSJ0 | definition | open | Wikidata Q735071, MathWorld RegularPolyhedron, nLab regular polyhedron, ProofWiki Definition:Regular_Polyhedron |
| regular polytope | Q4KSZEM3XS | concept | open | Wikidata Q2745944, MathWorld RegularPolytope |
| regular prime | 3NRM89XMKH | concept | open | Wikidata Q426491, MathWorld RegularPrime, OEIS A007703 |
| regular pyramid | CD4R87J85D | unknown | open | Wikidata Q11398888, MathWorld RegularPyramid |
| regular representation | J26NTX53DZ | unknown | open | Wikidata Q1555242, EoM Regular_representation, nLab regular representation |
| regular ring | W8CK4DX62T | unknown | open | Wikidata Q956273, MathWorld RegularRing |
| regular scheme | 9R4QYW13DZ | unknown | open | Wikidata Q18393924, EoM Regular_scheme, nLab regular scheme |
| regular sequence | 9D0R4ETF39 | unknown | open | Wikidata Q7309617, MathWorld RingRegularSequence, nLab regular sequence |
| regular singular point | T1XE82QAKF | unknown | open | Wikidata Q3925845, EoM Regular_singular_point, MathWorld RegularSingularPoint, nLab regular singular point |
| regular space | ZSX9JDW3B0 | definition | open | Wikidata Q1193403, MathWorld RegularSpace, nLab regular space, ProofWiki Definition:T3_Space |
| regular star polygon | XR8JBKA97Q | unknown | open | Wikidata Q836708, MathWorld StarPolygon |
| regular surface | DGYJR5WDN0 | unknown | open | Wikidata Q116846710, MathWorld RegularSurface |
| regular tessellation | X50Z75FXEQ | unknown | open | Wikidata Q18062082, MathWorld RegularTessellation |
| regular tetrahedron | 2C2GZ5R4PP | definition | open | Wikidata Q14918679, MathWorld RegularTetrahedron, ProofWiki Definition:Tetrahedron/Regular |
| regular value | P0EBGRHS6B | unknown | open | Wikidata Q77880977, nLab regular value |
| regularity | X7K7D4EMX7 | topic | open | Wikidata Q4184950 |
| regularization | ZA3KS1MCBZ | topic | open | Wikidata Q17143721 |
| regulator | 9D23J6ECAK | unknown | open | Wikidata Q17591375, EoM Regulator_of_an_algebraic_number_field, MathWorld Regulator, nLab regulator of a number field |
| Regulus | 2Z3PB5711N | unknown | open | Wikidata Q28457674, MathWorld Regulus |
| Reidemeister move | 243MYWJA1M | concept | open | Wikidata Q1636327, MathWorld ReidemeisterMoves, nLab Reidemeister move |
| Reidemeister torsion | K0ATZT2W0J | concept | open | Wikidata Q31839400, MathWorld ReidemeisterTorsion |
| Reiko Miyaoka | ZGAK6CHY1F | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q11454088, nLab Reiko Miyaoka |
| Reinhardt domain | HSV9H26942 | concept | open | Wikidata Q7310358, EoM Reinhardt_domain, MathWorld ReinhardtDomain |
| Reinhold Baer | YX1JFWDMG9 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q78085, nLab Reinhold Baer |
| Reinhold Remmert | J99Y123K8N | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q73009, nLab Reinhold Remmert |
| related rates | CY74CGX7SV | unknown | open | Wikidata Q12244048, MathWorld RelatedRatesProblem |
| relational calculus | NK3YMF1EJH | unknown | open | Wikidata Q1722436, nLab relational calculus |
| relational structure | G3K6JCGE0F | unknown | open | Wikidata Q134487654, nLab relational structure |
| relative dimension | WG6WWV2BEG | unknown | open | Wikidata Q7310789, nLab relative dimension |
| relative error | TFRB2WXQQZ | unknown | open | Wikidata Q12375413, MathWorld RelativeError |
| relative frequency | SCE7JAGF7H | unknown | open | Wikidata Q5374249, MathWorld RelativeFrequency |
| relative homology | SVJ83RQ5FN | unknown | open | Wikidata Q1959911, EoM Relative_homology, nLab relative homology |
| relative velocity | 65EPDD9KN6 | definition | open | Wikidata Q1376323, ProofWiki Definition:Relative_Velocity |
| relatively compact subspace | H0Z704JN0S | unknown | open | Wikidata Q610232, EoM Pre-compact_space, nLab relatively compact subspace |
| relativistic astrophysics | PYRM53K298 | unknown | open | Wikidata Q110609911, EoM Relativistic_astrophysics,_mathematical_problems_in |
| relativistic dynamics | YMA914656F | unknown | open | Wikidata Q7310826, EoM Relativistic_dynamics |
| relativistic mechanics | ZC7PZYPCS8 | definition | open | Wikidata Q4393075, ProofWiki Definition:Relativistic_Mechanics |
| relativistic particle | Y657HRKG4J | unknown | open | Wikidata Q2022629, nLab relativistic particle |
| relativistic thermodynamics | QJ8C8GRFD9 | unknown | open | Wikidata Q100164624, EoM Relativistic_thermodynamics,_mathematical_problems_in |
| relaxation | ZEKJ392VYF | unknown | open | Wikidata Q2311872, MathWorld RelaxationMethods |
| relevance logic | VT1F0PBJ6M | unknown | open | Wikidata Q176630, nLab relevance logic |
| remainder | 1HBPDZPJQT | topic | open | Wikidata Q846677, MathWorld Remainder |
| Remez algorithm | GNVV0SYDES | unknown | open | Wikidata Q2835816, MathWorld RemezAlgorithm |
| removable discontinuity | VQCC3A499V | unknown | open | Wikidata Q77871472, MathWorld RemovableDiscontinuity |
| removable singularity | QF4GJBQK6C | definition | open | Wikidata Q1974087, MathWorld RemovableSingularity, ProofWiki Definition:Removable_Singularity |
| Renata Kallosh | JTDQ7HSJK5 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q529277, nLab Renata Kallosh |
| rencontres numbers | NZVZWM1E11 | concept | open | Wikidata Q1293666, MathWorld PartialDerangement |
| renormalization | 88A3TB4CQE | unknown | open | Wikidata Q1047702, nLab renormalization |
| renormalization group | XDXY24M913 | topic | open | Wikidata Q1203669, nLab renormalization group |
| René Descartes | RPEANHTE4C | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q9191, nLab René Descartes |
| René Thom | T7N9ESH22J | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q164428, nLab René Thom |
| rep-tile | JZXRH5E48H | unknown | open | Wikidata Q3661853, MathWorld Rep-Tile |
| reparameterization | Y50CMVCJDA | concept | open | Wikidata Q105332763, MathWorld Reparameterization |
| repdigit | P0733MZRCS | unknown | open | Wikidata Q1200532, MathWorld Repdigit, OEIS A010785 |
| repeated integral | XVX884YTB6 | concept | open | Wikidata Q116483799, MathWorld RepeatedIntegral |
| repeating decimal | 9TJ8JBBJ2B | unknown | open | Wikidata Q389208, MathWorld RepeatingDecimal |
| representable functor | T28AP9DV3Y | unknown | open | Wikidata Q386320, nLab representable functor |
| representation | 4NQDCPBEMC | topic | open | Wikidata Q2905654 |
| representation ring | 59HXMJV9P5 | unknown | open | Wikidata Q7314220, MathWorld RepresentationRing, nLab representation ring |
| representation theory | ZHKAYQS12K | topic | open | Wikidata Q13220368, EoM Representation_theory, MathWorld RepresentationTheory, ProofWiki Definition:Representation_Theory |
| representative function | KYEJZRG8M4 | unknown | open | Wikidata Q7314250, nLab representative function |
| reproducing kernel Hilbert space | RB0SAXBGHH | unknown | open | Wikidata Q3345678, EoM Reproducing-kernel_Hilbert_space |
| repunit | E52M62SGP9 | unknown | open | Wikidata Q1199125, MathWorld Repunit, OEIS A002275 |
| residue | SXTJC64A2N | concept | open | Wikidata Q753375, MathWorld ComplexResidue, nLab residue, ProofWiki Definition:Residue_(Complex_Analysis) |
| residue class | 9XZD72Y9N4 | definition | open | Wikidata Q68026154, MathWorld ResidueClass, ProofWiki Definition:Residue_Class |
| residue field | GH1PM8A9SN | unknown | open | Wikidata Q7315530, Mathlib IsLocalRing.ResidueField, MathWorld ResidueField, nLab residue field |
| residue theorem | 5B5S1HPW1A | statement | open | Wikidata Q830513, MathWorld ResidueTheorem, ProofWiki Cauchy's_Residue_Theorem |
| resistance distance | G8DQ0609GP | unknown | open | Wikidata Q7315618, MathWorld ResistanceDistance |
| resolution | V07G8KABDF | statement | open | Wikidata Q1051925, MathWorld ResolutionPrinciple |
| resolution of singularities | K024HKY5ZT | unknown | open | Wikidata Q10942247, EoM Resolution_of_singularities |
| resolution of the identity | WQP1WK3TT1 | concept | open | Wikidata Q3937040, EoM Resolution_of_the_identity |
| resolvent cubic | PQQGA6PC7W | unknown | open | Wikidata Q7315718, MathWorld ResolventCubic |
| rest energy | F8FJ4YMG35 | definition | open | Wikidata Q11663629, ProofWiki Definition:Rest-Mass_Energy |
| rest mass | A4J1JZH7Q5 | definition | open | Wikidata Q1097654, ProofWiki Definition:Rest_Mass |
| restricted Lie algebra | A53AC9K78R | unknown | open | Wikidata Q7316293, nLab restricted Lie algebra |
| restricted product | 37346QVXQ3 | unknown | open | Wikidata Q7316304, nLab restricted product |
| restricted representation | C8MVTSPAB1 | unknown | open | Wikidata Q7316307, nLab restricted representation |
| restriction | ETM66721TE | unknown | open | Wikidata Q1308999, nLab restriction |
| restriction of scalars | ZWPXGH6NBJ | unknown | open | Wikidata Q7316320, nLab restriction of scalars |
| resultant | 5YFA41MAFP | unknown | open | Wikidata Q1168321, MathWorld Resultant, nLab resultant |
| resummation | 8TH02R7KCY | unknown | open | Wikidata Q17105514, nLab resummation |
| retract | S6TV4283FW | concept | open | Wikidata Q2141963, EoM Retract_of_a_topological_space, MathWorld Retract, nLab retract |
| retraction | VFJHSJCEA5 | unknown | open | Wikidata Q57605839, MathWorld LeftInverse |
| retrograde analysis | XTEVTWW6G3 | definition | open | Wikidata Q2082711, ProofWiki Definition:Retrograde_Analysis |
| Reuleaux tetrahedron | G891XMVZE3 | unknown | open | Wikidata Q1464647, MathWorld ReuleauxTetrahedron |
| Reuleaux triangle | FQG902PZDS | unknown | open | Wikidata Q959203, MathWorld ReuleauxTriangle |
| Reuschle's theorem | Q68MHZF7X5 | concept | open | Wikidata Q2013213, MathWorld CyclocevianConjugate, Wikidata Q3686997 |
| reverse mathematics | K5KX14K5Y1 | topic | open | Wikidata Q2005236, nLab reverse mathematics |
| reversible computing | XY5J18422K | unknown | open | Wikidata Q185410, nLab reversible computation |
| rewriting | KC6FF639F1 | unknown | open | Wikidata Q1668499, nLab rewriting |
| Reye configuration | RSVVDTGHT9 | concept | open | Wikidata Q17099755, MathWorld ReyeConfiguration |
| Reynolds number | 8AP3CZQQZT | concept | open | Wikidata Q178932, EoM Reynolds_number |
| Reynolds transport theorem | CG82ZT9ZT7 | statement | open | Wikidata Q953062, MathWorld ReynoldsTransportTheorem |
| Rhind Mathematical Papyrus | R8V0G3K5RF | unknown | out_of_scope (a book, not an item of mathematics) | Wikidata Q213540, ProofWiki Book:Ahmes/Rhind_Papyrus |
| rho meson | TWFKTHNMQA | unknown | open | Wikidata Q306428, nLab rho meson |
| rhombic dodecahedral graph | HY9C4SP8ZC | unknown | open | Wikidata Q2376018, House of Graphs 1282, MathWorld RhombicDodecahedralGraph |
| rhombic dodecahedron | PYBRK4ED75 | object | open | Wikidata Q1132285, MathWorld RhombicDodecahedron |
| Rhombic Dodecahedron Stellations | 75DDZ182A0 | unknown | open | Wikidata Q67169233, MathWorld RhombicDodecahedronStellations |
| rhombic enneacontahedron | MJGRX1MS1C | object | open | Wikidata Q4896670, MathWorld RhombicEnneacontahedron |
| rhombic hexecontahedron | C0A2SQ02XB | object | open | Wikidata Q18390248, MathWorld RhombicHexecontahedron |
| Rhombic icosahedron | EN7664ZY0E | concept | open | Wikidata Q3791716, MathWorld RhombicIcosahedron |
| rhombic triacontahedral graph | SWJTMGA96G | unknown | open | Wikidata Q3115608, House of Graphs 1284, MathWorld RhombicTriacontahedralGraph |
| rhombic triacontahedron | XFGCGB0QY9 | object | open | Wikidata Q1141696, MathWorld RhombicTriacontahedron |
| rhombic triacontahedron stellations | 9X4BNZSP19 | object | open | Wikidata Q98446306, MathWorld RhombicTriacontahedronStellations |
| rhombicosacron | 8EBYM6R723 | unknown | open | Wikidata Q7321279, MathWorld Rhombicosacron |
| rhombicosahedron | H0FB2BBDKV | unknown | open | Wikidata Q28992, MathWorld Rhombicosahedron |
| rhombicosidodecahedron | WP5A6KD12Z | object | open | Wikidata Q672521, MathWorld SmallRhombicosidodecahedron |
| rhombicuboctahedron | ZG4WBMHSBH | object | open | Wikidata Q860923, MathWorld SmallRhombicuboctahedron |
| rhombidodecadodecahedron | MAT4HVF6GH | unknown | open | Wikidata Q29067, MathWorld Rhombidodecadodecahedron |
| rhombo-hexagonal dodecahedron | P1H94HA2NC | unknown | open | Wikidata Q3893549, MathWorld Space-FillingPolyhedron |
| rhombohedron | Y87FPHVEZW | unknown | open | Wikidata Q854916, MathWorld Rhombohedron |
| rhomboid | XB6KM41W3A | unknown | open | Wikidata Q10364247, MathWorld Rhomboid |
| rhombus | STZJTKCNXJ | unknown | open | Wikidata Q41159, MathWorld Rhombus |
| rhumb line | F22CPV2999 | unknown | open | Wikidata Q215169, MathWorld Loxodrome |
| ribbon category | TWTQMPHE0K | unknown | open | Wikidata Q17102717, nLab ribbon category |
| ribbon knot | ZCS3PW78W7 | unknown | open | Wikidata Q17102731, MathWorld RibbonKnot |
| Ribet's theorem | AES01TTTJV | statement | open | Wikidata Q7322366, MathWorld RibetsTheorem, nLab Ribet's theorem |
| Ricardo Schiappa | 18M0Y0ZC7Q | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q62058459, nLab Ricardo Schiappa |
| Riccati equation | JZ1JRNDNFN | concept | open | Wikidata Q851503, MathWorld RiccatiDifferentialEquation, nLab Riccati equation, ProofWiki Definition:Riccati_Equation |
| Ricci curvature | HXSAH6S4D9 | unknown | open | Wikidata Q1195879, EoM Ricci_tensor, MathWorld RicciCurvatureTensor, nLab Ricci curvature |
| Ricci flow | KQXFDWZ9KK | concept | open | Wikidata Q1361396, MathWorld RicciFlow, nLab Ricci flow, ProofWiki Definition:Ricci_Flow |
| Rice distribution | 5KWN6G0956 | unknown | open | Wikidata Q2671311, MathWorld RiceDistribution |
| Rice's theorem | QX783ABM12 | statement | open | Wikidata Q1893717, MathWorld RicesTheorem |
| Richard Blute | CARGZHYEY5 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q93944801, nLab Richard Blute |
| Richard Borcherds | 7XWJWZNRXM | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q334010, nLab Richard Borcherds |
| Richard Brauer | VF194PM1XC | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q65201, nLab Richard Brauer |
| Richard Dalitz | S0XQ7YCZEW | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q354856, nLab Richard Dalitz |
| Richard Dedekind | W2BG1Q7P02 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q76556, nLab Richard Dedekind |
| Richard Dien Winfield | RAD28Y0ZD2 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q81749700, nLab Richard Dien Winfield |
| Richard Feynman | WQYZE0KBMX | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q39246, nLab Richard Feynman |
| Richard Hepworth | T5NT75FQC1 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q30140375, nLab Richard Hepworth |
| Richard James Milgram | YQMQGV57V8 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q2123853, nLab R. James Milgram |
| Richard Lashof | BZSCTG562K | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q7327261, nLab Richard Lashof |
| Richard Melrose | FPTJGY6QWA | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q2150196, nLab Richard Melrose |
| Richard Montague | AC5QVD0578 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q536528, nLab Richard Montague |
| Richard P. Brent | 8EA6F16J43 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q93042, ProofWiki Mathematician:Richard_Peirce_Brent |
| Richard Palais | BN6Q0RKFY7 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q2150338, nLab Richard Palais |
| Richard Schoen | MR16DM0DFY | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q455610, nLab Richard Schoen |
| Richard Statman | 81FWW2A07R | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q7329230, nLab Richard Statman |
| Richard Swan | ST6Q3C2DZE | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q371523, nLab Richard Swan |
| Richard Taylor | 5JR42789FD | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q712170, nLab Richard Taylor |
| Richard von Mises | 4H1A472VTR | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q84292, EoM Mises,_Richard_von |
| Richard's paradox | 82AFCQE96B | statement | open | Wikidata Q83491, MathWorld RichardsParadox, ProofWiki Richard's_Paradox |
| Richardson extrapolation | 2DWE0Q03N3 | unknown | open | Wikidata Q1063089, MathWorld RichardsonExtrapolation |
| Richardson's theorem | C65D51S417 | statement | open | Wikidata Q1249069, MathWorld RichardsonsTheorem |
| Ridders' method | KX7RKXB7JG | unknown | open | Wikidata Q1864934, MathWorld RiddersMethod |
| ridge | XM6EGVNXS0 | concept | open | Wikidata Q3895298, MathWorld Ridge |
| Riemann curvature tensor | NS7B64WHJ4 | unknown | open | Wikidata Q855112, MathWorld RiemannTensor, nLab Riemann curvature |
| Riemann hypothesis | N3YJ4KEKYW | problem | open | Wikidata Q205966, EoM Riemann_hypotheses, Mathlib RiemannHypothesis, MathWorld RiemannHypothesis, nLab Riemann hypothesis, nLab Riemann hypothesis and physics, ProofWiki Riemann_Hypothesis |
| Riemann integral | GZYSPJWX85 | concept | open | Wikidata Q697181, EoM Riemann_integral, MathWorld RiemannIntegral |
| Riemann mapping theorem | HV2J29E43S | statement | open | Wikidata Q927051, MathWorld RiemannMappingTheorem |
| Riemann series theorem | 1VKD86MZEN | statement | open | Wikidata Q1752516, MathWorld RiemannSeriesTheorem |
| Riemann sphere | N5CPEK3S76 | unknown | open | Wikidata Q825857, MathWorld RiemannSphere, nLab Riemann sphere |
| Riemann sum | WRE2H0TF6Y | concept | open | Wikidata Q1156903, MathWorld RiemannSum |
| Riemann surface | HFMFPGERY8 | concept | open | Wikidata Q753035, EoM Riemann_surface, MathWorld RiemannSurface, nLab Riemann surface, ProofWiki Definition:Riemann_Surface |
| Riemann theta function | T5BGT6MTMS | concept | open | Wikidata Q120377815, EoM Riemann_theta-function, MathWorld RiemannThetaFunction |
| Riemann von Mangoldt explicit formula | E4K32952V6 | unknown | open | Wikidata Q135471579, MathWorld ExplicitFormula |
| Riemann Xi function | RXVF0PSJR0 | unknown | open | Wikidata Q2152235, MathWorld Xi-Function |
| Riemann zeta function | BNZES6DKKV | concept | open | Wikidata Q187235, EoM Zeta-function#Riemann.27s_zeta-function, Mathlib riemannZeta, MathWorld RiemannZetaFunction, ProofWiki Definition:Riemann_Zeta_Function |
| Riemann's differential equation | AB5F7ZWXG4 | unknown | open | Wikidata Q974071, EoM Papperitz_equation, MathWorld RiemannP-DifferentialEquation |
| Riemannian geometry | 6YW6CM84EV | topic | open | Wikidata Q761383, MathWorld RiemannianGeometry, ProofWiki Definition:Riemannian_Geometry_(Mathematical_Branch) |
| Riemannian manifold | 5167SFZ33R | concept | open | Wikidata Q632814, EoM Riemannian_manifold, MathWorld RiemannianManifold, nLab Riemannian manifold, ProofWiki Definition:Riemannian_Manifold |
| Riemannian metric | VJJDNX6FJX | unknown | open | Wikidata Q7888899, EoM Riemannian_metric, MathWorld RiemannianMetric, nLab Riemannian metric |
| Riemann–Lebesgue lemma | 5HEPQH9KDM | statement | open | Wikidata Q9363284, MathWorld Riemann-LebesgueLemma |
| Riemann–Liouville integral | 73EYDQ91GG | unknown | open | Wikidata Q4162532, MathWorld Riemann-LiouvilleOperator |
| Riemann–Roch theorem | SGWAP6RKVC | statement | open | Wikidata Q379048, ProofWiki Riemann-Roch_Theorem |
| Riemann–Siegel formula | RPX8XJAP9D | statement | open | Wikidata Q3018544, MathWorld Riemann-SiegelFormula |
| Riemann–Siegel theta function | VGPH5P2JY8 | concept | open | Wikidata Q14769928, MathWorld Riemann-SiegelFunctions |
| Riemann–Stieltjes integral | 48VA7DBC0J | unknown | open | Wikidata Q285771, MathWorld StieltjesIntegral |
| Riemann–von Mangoldt formula | JB3D6QZBHD | statement | open | Wikidata Q3748379, MathWorld Riemann-vonMangoldtFormula |
| Riesel number | JK6DQHFR5F | definition | open | Wikidata Q301128, MathWorld RieselNumber, OEIS A101036, ProofWiki Definition:Riesel_Number |
| Riesz representation theorem | C5NT1HQ8ER | statement | open | Wikidata Q1357684, EoM Riesz_representation_theorem, nLab Riesz representation theorem |
| Riesz–Fischer theorem | Y69W9YRPZS | statement | open | Wikidata Q643513, EoM Riesz-Fischer_theorem, MathWorld Riesz-FischerTheorem |
| Riesz–Markov–Kakutani representation theorem | KE6QTEDDB8 | statement | open | Wikidata Q17098001, MathWorld RieszRepresentationTheorem |
| rigged Hilbert space | KA6BFMGQRX | unknown | open | Wikidata Q1262627, EoM Rigged_Hilbert_space, nLab rigged Hilbert space |
| right adjoint | GZS6HSM2AC | unknown | open | Wikidata Q121546687, nLab right adjoint |
| right angle | RN14KED3JX | definition | open | Wikidata Q210, MathWorld RightAngle, ProofWiki Definition:Right_Angle |
| right circular cylinder | VET5901BPN | unknown | open | Wikidata Q18466467, MathWorld RightCircularCylinder |
| right conoid | PRS4AB02TE | unknown | open | Wikidata Q2686383, MathWorld RightConoid |
| right half-open interval | 7SXB227R6V | definition | open | Wikidata Q106653385, ProofWiki Definition:Real_Interval/Half-Open/Right |
| right module | XPZ92670XM | definition | open | Wikidata Q120722061, ProofWiki Definition:Right_Module |
| right trapezoid | 4MZEQ5WTAW | unknown | open | Wikidata Q12218380, MathWorld RightTrapezoid |
| right triangle | WERF6BT5XD | unknown | open | Wikidata Q158688, MathWorld RightTriangle |
| right-hand rule | P9DVVR4HWM | unknown | open | Wikidata Q1366301, MathWorld Right-HandRule |
| right-handed coordinate system | 7JYCGH652G | unknown | open | Wikidata Q2135634, MathWorld Right-HandedCoordinateSystem |
| rigid body dynamics | R81RFP73AM | topic | open | Wikidata Q2037529, nLab rigid body dynamics |
| rigid category | TF5RK02BMV | unknown | open | Wikidata Q7333804, nLab rigid monoidal category |
| rigid cohomology | PE3S7ARPDD | unknown | open | Wikidata Q7333805, nLab rigid cohomology |
| rigid transformation | 940BMP2RNS | unknown | open | Wikidata Q7333813, MathWorld EuclideanMotion |
| ring | G6QH5EW4Z5 | definition | open | Wikidata Q161172, EoM Ring, LMFDB knowl ring, Mathlib Ring, MathWorld Ring, nLab ring, ProofWiki Definition:Ring_with_Unity, Wikidata Q5051859, nLab Ring |
| ring direct product | BJAH21NK64 | unknown | open | Wikidata Q3406712, MathWorld RingDirectProduct |
| ring homomorphism | ECKQ9H3QS7 | definition | open | Wikidata Q1194212, Mathlib RingHom, MathWorld RingHomomorphism, ProofWiki Definition:Ring_Homomorphism |
| ring of algebraic integers | C6Q76DJGJS | definition | open | Wikidata Q1358313, MathWorld RingofIntegers, nLab ring of integers, ProofWiki Definition:Ring_of_Integers_of_Number_Field |
| ring of rational integers | MP52REF3ZP | definition | open | Wikidata Q121358689, ProofWiki Definition:Ring_of_Integers |
| ring spectrum | NZEX6MKMMS | unknown | open | Wikidata Q7334821, nLab ring spectrum |
| ring theory | G4H0FANEV0 | topic | open | Wikidata Q1208658, MathWorld RingTheory, nLab ring theory, ProofWiki Definition:Ring_Theory |
| ringed space | CAVEFNY76P | definition | open | Wikidata Q168344, EoM Ringed_space, nLab ringed space, ProofWiki Definition:Ringed_Space |
| ringed topos | N57JQHEPF0 | unknown | open | Wikidata Q55631722, nLab ringed topos |
| Ringel–Youngs theorem | KE76DDYBDE | conjecture | open | Wikidata Q2799491, MathWorld HeawoodConjecture |
| Riordan array (1/(1+2x), x/(1+x)). | EHZNPE53EV | object | open | Wikidata Q100194128, OEIS A103316 |
| Riordan array (1/(1-2x),x(1-x)/(1-2x)). | R4TTAXXYVV | object | open | Wikidata Q100194113, OEIS A106195 |
| Riordan array (1/(1-x), x(1+x+x^2+x^3)/(1-x)). | 5YR0F3ZQDP | object | open | Wikidata Q100194139, OEIS A103141 |
| Riordan array (1/(1-x^2),x(1+x)/(1-x)). | M98ATTE5PQ | object | open | Wikidata Q100194157, OEIS A101603 |
| Riordan number | MCF7Q38J90 | object | open | Wikidata Q131543210, OEIS A005043 |
| Risch algorithm | H3EGNMXV7B | unknown | open | Wikidata Q1382512, MathWorld RischAlgorithm |
| rising sun graph | JY92ZVF8AN | unknown | open | Wikidata Q136288669, House of Graphs 1286, MathWorld RisingSunGraph |
| RJ3MWRMGYW | RJ3MWRMGYW | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q58323267, nLab Steven Duplij |
| rng | 2EH61TBE05 | definition | open | Wikidata Q17102802, nLab nonunital ring, ProofWiki Definition:Ring_(Abstract_Algebra) |
| Road coloring problem | 4WN6TFH25R | statement | open | Wikidata Q1937896, MathWorld RoadColoringProblem |
| Robbert Dijkgraaf | AVKX3S432Z | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q710978, nLab Robbert Dijkgraaf |
| Robbins algebra | Q9WA0A9Q4A | concept | open | Wikidata Q7341067, MathWorld RobbinsAlgebra |
| Robbins conjecture | 3JWHBRM71Y | conjecture | open | Wikidata Q120446040, MathWorld RobbinsConjecture |
| Robbins constant | D5K835X4NX | object | open | Wikidata Q2994919, MathWorld RobbinsConstant |
| Robert Brandenberger | 44Z2A6B0WA | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q7342315, nLab Robert Brandenberger |
| Robert Brandom | WBEDNA8KC3 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1312168, nLab Robert Brandom |
| Robert Brout | 5VN22Y7WCA | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q151833, nLab Robert Brout |
| Robert Bruner | R7EEJCY6SQ | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q7342467, nLab Robert Bruner |
| Robert Connelly | 8TEZS3K9CX | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q3672706, nLab Robert Connelly |
| Robert Evert Stong | F0VWYMVX42 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q2158898, nLab Robert Stong |
| Robert Geroch | XN85VJD8AW | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q2157273, nLab Robert Geroch |
| Robert Ghrist | WNVBJ5JBJH | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q2157267, nLab Robert Ghrist |
| Robert Goldblatt | H1X5BVAR6K | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q7344830, nLab Robert Goldblatt, ProofWiki Mathematician:Robert_Ian_Goldblatt |
| Robert Graham Leigh | Q9R3Q0C5K1 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q7346836, nLab Robert Leigh |
| Robert Griess | HMK9BKJ08V | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q2157373, nLab Robert Griess |
| Robert Langlands | 4RRPWVAHD6 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q711278, nLab Robert Langlands |
| Robert M. Wald | EMEN9VXC0B | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q933683, nLab Robert Wald |
| Robert MacPherson | 2AFJYC6W0H | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q931297, nLab Robert MacPherson |
| Robert Marshak | WBG833QQE8 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q181687, nLab Robert Eugene Marshak |
| Robert Mills | HSB7SZ20SY | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q547394, nLab Robert Mills |
| Robert of Chester | W9HD7NJ66M | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q715419, ProofWiki Mathematician:Robert_of_Chester |
| Robert Penner | TXKGQQG4SS | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q87167335, nLab Robert Penner |
| Robert Rosebrugh | C4GP5R3Q70 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q95321162, nLab Robert Rosebrugh |
| Robert Schrader | 5SBA7AE77M | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1432895, nLab Robert Schrader |
| Robert Seiringer | 8RZJYHSHYR | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q88155, nLab Robert Seiringer |
| Robert Sorgenfrey | AW5ME10EXC | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q383976, ProofWiki Mathematician:Robert_Henry_Sorgenfrey |
| Robert Spekkens | CG7B0R33D4 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q102434111, nLab Robert Spekkens |
| Robert Wolak | 9Q3DPAB7CR | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q48847117, nLab Robert Wolak |
| Roberto Longo | MZYFCM3W0Y | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q74576041, nLab Roberto Longo |
| Roberto Peccei | 2WD713P1N1 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q2159576, nLab Roberto Peccei |
| Robertson graph | 56QAHY0H21 | unknown | open | Wikidata Q3115531, House of Graphs 1288, MathWorld RobertsonGraph |
| Robertson–Seymour theorem | XW2V9SCZDE | statement | open | Wikidata Q3527155, MathWorld Robertson-SeymourTheorem |
| Robertson–Wegner graph | JFZEC8R6PV | unknown | open | Wikidata Q3115528, House of Graphs 1290, MathWorld Robertson-WegnerGraph |
| Robin boundary condition | EEPN1PZ8JG | concept | open | Wikidata Q748993, MathWorld RobinBoundaryConditions |
| Robin Cockett | ZMKR8YTN6A | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q93944803, nLab Robin Cockett |
| Robin Hartshorne | JMRRQFR8WE | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1356332, nLab Robin Hartshorne |
| Robin Milner | 3EXVM7K1B8 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q92643, nLab Robin Milner |
| Robinson arithmetic | XHQAEVMQWB | unknown | open | Wikidata Q928884, nLab Robinson arithmetic |
| Robinson projection | CYED3M2AXY | unknown | open | Wikidata Q963903, MathWorld RobinsonProjection |
| Robinson–Schensted correspondence | 6AZN06030D | unknown | open | Wikidata Q2997917, EoM Robinson-Schensted_correspondence, MathWorld SchenstedCorrespondence |
| Robion Kirby | WTV7CHBSYT | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1385486, nLab Robion Kirby |
| robotics | EX4KS9AQAH | unknown | open | Wikidata Q170978, EoM Robotics,_mathematical_problems_in |
| robust statistics | B6XR09SY79 | unknown | open | Wikidata Q1665389, MathWorld RobustEstimation |
| rocket science | P0088SH4C3 | definition | open | Wikidata Q1446961, ProofWiki Definition:Rocket_Science |
| Rocq prover | J2DYX5TP4E | unknown | open | Wikidata Q1131652, nLab Rocq |
| Rod Crewther | QFC8W4YNCV | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q7356160, nLab Rodney Crewther |
| Rodion Kuzmin | V4M9Z0CJK3 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q959719, ProofWiki Mathematician:Rodion_Osievich_Kuzmin |
| Rodrigues' rotation formula | 1RPV5F8GBF | unknown | open | Wikidata Q1473494, MathWorld RodriguesRotationFormula |
| Roger Godement | T00AKT19GM | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q930720, nLab Roger Godement |
| Roger Penrose | VJMXECEBPN | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q193803, nLab Roger Penrose |
| Rogers–Ramanujan identities | P59VTB7VJK | statement | open | Wikidata Q7359380, MathWorld Rogers-RamanujanIdentities |
| Roland Omnès | 2C6GQT84GP | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q1252465, nLab Roland Omnès |
| Roland Schwänzl | HRZ77Q3W3J | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q2163035, nLab Roland Schwänzl |
| Rolle's theorem | MQ6Q0R31SB | statement | open | Wikidata Q193286, EoM Rolle_theorem, Mathlib exists_deriv_eq_zero, MathWorld RollesTheorem, ProofWiki Rolle's_Theorem |
| Roman Bezrukavnikov | GTH5YZMN03 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q7361591, nLab Roman Bezrukavnikov |
| Roman Jackiw | F3RSBV0NFH | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q2164635, nLab Roman Jackiw |
| Roman numerals | WR8BJ3Z4G8 | definition | open | Wikidata Q38918, MathWorld RomanNumerals, ProofWiki Definition:Roman_Numerals |
| Roman Orus | 7ERXZVMD9M | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q57420520, nLab Roman Orus |
| Roman surface | PQNTFCRFK6 | unknown | open | Wikidata Q697161, MathWorld RomanSurface |
| Romania | 2RKS7RYYY6 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q218, ProofWiki Mathematician:Mathematicians/Sorted_By_Nation/Romania |
| Romberg's method | 2W78T2TXY4 | unknown | open | Wikidata Q1078449, MathWorld RombergIntegration |
| Ronald Fisher | G8AQ7PTEWC | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q216723, EoM Fisher,_Ronald_Aylmer |
| Ronald Graham | C1XY77ACZT | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q712620, ProofWiki Mathematician:Ronald_Lewis_Graham |
| Ronald N. Bracewell | AWKBV2K779 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q3441496, ProofWiki Mathematician:Ronald_Newbold_Bracewell |
| ronna | 9SCQ3177PX | definition | open | Wikidata Q107914880, ProofWiki Definition:Metric_System/Scaling_Prefixes/Ronna- |
| ronto | EAB7FKCCRQ | definition | open | Wikidata Q107915272, ProofWiki Definition:Metric_System/Scaling_Prefixes/Ronto- |
| rook | 1Q05S6BHHZ | definition | open | Wikidata Q137, ProofWiki Definition:Chess/Piece/Rook |
| rook polynomial | CKYPTQFYXZ | unknown | open | Wikidata Q12594240, MathWorld RookPolynomial |
| rook's graph | 567N6QXJMM | unknown | open | Wikidata Q7366184, MathWorld RookGraph |
| Room square | XS472H02TH | concept | open | Wikidata Q7366296, MathWorld RoomSquare |
| root locus | 9H95PMQ367 | topic | open | Wikidata Q957693 |
| root mean square | J7WHXVWKCG | unknown | open | Wikidata Q223323, MathWorld Root-Mean-Square |
| root node | 7E63BB5NXT | unknown | open | Wikidata Q1757074, MathWorld RootVertex |
| root of unity | BWNVNZSQA0 | unknown | open | Wikidata Q756747, MathWorld RootofUnity, nLab root of unity |
| root of unity modulo n | R48J5HKM91 | definition | open | Wikidata Q7366581, ProofWiki Definition:Root_of_Unity_Modulo_m |
| root system | TKQ4ETCN02 | unknown | open | Wikidata Q534131, Mathlib RootPairing.IsRootSystem, MathWorld RootSystem |
| root test | SX85AYT8K5 | unknown | open | Wikidata Q846705, MathWorld RootTest |
| rooted graph | 3PHER367AR | unknown | open | Wikidata Q7366593, MathWorld RootedGraph |
| rooted tree | XP9BWWD07N | unknown | open | Wikidata Q63721528, MathWorld RootedTree |
| rose | SS1TVN41AF | concept | open | Wikidata Q1155211, MathWorld RoseCurve |
| Rosenbrock function | 5DYCA8QZ1M | unknown | open | Wikidata Q2981936, MathWorld RosenbrockFunction |
| Rosenbrock methods | GN1M4XDM01 | unknown | open | Wikidata Q7368544, EoM Rosenbrock_methods, MathWorld RosenbrockMethods |
| Roshdi Rashed | HP5TX74ZYX | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q3442614, ProofWiki Mathematician:Roshdi_Rashed |
| Rosser's theorem | E8FYBKEVX5 | statement | open | Wikidata Q867839, MathWorld RossersTheorem |
| rotation | AG9PBHGZDK | unknown | open | Wikidata Q107617, MathWorld Rotation, Wikidata Q848368, EoM Rotation |
| rotation group SO(3) | TNN4XP7CS9 | unknown | open | Wikidata Q1256500, nLab SO(3) |
| rotation matrix | 278PN8MHW9 | unknown | open | Wikidata Q1256564, MathWorld RotationMatrix |
| rotational symmetry | BZB61W9F56 | unknown | open | Wikidata Q593950, MathWorld RotationalSymmetry |
| rotunda | V2X9YCC5ZY | unknown | open | Wikidata Q2493022, MathWorld Rotunda |
| Rouché's theorem | XH89A81K7W | statement | open | Wikidata Q1191862, ProofWiki Rouché's_Theorem |
| rough number | CW83V9J357 | unknown | open | Wikidata Q1755380, MathWorld RoughNumber |
| roulette | 8J8AY17GBJ | unknown | open | Wikidata Q2810237, MathWorld Roulette |
| round brackets | GCXBGTV46B | unknown | out_of_scope (a notation: the notation register holds it (corpus spec K10.4)) | Wikidata Q10345750, MathWorld Parenthesis, ProofWiki Symbols:Brackets/Round_Brackets |
| round-off error | 807F0GXGFT | unknown | open | Wikidata Q2145211, MathWorld RoundoffError |
| rounded rectangle | E68KQT9JYH | unknown | open | Wikidata Q120446160, MathWorld RoundedRectangle |
| rounding | DAFRK6DZ8G | unknown | open | Wikidata Q663208, MathWorld Rounding |
| route inspection problem | BTQWDBVCC5 | definition | open | Wikidata Q901096, MathWorld ChinesePostmanProblem, ProofWiki Definition:Chinese_Postman_Problem |
| Routh's theorem | SYMS3Y5M0B | statement | open | Wikidata Q1789863, MathWorld RouthsTheorem |
| Routh–Hurwitz theorem | QNKX9M4KDX | statement | open | Wikidata Q4455015, MathWorld Routh-HurwitzTheorem |
| row space | GGD7N9441C | unknown | open | Wikidata Q4131086, MathWorld RowSpace |
| row vector | GSCE0BE43F | unknown | open | Wikidata Q2916003, MathWorld RowVector |
| Royle graph | 97RSAYY0VQ | unknown | open | Wikidata Q118371984, MathWorld RoyleGraphs |
| RQY634AR2V | RQY634AR2V | statement | open | Wikidata Q23488, MathWorld 6, ProofWiki 6 |
| RR6S4NA2QG | RR6S4NA2QG | topic | open | Wikidata Q114705940 |
| RSA cryptosystem | 7EDMVKVWPC | definition | open | Wikidata Q181551, MathWorld RSAEncryption, ProofWiki Definition:RSA_Algorithm |
| RSA number | A2H8E76MRB | unknown | open | Wikidata Q1072840, MathWorld RSANumber |
| Ruben Minasian | NE209QMNFY | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q53973796, nLab Ruben Minasian |
| rubidium | QEKRC27NZ8 | definition | open | Wikidata Q895, ProofWiki Definition:Rubidium |
| rubidium-87 | HS6S1Y1GP0 | definition | open | Wikidata Q2019749, ProofWiki Definition:Rubidium/87 |
| Rubik's Clock | 1HY5WNSF5H | unknown | open | Wikidata Q1759004, MathWorld RubiksClock |
| Rubik's Cube | V2NN3S9HDB | unknown | open | Wikidata Q47043, MathWorld RubiksCube |
| Rubik's Cube group | RF1Y9DXZAK | unknown | open | Wikidata Q3123152, MathWorld RubiksGroup |
| Rudolf Carnap | RJWCBS7VJV | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q76519, nLab Rudolf Carnap |
| Rudolf Clausius | DS41149J5G | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q30693, nLab Rudolf Clausius |
| Rudolf Haag | 8JH842RNVC | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q91636, nLab Rudolf Haag |
| Rudvalis group | 58ZPFPJ6GS | unknown | open | Wikidata Q3117698, MathWorld RudvalisGroup |
| Ruelle zeta function | V5WRN5WAMQ | unknown | open | Wikidata Q7377817, nLab Ruelle zeta function |
| Ruffini's rule | 79AX7SKXAS | unknown | open | Wikidata Q2704282, MathWorld RuffinisRule |
| Rule 110 | 9049JE4MBR | unknown | open | Wikidata Q1876486, MathWorld Rule110 |
| Rule 30 | D8H6CZ9AZ3 | unknown | open | Wikidata Q2918510, MathWorld Rule30 |
| Rule 90 | GEX019V43A | unknown | open | Wikidata Q7378926, MathWorld Rule90 |
| rule of 72 | H1V77CM1V3 | unknown | open | Wikidata Q264016, MathWorld Ruleof72 |
| rule of inference | 126Y0800YD | unknown | open | Wikidata Q1068763, MathWorld RuleofInference |
| rule of product | SMEW0A1CWG | unknown | open | Wikidata Q557624, MathWorld MultiplicationPrinciple |
| ruled surface | XHGKJPQFVG | unknown | open | Wikidata Q840376, MathWorld RuledSurface |
| ruler | VB6EBP3CDC | unknown | open | Wikidata Q104555, MathWorld Ruler |
| ruler function | H0YGFYB1E1 | unknown | open | Wikidata Q111940079, MathWorld RulerFunction |
| rules of chess | KXWAV1G1MP | definition | open | Wikidata Q3392263, ProofWiki Definition:Chess/Rules |
| Runge's theorem | 5GBRDX152P | statement | open | Wikidata Q1505529, MathWorld RungesTheorem |
| Runge–Kutta method | XA3PYPS766 | statement | open | Wikidata Q725944, EoM Runge-Kutta_method, MathWorld Runge-KuttaMethod |
| Russell's paradox | W14383V9WF | statement | open | Wikidata Q33401, MathWorld RussellsAntinomy, nLab Russell's paradox, ProofWiki Russell's_Paradox |
| Russia | A0WRYQWKW2 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q159, ProofWiki Mathematician:Mathematicians/Sorted_By_Nation/Russia |
| Russian roulette | 9E30TX63XY | unknown | open | Wikidata Q201045, MathWorld RussianRoulette |
| Ruth–Aaron pair | WK3KAPPZ6S | concept | open | Wikidata Q3099291, MathWorld Ruth-AaronPair |
| Ryan Rohm | GME50G2JCC | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q15455400, nLab Ryan Rohm |
| Ryan Thorngren | KVDFE0K561 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q59675435, nLab Ryan Thorngren |
| Rydberg constant | CQ6KDKW8JZ | definition | open | Wikidata Q658065, ProofWiki Definition:Rydberg_Constant |
| Ryszard Engelking | TVZRR1MS6S | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q737661, nLab Ryszard Engelking |
| Rössler attractor | JGJ8XNN82Q | unknown | open | Wikidata Q720574, MathWorld RoesslerAttractor |
| Rǎzvan Gelca | 9S8ZYATFMJ | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q93435431, nLab Razvan Gelca |