Math 2.0

concept

Two-sided ideal

Summary

A two-sided ideal of a ring is an additive subgroup that is closed under multiplication by ring elements on the left and on the right. The two-sided ideals are the kernels of ring homomorphisms. The definition of a two-sided ideal gives the conditions.

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Sources

  1. Web https://en.wikipedia.org/wiki/Ideal_(ring_theory), Definitions