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  "body": "\n## Summary\n\nThe Möbius function $\\mu$ is an arithmetic function that is $0$ on integers with a square factor greater than $1$.\nOn a squarefree integer, its value $1$ or $-1$ depends on the parity of the number of prime factors.\nThe [[definition of the Möbius function|0C8QENHYZW]] gives the precise form.\n",
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