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Fungrim entry: eae0de

(mn)        (φ(m)φ(n))\left(m \mid n\right) \;\implies\; \left(\varphi(m) \mid \varphi(n)\right)
Assumptions:mZ0  and  nZ0m \in \mathbb{Z}_{\ge 0} \;\mathbin{\operatorname{and}}\; n \in \mathbb{Z}_{\ge 0}
\left(m \mid n\right) \;\implies\; \left(\varphi(m) \mid \varphi(n)\right)

m \in \mathbb{Z}_{\ge 0} \;\mathbin{\operatorname{and}}\; n \in \mathbb{Z}_{\ge 0}
Fungrim symbol Notation Short description
Totientφ(n)\varphi(n) Euler totient function
ZZGreaterEqualZn\mathbb{Z}_{\ge n} Integers greater than or equal to n
Source code for this entry:
    Formula(Implies(Divides(m, n), Divides(Totient(m), Totient(n)))),
    Variables(m, n),
    Assumptions(And(Element(m, ZZGreaterEqual(0)), Element(n, ZZGreaterEqual(0)))))

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2021-03-15 19:12:00.328586 UTC