Multiplicativity of the Euler totient function
= Multiplicativity of the Euler totient function
{wiki}
For coprime positive integers m and n, the Chinese remainder theorem gives phi(mn)=phi(m)phi(n).
= Multiplicativity of the Euler totient function
{wiki}
For coprime positive integers m and n, the Chinese remainder theorem gives phi(mn)=phi(m)phi(n).