Glossary math Term Page
Euler's totient function
the number of integers from 1 to `n` that are coprime to `n`
Core Idea
Euler's totient function is the number of integers from 1 to n that are coprime to n. It usually makes the most sense alongside Euler's theorem, coprime, Fermat's little theorem.
Why It Matters Here
Mathbong reuses this term across number-theory posts as shared vocabulary.