Euler's totient function

English

Etymology

Named after Swiss mathematician Leonhard Euler (1707–1783).

Proper noun

Euler's totient function

1. (number theory) The function that counts how many integers below a given integer are coprime to it.

Usage notes

• Usually denoted with the Greek letter phi ($\phi$ or $\varphi$).

Related terms

• Euler's formula

Translations

number theory

• Finnish: Eulerin φ-funktio
• German: Eulersche Phi-Funktion
• Icelandic: phi-fall Eulers n
• Italian: funzione phi di Eulero f
• Japanese: オイラーのφ関数
• Russian: фу́нкция Э́йлера f (fúnkcija Éjlera)
• Spanish: función fi de Euler f
• Swedish: Eulers phi-funktion