Apéry's constant

English

Etymology

Named after French mathematician Roger Apéry who proved in 1978 that it is an irrational number.

Proper noun

1. Template:Lb The number $\zeta (3)=\sum _{n=1}^{\mathrm{\infty }}\frac{1}{n^3}$, where Template:Math is the Riemann zeta function, with a value of approximately 1.2020569…