Apéry's constant

English

Etymology

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

Proper noun

Apéry's constant

(mathematics) The number $\zeta (3)=\sum _{n=1}^{\infty }{\frac {1}{n^{3}}}$ , where $ζ$ is the Riemann zeta function, with a value of approximately 1.2020569…

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