**Apéry's constant**is the D993: Real number \begin{equation} \zeta(3) : = \sum_{n = 1}^{\infty} \frac{1}{n^3} \end{equation}

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▾ Alphabet

▾ Deduction system

▾ Theory

▾ Zermelo-Fraenkel set theory

▾ Set

▾ Binary cartesian set product

▾ Binary relation

▾ Map

▾ Operation

▾ N-operation

▾ Binary operation

▾ Enclosed binary operation

▾ Groupoid

▾ Semigroup

▾ Standard N-operation

▾ Indexed sum

▾ Series

▾ Harmonic complex series

▾ Real harmonic series

Formulation 0

The **Apéry's constant** is the D993: Real number
\begin{equation}
\zeta(3)
: = \sum_{n = 1}^{\infty} \frac{1}{n^3}
\end{equation}