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The $13$th letter of the Greek alphabet.

Minuscule: $\nu$
Majuscule: $\Nu$

The $\LaTeX$ code for \(\nu\) is \nu .

The $\LaTeX$ code for \(\Nu\) is \Nu .

Nu Function

$\map \nu n$

The $\nu$ function is the function $\nu: \Z_{>0} \to \Z_{>0}$ is defined as:

$\forall n \in \Z_{>0}: \map \nu n = $ the number of types of group of order $n$

The $\LaTeX$ code for \(\map \nu n\) is \map \nu n .