Recurrence Relation for Polygamma Function/Also presented as

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Recurrence Relation for Polygamma Function: Also presented as

The Recurrence Relation for Polygamma Function can also be presented as:

$\map {\psi_n} {z + 1} = \map {\psi_n} z + \dfrac {\paren {-1}^n n!} {z^{n + 1} }$