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variants of this functions
PolyGamma




Mathematica Notation

Traditional Notation









Gamma, Beta, Erf > PolyGamma[z] > Series representations





Generalized power series (22 formulas)


>   Expansions at z==0 (5 formulas)
>   Expansions at z==z0/;z0!=-n (5 formulas)
>   Expansions at z==-n (4 formulas)
>   Expansions of psi(z+Epsilon) at Epsilon==0/;z!=-n (4 formulas)
>   Expansions of psi(-n+Epsilon) at Epsilon==0 (4 formulas)