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SPECIAL

ALGEBRA

BASIC

CALCULUS

CAS

DATA

ELEMENTARY

GRAPHING

MANUAL

MATRIX

NUMBER

PLOT

SCRIPTING

SPECIAL POLYNOMIALS

STATISTICAL

TRIGONOMETRIC

VECTOR CALCULUS
  PolyGamma(n, z)
n
n can be any integer >= -1
When n==-1 the LnGamma(z) function is returned.
When n==0 the DiGamma(z) or Psi(z) function is returned.
When n>0 the (n+1) derivative of the Logarithm of the Gamma(z) function is returned.

z
Real or complex number.


Description
Returns the PolyGamma function.


Examples  












References
http://mathworld.wolfram.com/PolygammaFunction.html

Related Functions
LnGamma, Gamma, DiGamma, Psi





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