Changes

*This is often called the Polygamma function.

*This is often called the Polygamma function.

*Gamma, Lgamma, Digamma and Trigamma functions are internal generic primitive functions.  

*Gamma, Lgamma, Digamma and Trigamma functions are internal generic primitive functions.  

*Normally the number <math>e</math to the power <math>{GAMMALN(x)}</math>, where <math>x</math> is an integer, is same as <math>(x-1)!</math>.

*Normally the number <math>e to the power {GAMMALN(x)}</math>, where <math>x</math> is an integer, is same as <math>(x-1)!</math>.

:<math>GAMMALN=LN(GAMMA(x))</math>,

:<math>GAMMALN=LN(\GAMMA(x))</math>,

where

where

: <math>GAMMA(x) = \int\limits_{0}^{\infty} t^{x-1} e^{-t} dt</math>  

: <math>\GAMMA(x) = \int\limits_{0}^{\infty} t^{x-1} e^{-t} dt</math>  

it is for all complex numbers except the negative integers and zero.

it is for all complex numbers except the negative integers and zero.

*This function will give the result as error when

*This function will give the result as error when