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digamma function

   Also found in: Wikipedia 0.01 sec.
digamma function [′dī‚gam·ə ‚fəŋk·shən]
(mathematics)
The derivative of the natural logarithm of the gamma function.


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2] ([PSI](1, N + 1 - x) - [PSI](1, -N + 1 - x)) as well, where [PSI](n, x) is the nth polygamma function, which is the nth derivative of the digamma function, [PSI](x) := (ln([GAMMA](x)))'= [GAMMA]'(x)/[GAMMA](x).
t], is the first derivative of the total support function, (3) [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] where [Psi](w) = d/dw log [Gamma](w) is the digamma function.
Provides introductory material to required mathematical topics such as complex numbers, Laplace and Fourier transforms, matrix algebra, confluent hypergeometric functions, digamma functions, and Bessel functions.
 
 
 
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