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Psi function, also known as digamma function, is defined as
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This function is calculated by Psi subroutine.
This article is intended for personal use only.
C# source.
C++ source.
C++ source. MPFR/GMP is used.
GMP source is available from gmplib.org. MPFR source is available from www.mpfr.org.
FreePascal version.
Delphi version.
VB.NET version.
VBA version.
Python version (CPython and IronPython are supported).
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ALGLIB® - numerical analysis library, 1999-2012. |