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Newsgroups: comp.lang.ada
Date: Tue, 2 Apr 2019 03:39:57 -0700 (PDT)
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Subject: Re: Erfc() function in ADA
From: gautier_niouzes@hotmail.com
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Xref: reader01.eternal-september.org comp.lang.ada:56046
Date: 2019-04-02T03:39:57-07:00
List-Id: <comp.lang.ada>

A few random remarks...

1) For further references: there is now in Mathpaqs (rev. 153+) a separate Erf_function package.
Since Phi_function.Phi uses Erf(x) anyway, it's better to have access to Erf directly.

2) About the Numerical Recipies: be careful, some versions support only 7-8 digits (single precision), so numerical errors cumulate very quickly.

3) Some good stuff can be found in the Alglib and Cephes libraries, in C, Fortran or Pascal

4) Simple special functions (with one parameter) could well be in an official Ada.Numerics.Generic_Special_Functions (low maintenance effort for compiler vendors)

5) Don't forget to check: https://www.adaic.org/ada-resources/tools-libraries/

6) Perhaps the Alire system has some math packages ?