[J3] More Bessel functions

Fred J. Tydeman tydeman at tybor.com
Wed Jan 20 18:35:58 UTC 2021

On Wed, 20 Jan 2021 08:13:20 -1000 (HST) Fred J. Tydeman via J3 wrote:
>On Wed, 20 Jan 2021 10:48:04 -0700 Dan Nagle via J3 wrote:
>>The Bessel stuff isn't in the C standard
>Agreed.  But, there are standard extensions.
>There is an international standard about many of the special math functions:
>  ISO/IEC 24747 Special Math
>I believe that this 
>  http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1292.pdf
>  Extensions to the C Library, to Support Mathematical Special Functions
>is the "same" as that ISO document

It appears that those functions have been added to the C++ standard.
  ISO/IEC JTC1 SC22 WG21 N4860
  ISO/IEC DIS 14882:2020(E)

One such math function is:
  Clause is Regular modified cylindrical Bessel functions

Fred J. Tydeman        Tydeman Consulting
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