[issue37946] Add the Bessel functions of the first and second kind to the math module

[Pablo Galindo Salgado]

New submission from Pablo Galindo Salgado <pablogsal at gmail.com>:

After repeatedly having to add 3rd party libraries only for the these functions or having to implement them myself quick and dirty based on numerical integration, I suggest add the Bessel functions of the first and second kind to the math module. These functions tend to appear a lot (but not restricted to) when evaluating systems that are defined on cylindrical geometries, restrictions or approximations (like the proximate solution to Kepler's equation as a truncated Fourier sine series) and many other special functions can be described as series involving them.

Based on the fact that many libc implementations include them I think the cost-benefit of exposing them when available is acceptable.

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components: Extension Modules
messages: 350477
nosy: mark.dickinson, pablogsal, rhettinger
priority: normal
severity: normal
status: open
title: Add the Bessel functions of the first and second kind to the math module
type: enhancement
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37946>
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