[jiterator] polygamma (#71162)
Summary:
Reference: https://github.com/pytorch/pytorch/issues/69463
TODO:
* [x] Add note regarding how to capture value and it's limitations.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/71162
Reviewed By: ngimel
Differential Revision: D33697346
Pulled By: mruberry
fbshipit-source-id: 0308a6c12cf4b488ab26bdae14291c1f6dbba9ab
(cherry picked from commit 0d3f8c52a17b63079c0d09c965d76cc27cd69146)
