Add Maths / Sigmoid Function (#3880)

* Add Maths / Sigmoid Function

* Update Sigmoid Function

* Add doctest and type hints

* Fix Trim Trailing Whitespace

* Fix Error

* Modified Black

* Update sigmoid.py

Co-authored-by: sukyung99 <tnrudsla413@gmail.com>
Co-authored-by: Christian Clauss <cclauss@me.com>

sukyung99 committed 5y ago

78a0f61b1912206d7bfdc3f0604c1fba60bb605f

Parent: c6dd975

Committed by GitHub <noreply@github.com> on 11/15/2020, 3:44:40 AM