Group Theory
------------

<!--
SPDX-FileCopyrightText: Chris Pressey, the original author of this work, has dedicated it to the public domain.

SPDX-License-Identifier: CC0-1.0
-->

[(Up)](../../README.md#topics) | _Wikipedia: [Group theory](https://en.wikipedia.org/wiki/Group_theory)_

- - - -


### Web resources

[Intuition behind Group Action](https://math.stackexchange.com/questions/4074086/intuition-behind-group-action) ★

[Nielsen--Schreier theorem - Wikipedia](https://en.wikipedia.org/wiki/Nielsen%E2%80%93Schreier_theorem) [💭](commentary/cpressey.md#nielsen-schreier-theorem-wikipedia)

[Bass--Serre theory - Wikipedia](https://en.wikipedia.org/wiki/Bass%E2%80%93Serre_theory)

[Is there a generalization of the free group that includes infinitely long words?](https://math.stackexchange.com/questions/2780012/is-there-a-generalization-of-the-free-group-that-includes-infinitely-long-words) ★

[Is Group Theory useful in Computer Science in other areas but cryptography?](https://cs.stackexchange.com/questions/127978/is-group-theory-useful-in-computer-science-in-other-areas-but-cryptography) ★ [💭](commentary/cpressey.md#is-group-theory-useful-in-computer-science-in-other-areas-but-cryptography)

[Do all Noether theorems have a common mathematical structure?](https://physics.stackexchange.com/questions/597734/do-all-noether-theorems-have-a-common-mathematical-structure) ★ [💭](commentary/cpressey.md#do-all-noether-theorems-have-a-common-mathematical-structure)