Contents

group theory

# Contents

## Idea

The study of groups.

There are many generalizations and related structures; for example the vertical categorifications of groups like 2-groups, horizontal categorifications as groupoids, groups with structure, like topological groups, Lie groups, thus also Lie groupoids, Lie infinity-groupoids; and noncommutative generalizations like quantum groups. Lie and algebraic group(oid)s have their infinitesimal precursors like formal groups, local Lie groups, tangent Lie algebras, tangent Lie algebroids etc. In the smooth context the relation between Lie groupoids and Lie algebroids is the subject of Lie theory.

## Literature

Lecture notes

Textbook accounts

in general

in a more general context of algebra:

and in relation to applications in (quantum) physics:

On aspects of group theory seen inside homotopy theory/$\infty$-group theory: