- group, ∞-group
- group object, group object in an (∞,1)-category
- abelian group, spectrum
- super abelian group
- group action, ∞-action
- representation, ∞-representation
- progroup
- homogeneous space

**Classical groups**

**Finite groups**

**Group schemes**

**Topological groups**

**Lie groups**

**Super-Lie groups**

**Higher groups**

**Cohomology and Extensions**

**Related concepts**

The universal group extension of alternating groups $A_n$.

These are double covers except for the alternating groups of degree $n = 6$ and 7 where the covers are 6-fold.

- for $A_5$: binary icosahedral group

Last revised on November 16, 2020 at 17:46:18. See the history of this page for a list of all contributions to it.