- 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 cyclic group of order 4.

Besides the Klein four-group $\mathbb{Z}/2 \times \mathbb{Z}/2$, the cyclic group of order 4 is the only other group of order 4, up to isomorphism.

**ADE classification** and **McKay correspondence**

- group names,
*C4*

Created on August 29, 2019 at 14:13:50. See the history of this page for a list of all contributions to it.