Pin(4)

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

**spin geometry**, **string geometry**, **fivebrane geometry** …

**rotation groups in low dimensions**:

see also

**rotation groups in low dimensions**:

see also

Created on August 22, 2019 at 10:02:55. See the history of this page for a list of all contributions to it.