**homotopy theory, (∞,1)-category theory, homotopy type theory**

flavors: stable, equivariant, rational, p-adic, proper, geometric, cohesive, directed…

models: topological, simplicial, localic, …

see also **algebraic topology**

**Introductions**

**Definitions**

**Paths and cylinders**

**Homotopy groups**

**Basic facts**

**Theorems**

A square matrix $A$ is called *skew-symmetric* if it is equal to minus own transpose matrix: $A = - A^T$.

See also

- Wikipedia,
*Skew-symmetric matrix*

Last revised on February 5, 2021 at 05:44:46. See the history of this page for a list of all contributions to it.