**manifolds** and **cobordisms**

cobordism theory, *Introduction*

**Definitions**

**Genera and invariants**

**Classification**

**Theorems**

A manifold is called **closed** if it is

In contrast, a manifold without boundary all whose connected components are non-compact is called an *open manifold*.

See also

- Wikipedia,
*Closed manifold*

Last revised on November 6, 2021 at 06:09:55. See the history of this page for a list of all contributions to it.