Sigma-Compact Topological Space

A -compact topological space is a topological space that is the union of countably many compact subsets.

See also

Compact Subset, Topological Space

This entry contributed by Mirko Hessel

Explore with Wolfram|Alpha

More things to try:

Cite this as:

Weisstein, Eric W., with contributions by Mirko Hessel. "Sigma-Compact Topological Space." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Sigma-CompactTopologicalSpace.html

Subject classifications