Second Countable Topology

A topological space is second countable if it has a countable topological basis.

See also

Topological Basis, Topological Space

Explore with Wolfram|Alpha

More things to try:

Cite this as:

Weisstein, Eric W. "Second Countable Topology." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/SecondCountableTopology.html

Subject classifications