# Is there a name for a topological space $X$ in which very closed set is contained in a countable union of compact sets?

Is there a name for a topological space $X$ which satisfies the following condition:

Every closed set in $X$ is contained in a countable union of compact sets

Does Baire space satisfy this condition?

Thank you!

#### Solutions Collecting From Web of "Is there a name for a topological space $X$ in which very closed set is contained in a countable union of compact sets?"

This property is equivalent to $\sigma$-compactness, which says that the space itself is a countable union of compact subsets. If your property holds for a space $X$, then since $X$ is a closed subspace of itself, it is contained in a countable union of compact subsets. Conversely, if $X$ is $\sigma$-compact, then your property holds because every subset is contained in a countable union of compact subsets.