# Category:F-Sigma Sets

Jump to navigation
Jump to search

This category contains results about $F_\sigma$ sets.

Let $T = \left({S, \tau}\right)$ be a topological space.

An **$F_\sigma$ set (F-sigma set)** is a set which can be written as a countable union of closed sets of $T$.

## Pages in category "F-Sigma Sets"

The following 13 pages are in this category, out of 13 total.