nLab
sigma-compact topological space

Context

Topology

topology (point-set topology, point-free topology)

see also differential topology, algebraic topology, functional analysis and topological homotopy theory

Introduction

Basic concepts

Universal constructions

Extra stuff, structure, properties

Examples

Basic statements

Theorems

Analysis Theorems

topological homotopy theory

Contents

Definition

A topological space is called sigma-compact if it is the union of a countable set of compact subspaces.

Properties

Examples

References

Revised on May 24, 2017 14:32:22 by Urs Schreiber (131.220.184.222)