cofibration

If $X$ is a topological space and $A$ is a subspace of $X$, the inclusion map $i:A\to X$ is a cofibration if it has the homotopy extension property with respect to any space $Y$.

Title	cofibration
Canonical name	Cofibration
Date of creation	2013-03-22 12:13:32
Last modified on	2013-03-22 12:13:32
Owner	RevBobo (4)
Last modified by	RevBobo (4)
Numerical id	6
Author	RevBobo (4)
Entry type	Definition
Classification	msc 55P05
Related topic	Fibration2