# nLab deck transformation

###### Definition

A deck transformation or cover automorphism is an automorphism of a cover.

i.e. if $p:E\to X$ is a cover then a cover automorphism $f\in deck(p)=\{f|f\in Aut(E), p\circ f=p\}\subseteq Aut(E)$ is an automorphism of $E$ such that $p$ is invariant under composition with $f$.

Created on June 8, 2012 18:39:07 by Stephan Alexander Spahn (79.227.163.74)