nLab
deck transformation

Definition

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

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

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