Classifying spaces for proper group actions (Ex)

Revision as of 14:40, 29 July 2013

Let $<wikitex>; Let $D_{\infty} = \Zz \rtimes \Zz/2 = \Zz/2 \ast \Zz/2$ be the infinite dihedral group. Show that $\Rr$ with the obvious $D_{\infty}$-action is a model for $\underline{E}D_{\infty}$; see [[Classifying spaces for families of subgroups]]. </wikitex> == References == {{#RefList:}} [[Category:Exercises]] [[Category:Exercises without solution]]D_{\infty} = \Zz \rtimes \Zz/2 = \Zz/2 \ast \Zz/2$ be the infinite dihedral group. Show that $\Rr$ with the obvious $D_{\infty}$-action is a model for $\underline{E}D_{\infty}$; see Classifying spaces for families of subgroups.

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