Talk:Crossed module
Template:WikiProject banner shell there ought to be a homotopy theoretic example, but i have'nt figured it out yet. Bgohla 12:56, 2005 Jun 2 (UTC)
Just for the record, there is one now. --Toby Bartels 05:00, 11 June 2006 (UTC)
The action of $G$ on $H$ should be acting as automorphsims of $H$.--刻意(Kèyì) 17:20, 2 May 2013 (UTC)
External links modified
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