Want to take part in these discussions? Sign in if you have an account, or apply for one below
Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.
started an entry on the Borel construction, indicating its relation to the nerve of the action groupoid.
That is very useful and very ’timely’ as I was looking for a good reference for the Borel construction and orbifolds. :-)
added a subsection called
As a homotopy colimit over the category associated to $G$
This entry was lacking a decent reference. I have taken the liberty now of pointing to
Please feel invited to add you favorite classical textbook account on the Borel construction, instead (which is?)
added mentioning of the simplicial version and some lines (here) relating to the model structure on simplicial group actions
have removed, in that Prop, the assumption that the fundamental group is abelian, and instead added the remark to the proof that the five-lemma still applies.
Of course it does. I have tried to make up for being silly here, previously, by expanding a little at five lemma on the case of homological categories.
1 to 9 of 9