Timeline for Profinite groups as étale fundamental groups

9 events

when toggle format	what		by	license	comment
Apr 5, 2013 at 13:05	comment	added	Konrad Voelkel		@Jason, could you give me some hint where I could find something like a Jouanolou trick (equivariantly or some analogue or anything like it) in Looijenga's work?
Apr 3, 2013 at 15:18	comment	added	Jason Starr		I have also heard "Jouanlou's trick" above in reference to work of Looijenga
Dec 2, 2012 at 13:20	comment	added	Angelo		Dear Martin, $X/G$ is an approximation of $BG$; by choosing the codimension of the complements of the $U_i$ to be higher and higher, and going to the limit in an appropriate sense, we can obtain an algebraic version of $BG$. This is an idea of Totaro, and is behind the Edidin and Graham construction of equivariant intersection theory.
Dec 2, 2012 at 11:46	vote	accept	Martin Brandenburg
Dec 2, 2012 at 6:48	history	edited	Angelo	CC BY-SA 3.0	added 584 characters in body
Dec 1, 2012 at 19:00	comment	added	Martin Brandenburg		Angelo, thank you very much. Could you explain what you mean precisely with "$X$ is obtained with an easy equivariant extension of Jouanolou's trick."? Also, that $X$ resembles somehow topologist's $BG$, right?
Dec 1, 2012 at 17:12	history	edited	Angelo	CC BY-SA 3.0	added 1394 characters in body
Dec 1, 2012 at 11:11	history	edited	Angelo	CC BY-SA 3.0	added 151 characters in body
Dec 1, 2012 at 11:04	history	answered	Angelo	CC BY-SA 3.0