Timeline for Mackey Obstruction Class with Integral Coefficients

7 events

when toggle format	what		by	license	comment
May 26, 2017 at 17:47	history	edited	Clay Cordova	CC BY-SA 3.0	edited title
May 26, 2017 at 17:41	comment	added	Clay Cordova		Thanks Jim. My (perhaps incorrect) suspicion is that I am looking for a Mackey class with integer (as opposed to U(1)) coefficients. In the example case discussed above, the difference between the representations could be captured by $H^{2}(G,\mathbb{Z}_{n})$. The question is given a representation $V$ of $H$ how do I know what coefficients to look for, and what is the general construction of cohomology element assigned to $V$.
May 26, 2017 at 17:39	history	edited	Clay Cordova	CC BY-SA 3.0	edited body
May 26, 2017 at 17:32	history	edited	Clay Cordova	CC BY-SA 3.0	edited body
May 26, 2017 at 16:11	comment	added	Jim Humphreys		The questions look challenging. But it would be useful to clarify what you mean by "more general coefficients" and also to highlight your most basic question, since you formulate several. [Minor misprint: "their" should be "there".]
May 26, 2017 at 14:15	history	edited	Clay Cordova	CC BY-SA 3.0	deleted 1 character in body
May 26, 2017 at 0:21	history	asked	Clay Cordova	CC BY-SA 3.0