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May 23, 2010 at 4:26 history edited Torsten Ekedahl CC BY-SA 2.5
Corrected also my incorrect correction.
May 23, 2010 at 4:12 history edited Torsten Ekedahl CC BY-SA 2.5
Typo and comment on origin of exact sequence.; deleted 2 characters in body
May 22, 2010 at 20:27 comment added TonyS Yes, i think it is supposed to be "stalks". But I have one last question: Does this long exact sequence come from the local-to-global spectral sequence? Doesn't this sequence look like this: $0 \rightarrow H^1(\mathcal{H}om(M,M) \rightarrow Ext_R^1(M,M) \rightarrow H^0(\mathxcal{E}xt_R^1(M,M)) \rightarrow\ldots$ so we only need vanishing of $Ext_{R_x}^1(M_x,M_x)$ or am I missing something?
May 22, 2010 at 16:01 comment added Charles Staats Is "stacks" supposed to be "stalks"?
May 22, 2010 at 13:10 comment added TonyS Thank you, this is an easy counterexample and answers my second question.
May 22, 2010 at 13:10 vote accept TonyS
May 22, 2010 at 17:00
May 22, 2010 at 11:59 history answered Torsten Ekedahl CC BY-SA 2.5