Timeline for Objects of a category of homological dimension 1 is a smooth stack?
Current License: CC BY-SA 3.0
3 events
| when toggle format | what | by | license | comment | |
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| Sep 11, 2016 at 21:15 | comment | added | André Henriques | I would be very interested to see an elaboration of the statement "infinitesimal deformations of $M$ are given by $Ext^1(M,M)$". For example, in the category of $\mathbb Z$-modules, we have $Ext^1(\mathbb Z/2,\mathbb Z/2)=\mathbb Z/2$". What are the corresponding infinitesimal deformations of $\mathbb Z/2$? If I'm not allowed to take the category of $\mathbb Z$-modules as an example, then I would like to understand which categories I'm allowed to consider. | |
| Sep 11, 2016 at 19:34 | comment | added | Elle Najt | Thanks. I only vaguely understand your answer, however. Do you know of a reference where this might be explained in more detail? | |
| Sep 11, 2016 at 18:49 | history | answered | user25309 | CC BY-SA 3.0 |