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Results tagged with reference-request
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user 750
This tag is used if a reference is needed in a paper or textbook on a specific result.
14
votes
Elementary $\mathrm{Ext}^1$ intuition
It seems like you already can see this, but $Ext^1(M,N)$ is measuring all the ways to form distinct short exact sequences $0\to N\to ?\to M\to 0$
If you are looking for intuition, what you should do i …
- 13k
6
votes
Good introductory references on algebraic stacks?
There was an MSRI summer school on stacks and deformation theory a few years ago. The video of all the talks are online, at the workshop's webpage. There are several copies of notes around, I believ …
- 13k