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Questions about the branch of algebra that deals with groups.

2 votes
1 answer
196 views

How to conclude the quasi-projective case of the derived McKay correspondence from the proje...

I am currently trying to understand the paper "Mukai implies McKay" from Bridgeland, King and Reid (cf. here). Let me sum up the setting we find ourselves in: Let $M$ be a smooth quasi-projective vari …
2 votes
0 answers
132 views

Does every faithful action on a scheme act freely on a dense open subset?

Disclaimer: I have asked this question on math exchange a week ago (here), but sadly to no avail. So I decided to escalate my question: Let $G$ be a finite group acting faithfully on a smooth quasi-pr …