Timeline for Quotient of a finite morphism by an action of a reductive group is still finite?
Current License: CC BY-SA 3.0
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| May 16, 2018 at 21:08 | comment | added | Ariyan Javanpeykar | What is the pull-back of the $G$-torsor $Y\to Y/G$ along $X/G\to Y/G$? (Hint: It is a $G$-torsor over $X/G$ with a $G$-equivariant map to $Y$...) Now, if $X\to S$ is a finitely presented morphism of algebraic stacks and $T\to S$ is fppf, then $X\to S$ is finite IFF $X_T\to T$ is finite. Or am I wrong? | |
| Apr 26, 2018 at 21:14 | review | First posts | |||
| Apr 26, 2018 at 21:26 | |||||
| Apr 26, 2018 at 21:12 | history | asked | Vas | CC BY-SA 3.0 |