New answers tagged

9 votes
Accepted

A question regarding isomorphism in cohomology for moduli space of stable bundles over a compact Riemann surface

Things are actually simpler. View $\Gamma _n=H^1(X,\mathbb{Z}/n)$ as the group of line bundles $L\in \operatorname{Pic}^{0}(X) $ with $L^{{\tiny \otimes }n}=\mathscr{O}_X$. The map $N_0(n,k) \times \...
user avatar
  • 34.4k
0 votes

Models for computing cohomology of Lie groupoids

This is 2 years late, but since nobody has answered I'll give it a go. $1.$ I don't know the answer to this. $3.$ Yes, you can take cohomolgy of Lie groupoids with respect to sheaves, just like you ...
user avatar
2 votes
Accepted

Comparing cohomology of quotient by algebraic group and Borel subgroup

The spectral sequence degenerates on the second page since $X/B \to X/G$ is a smooth projective morphism (as $G/B$ is smooth projective) by a result of Deligne and Blanchard. The local systems are ...
user avatar
  • 115k
1 vote

Holomorphic vector fields acting on Dolbeault cohomology

Klemyatin proved that this action is trivial if the corresponding ${\Bbb C}$-flow is compatible with some metric (hence can be extended to a compact torus action), https://arxiv.org/abs/1909.04075, (N....
user avatar

Top 50 recent answers are included