English

On sheaf cohomology for supergroups arising from simple classical Lie superalgebras

Representation Theory 2022-03-08 v1

Abstract

In this paper the authors study the behavior of the sheaf cohomology functors RindBG()R^{\bullet}\text{ind}_{B}^{G}(-) where GG is an algebraic group scheme corresponding to a simple classical Lie superalgebra and BB is a BBW parabolic subgroup as defined by D. Grantcharov, N. Grantcharov, Nakano and Wu. We provide a systematic treatment that allows us to study the behavior of these cohomology groups RindBGLf(λ)R^{\bullet}\text{ind}_{B}^{G}L_{\mathfrak f}(\lambda) where Lf(λ)L_{\mathfrak f}(\lambda) is an irreducible representation for the detecting subalgebra f{\mathfrak f}. In particular, we prove an analog of Kempf's vanishing theorem and the Bott-Borel-Weil theorem for large weights.

Keywords

Cite

@article{arxiv.2203.02775,
  title  = {On sheaf cohomology for supergroups arising from simple classical Lie superalgebras},
  author = {David M. Galban and Daniel K. Nakano},
  journal= {arXiv preprint arXiv:2203.02775},
  year   = {2022}
}