Closure relations of Newton strata in Iwahori double cosets
Algebraic Geometry
2021-06-15 v1
Abstract
We consider the Newton stratification on Iwahori double cosets for a connected reductive group. We prove the existence of Newton strata whose closures cannot be expressed as a union of strata, and show how this is implied by the existence of non-equidimensional affine Deligne-Lusztig varieties. We also give an explicit example for a group of type .
Keywords
Cite
@article{arxiv.2106.07284,
title = {Closure relations of Newton strata in Iwahori double cosets},
author = {Stefania Trentin and Eva Viehmann},
journal= {arXiv preprint arXiv:2106.07284},
year = {2021}
}