Connected components of closed affine Deligne-Lusztig varieties in affine Grassmannians
arXiv:1511.04677
Abstract
We determine the set of connected components of closed affine Deligne-Lusztig varieties for hyperspecial maximal parahoric subgroups of unramified connected reductive groups. This extends the work by Viehmann for split reductive groups, and the work by Chen-Kisin-Viehmann on minuscule affine Deligne-Lusztig varieties.
43 pages