{ "id": "2003.04738", "version": "v1", "published": "2020-03-06T13:14:33.000Z", "updated": "2020-03-06T13:14:33.000Z", "title": "EKOR strata on Shimura varieties with parahoric reduction", "authors": [ "Jens Hesse" ], "comment": "arXiv admin note: substantial text overlap with arXiv:2003.03175", "categories": [ "math.AG", "math.NT" ], "abstract": "We investigate the geometry of the special fiber of the integral model of a Shimura variety with parahoric level at a given prime place. To be more precise, we deal with the EKOR stratification which interpolates between the Ekedahl-Oort and Kottwitz-Rapoport stratifications. In the Siegel case we give a geometric description by suitably generalizing the theory of $G$-zips of Moonen, Wedhorn, Pink and Ziegler to our context.", "revisions": [ { "version": "v1", "updated": "2020-03-06T13:14:33.000Z" } ], "analyses": { "subjects": [ "14G35", "11G18", "14L05", "14D23", "14F40" ], "keywords": [ "shimura variety", "parahoric reduction", "ekor strata", "integral model", "parahoric level" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }