{ "id": "2408.13861", "version": "v1", "published": "2024-08-25T15:18:15.000Z", "updated": "2024-08-25T15:18:15.000Z", "title": "Topological rigidity of closures of certain sparse unipotent orbits in finite-volume quotients of $\\prod_{i=1}^k\\operatorname{SL}_2(\\mathbb R)$", "authors": [ "Cheng Zheng" ], "comment": "18 pages", "categories": [ "math.DS" ], "abstract": "We give a simple proof about the topological rigidity of closures of certain sparse unipotent orbits in $G/\\Gamma$ where $G=\\prod_{i=1}^k\\operatorname{SL}_2(\\mathbb R)$ and $\\Gamma$ is an irreducible lattice in $G$.", "revisions": [ { "version": "v1", "updated": "2024-08-25T15:18:15.000Z" } ], "analyses": { "subjects": [ "37A17", "11J99" ], "keywords": [ "sparse unipotent orbits", "topological rigidity", "finite-volume quotients", "simple proof" ], "note": { "typesetting": "TeX", "pages": 18, "language": "en", "license": "arXiv", "status": "editable" } } }