{
  "id": "2107.08085",
  "version": "v1",
  "published": "2021-07-16T19:18:20.000Z",
  "updated": "2021-07-16T19:18:20.000Z",
  "title": "Almost invariant subspaces and operators",
  "authors": [
    "David Kazhdan",
    "Alexander Polishchuk"
  ],
  "comment": "7 pages",
  "categories": [
    "math.RT",
    "math.AG"
  ],
  "abstract": "We give an elementary proof of an efficient version of the Wagner's theorem on almost invariant subspaces and deduce some consequences in the context of Galois extensions.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-07-16T19:18:20.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "invariant subspaces",
      "elementary proof",
      "efficient version",
      "wagners theorem"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}