{
  "id": "1301.4585",
  "version": "v1",
  "published": "2013-01-19T18:54:18.000Z",
  "updated": "2013-01-19T18:54:18.000Z",
  "title": "Crossed Products and MF algebras",
  "authors": [
    "Weihua Li",
    "Stefanos Orfanos"
  ],
  "comment": "9 pages",
  "categories": [
    "math.OA"
  ],
  "abstract": "We prove that the crossed product AxG of a unital finitely generated MF algebra A by a discrete finitely generated amenable residually finite group G is an MF algebra, provided that the action is almost periodic. This generalizes a result of Hadwin and Shen. We also construct two examples of crossed product C*-algebras whose BDF Ext semigroups are not groups.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-01-19T18:54:18.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "46L05"
    ],
    "keywords": [
      "crossed product",
      "amenable residually finite group",
      "generated amenable residually finite",
      "finitely generated amenable",
      "unital finitely generated mf algebra"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013arXiv1301.4585L"
    }
  }
}