{
  "id": "1201.2571",
  "version": "v1",
  "published": "2012-01-12T14:13:39.000Z",
  "updated": "2012-01-12T14:13:39.000Z",
  "title": "Basic Subtoposes of the Effective Topos",
  "authors": [
    "Sori Lee",
    "Jaap van Oosten"
  ],
  "comment": "26 pages",
  "categories": [
    "math.LO"
  ],
  "abstract": "We employ a new tool (sights) to investigate local operators in the Effective Topos. A number of new such local operators is analyzed using this machinery. Moreover, we investigate a local operator defined in the thesis of A. Pitts, and establish that its corresponding subtopos satisfies true arithmetic.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-01-12T14:13:39.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "03D28",
      "18B25"
    ],
    "keywords": [
      "effective topos",
      "basic subtoposes",
      "corresponding subtopos satisfies true arithmetic",
      "local operator"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 26,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}