{
  "id": "0706.1954",
  "version": "v1",
  "published": "2007-06-13T17:15:06.000Z",
  "updated": "2007-06-13T17:15:06.000Z",
  "title": "SPM Bulletin 21",
  "authors": [
    "Boaz Tsaban"
  ],
  "categories": [
    "math.GN",
    "math.CO",
    "math.LO"
  ],
  "abstract": "Contents: 1. Editor's note; 2. Personal impressions from the SPM07 meeting; 3. Research announcements; 3.1. Coloring ordinals by reals; 3.2. Long Borel Hierarchies; 3.3. Rothberger's property in finite powers; 3.4. Special subsets of the reals and tree forcing notions; 3.5. All automorphisms of the Calkin algebra are inner; 3.6. Continuous selections and sigma-spaces; 3.7. On the closure of the diagonal of a T1-space; 3.8. Splitting families and Noetherian type; 3.9. Even more simple cardinal invariants; 3.10. A classification of CO spaces which are continuous images of compact ordered spaces; 4. Problem of the Issue",
  "revisions": [
    {
      "version": "v1",
      "updated": "2007-06-13T17:15:06.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "spm bulletin",
      "simple cardinal invariants",
      "long borel hierarchies",
      "editors note",
      "tree forcing notions"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2007arXiv0706.1954T"
    }
  }
}