{
  "id": "math/9606229",
  "version": "v1",
  "published": "1996-06-15T00:00:00.000Z",
  "updated": "1996-06-15T00:00:00.000Z",
  "title": "Existence of almost free abelian groups and reflection of stationary set",
  "authors": [
    "Saharon Shelah"
  ],
  "journal": "Math. Japon. 45 (1997), 1--14",
  "categories": [
    "math.LO",
    "math.RA"
  ],
  "abstract": "section 2: We answer a question of Mekler Eklof on the closure operations of the incompactness spectrum. We answer a question of Foreman and Magidor on reflection of stationary subsets of S_{< aleph_2}(lambda) = {a subseteq lambda : |a| < aleph_2}]. section 3 - NPT is not transitive. We prove NPT(lambda, mu) + NPT(mu, kappa) not => NPT(lambda, kappa)",
  "revisions": [
    {
      "version": "v1",
      "updated": "1996-06-15T00:00:00.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "free abelian groups",
      "stationary set",
      "reflection",
      "stationary subsets",
      "incompactness spectrum"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "1996math......6229S"
    }
  }
}