Alex Hellsten

Office contact info (phone etc) at the website of the Finnish Matriculation Examination Board where I currently work can be found in finnish and in swedish.

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I used to work at the University of Helsinki in the Department of Mathematics and Statistics and did some research in the field of set theory.

Publications

• Potential isomorphism and semi-proper trees. Joint with Tapani Hyttinen and Saharon Shelah. Fundamenta Mathematicae, 175:127-142, 2002.
  • Abstract
  • Preprint [dvi] [pdf] [ps] (301 in the departments report series)
  • math.LO/0112288 in ArXiv
  • MR1969631 (2004e:03079), Zbl 1013.03039
• Diamonds on large cardinals. Annales Academiae Scientiarum Fennicae Mathematica Dissertationes, 134, 48 pp., 2003.
  • Full text [dvi] [pdf] [ps]
  • MR2026390 (2004j:03054), Zbl 1038.03051
  • ISBN 951-41-0929-5
• Orders of indescribable sets. Archive for Mathematical Logic, 45:705-714, 2006.
  • Abstract
  • Full text (manuscript) [dvi] [pdf] [ps]
  • The original publication is available at www.springerlink.com
  • MR2252250, Zbl 1099.03043
• Saturation of the weakly compact ideal. Proceedings of the American Mathematical Society, 138: 3323-3334, 2010.
  • Abstract
  • Article online
• Diamond on the regulars versus weakly compact diamond. In preparation.

My PhD thesis of 2003 consists of the first two publications and a short introduction.

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URL pointing to this page: http://www.iki.fi/alex.hellsten