Jack Koolen's Home page

     Professional Experiences:
       1. 2003.03~2005.01 : Visiting Assistant Professor, KAIST, Daejon, Korea.
       2. 2002.01~2003.02 : Visiting Assistant Professor, Postech, Pohang, Korea
       3. 2001.08~2001.12 : Visiting Assistant Professor, University of Wisconsin, Madison, USA.
       4. 1999.11~2001.08 : Scientific Assistant at Bielefeld University.
       5. 1998.09~1999.09 : Scientific Assistant at Center for Mathematics and Computer Science, Amsterdam.

       6. 1995.04~1998.08 : Post doctoral fellow at Kyushu University, Bielefeld University Royal Institute of Technology, Sweden, Oxford University and Lisbon                                           University.

     Major Fields:
     1. Algebraic Combinatorics.
     2. Spectral Graph Theory
     3. Geometric Combinatorics

   Selected Papers: 

• Bang, S.; Hiraki, A.; Koolen, J. H. Delsarte clique graphs. European J. Combin. 28 (2007), no. 2, 501--516. 05C70

• van Dam, E. R.; Haemers, W. H.; Koolen, J. H.; Spence, E. Characterizing distance-regularity of graphs by the spectrum. J. Combin. Theory Ser. A 113 (2006), no. 8, 1805--1820

• Fujisaki, Tatsuya; Koolen, Jack H.; Tagami, Makoto Some properties of the twisted Grassmann graphs. Innov. Incidence Geom. 3 (2006), 81--87.

• Bandelt, Hans-Jürgen; Chepoi, Victor; Dress, Andreas; Koolen, Jack Combinatorics of lopsided sets. European J. Combin. 27 (2006), no. 5, 669--689

• Huber, K. T.; Koolen, J. H.; Moulton, V. On the structure of the tight-span of a totally split-decomposable metric. European J. Combin. 27 (2006), no. 3, 461--479.

   Workshop:

• PNU-POSTECH Algebraic Combinatorics Workshop
• Korea-Japan Workshop on Algebra and Combinatorics
• Discovering Patterns in Biology
• PMI Phylogenetic Combinatorics Seminar
• 2010 ALGEBRAIC AND GEOMETRIC COMBINATORICS CONFERENCE

  Papers:

• 2009