Prof. Gottfried Tinhofer

was staying in St.Petersburg from 15.05.1998 to 14.06.1998

           Application for participation in the EIMI program

                       TETE-A-TETE IN RUSSIA

I. Western participant(s)

  1) last name          Tinhofer
  2) given name(s)      Gottfried
  3) citizenship        Austrian
  4) degree, title(s)   Dr., Professor
  5) affiliation        Zentrum Mathematik, Technische Universitat Munchen
  6) position           Professor
  7) mailing address    Zentrum Mathematik, Technische Universitat,
                        D-80290 Munchen
  8) e-mail address
  9) phone number       ++47-89-289-28209
 10) FAX number         ++47-89-289-28228

 II. Russian participant(s)

   1) family name          Ponomarenko
   2) given name           Ilia
   3) patronymic           Nikolaevich
   4) degree, title(s)     k.f.m.n.
   5) affiliation          V.A.Steklov Institute of Mathematics at St. Petersburg
   6) position             nauchnyi sotrudnik
   7) mailing address      V.A.Steklov Institute of Mathematics, Fontanka 27,
                           191011, St.Petersburg, Russia
   8) e-mail address
   9) phone number         344-46-96
  10) FAX number

III. We intend to continue our cooperation (started in 1996) in studying
combinatorial compactness theory which goes back to Birkhoff's theorem
on doubly stochastic matrices. The notion of combinatorial compactness
enables us to state analogs of Birkhoff's theorem for graphs, cellular
algebras and permutation groups. The technique of the theory can be
used for constructing polynomial-time algorithms testing isomorphism
for some classes of graphs.

IV. Desired duration 30 days in the period from May 15, 1998 to June 14, 1998.