The combinatorics seminar at KTH

Spring 2007

Feb 7 Svante Linusson, KTH Liftable valuations of polytopes
Feb 14 Michael Björklund and
Alexander Engström, KTH
Characterizations of totally nonnegative matrices and a proof of a conjecture of Björner
Feb 21 Sandra Di Rocco, KTH Discriminants and defect polytopes
Feb 28 Armen Asratian, Linköping On local-global phenomena in hamiltonian graphs
Mar 7 Olof Heden, KTH Perfect codes vs. full rank perfect codes
Mar 14 Henrik Eriksson, KTH Integraler, partitioner och MacMahons sats
Mar 23 Christian Krattenthaler, Vienna Growth diagrams, and increasing and decreasing chains in fillings of cell diagrams
Mar 28 Jakob Björnberg, Cambridge and KTH Random Poisson flows on graphs
Apr 11 Thomas Westerbäck, KTH Steiner triple systems and perfect codes
May 2 Alexander Engström, KTH A new subgraph counting identity
May 9 Aart Blokhuis, Eindhoven Do we know all 3-chromatic distance regular graphs?
May 16 Mark Goresky, IAS Princeton Subspace arrangements and equivariant cohomology
May 23 Petter Brändén, Michigan and KTH Negative dependence, log-concavity and zeros of polynomials

Upcoming and recent seminars

Past seminars

The combinatorics group in Stockholm