Teaching
Autumn 2009:
SF1611
Introduktionskurs i matematik
SF1625
Envariabelanalys
Spring 2010:
FSF3701 Coxeter groups
Useful links
The combinatorics group at KTH
Our seminars
Festive combinatorics
2008, a symposium celebrating Anders Björner's 60th
birthday
The Björner
Festschrift
Preprints and publications
Criteria for rational smoothness
of some symmetric orbit closures,
preprint 2009.
The topology of the space of
matrices of Barvinok rank two,
with J. Jonsson, to appear in Beiträge zur Algebra und Geometrie.
Pattern avoidance and Boolean
elements in the Bruhat order on involutions,
with K. Vorwerk, Journal of Algebraic
Combinatorics 30 (2009), 87–102.
From Bruhat intervals to
intersection lattices and a conjecture of Postnikov,
with S. Linusson, J. Shareshian and J. Sjöstrand,
Journal of
Combinatorial Theory, Series A 116 (2009), 564–580.
Fixed points of zircon automorphisms,
Order 25 (2008), 85–90.
Twisted identities in Coxeter groups,
Journal of Algebraic Combinatorics 28 (2008), 313–332.
The finite antichain property in Coxeter groups,
Arkiv för matematik 45 (2007), 61–69.
Link complexes of subspace arrangements,
European Journal of Combinatorics 28 (2007), 781–790.
The topology of spaces of
phylogenetic trees with symmetry,
Discrete Mathematics 307 (2007), 1825–1832.
The combinatorics of
twisted involutions in Coxeter groups,
Transactions of the American Mathematical Society 359
(2007), 2787–2798.
Fixed points of involutive
automorphisms of the Bruhat order,
Advances in Mathematics 195 (2005), 283–296.
Expected reflection distance in G(r,1,n) after a fixed number of reflections,
with N. Eriksen, Annals of Combinatorics 9 (2005), 21–33.
Directed subgraph complexes,
Electronic Journal of Combinatorics 11(1) (2004), R75.
A note on blockers in posets,
with A. Björner, Annals of Combinatorics 8 (2004), 123–131.
Estimating the expected reversal distance after a fixed number of
reversals,
with N. Eriksen, Advances in Applied Mathematics
32 (2004), 439–453.
Bruhat intervals of length 4 in Weyl groups,
Journal of Combinatorial Theory, Series A 102 (2003), 163–178.
Polygraph arrangements,
European Journal of Combinatorics 23 (2002), 937–948.
Quotient complexes and lexicographic shellability,
Journal of Algebraic Combinatorics 16 (2002), 83–96.
Lard. The answer. The
ointment. The dancer.
|