Wednesday afternoon was added to the programme to allow for enough time to those coming far from here. However, despite this extra afternoon, a poster session had to be included in the programme due to the large number of proposed talks. Participants were expected to arrive for dinner on Sunday and leave after breakfast on Thursday.
The Séminaire was dedicated to the memory of Pierre LEROUX (1942-2008). In particular, the Tuesday afternoon session was reserved for talks given by some of his closest friends, namely Gilbert Labelle, Amel Kaouche, Nantel Bergeron, and Xavier Viennot. It was chaired by another of his closest friends, Srecko Brlek. After dinner, Christian Krattenthaler marvelled us with a piano recital, where he played the Sonata in F major, K 332, by Wolfgang Amadeus Mozart and the Sonata in A major, D 959, by Franz Schubert.
The two series of main lectures were given by
We are grateful to CMUC (Centre for Mathematics of University of Coimbra), CELC (Centro de Estruturas Lineares e Combinatórias), CMUP (Centro de Matemática da Universidade do Porto), FCT (Fundação para a Ciência e a Tecnologia), for their substantial financial support; and to the Department of Mathematics, Faculty of Science and Technology, University of Coimbra, for the generous organisational support.
Finally, we wish to thank both the speakers and the authors of the posters presented, all those who proposed talks but by various reasons could not come, and all the participants, who, together, made this edition of the Séminaire a significant success.
Carlos ANDRÉ: Combinatorial aspects of supercharacter theories of unitriangular groups
Nantel BERGERON: Isometry classes of generalized associahedra
Emmanuel BRIAND: Piecewise quasipolynomial formulas for Kronecker coefficients indexed by two-row shapes
Glória CRAVO: Logical termination of workflows: an interdisciplinary approach
Mark DUKES: Permutations, (2+2)-free posets, and ascent sequences
Guo-Niu HAN: A promenade in the garden of hook length formulas
Matthieu JOSUAT-VERGÈS: Rook placements in Young diagrams
Amel KAOUCHE: Invariants de graphes liés aux gaz imparfaits
Roman KÖNIG: Some remarks on partition lattices
Christoph KOUTSCHAN: Proof of Ira Gessel's lattice path conjecture
Gilbert LABELLE: General combinatorial differential operators
Ana Filipa LOUREIRO: Inverse relations between powers of Bochner's operator and a differential operator of any even order
István MEZÖ: r-Stirling numbers, Whitney numbers, and their common generalization
Yuval ROICHMAN: Flag orders
Ilda PEREZ DA SILVA: Orientability of cubes
Heesung SHIN: Forests and parking functions
Xavier VIENNOT: Hommage à mon ami Pierre Leroux, Alternative tableaux, permutations, a Robinson-Schensted like bijection, and the asymmetric exclusion process in physics
Jiang ZENG: Combinatorics of q-Charlier and q-Laguerre polynomials
Federico INCITTI: Kazhdan-Lusztig polynomials, rooted partitions and quasi-minuscule quotients
Mercedes ROSAS: Nilpotent matrices and a counterexample to a conjecture of Weyman
Christian STUMP: Non-crossing partitions, non-nesting partitions and Coxeter sortable elements in types A and B