Issue 59

September 23 - 26, 2007, Centro Residenziale Universitario di Bertinoro

Preface

[B59a] Takayuki Hibi

Gröbner Basis Techniques in Algebraic Combinatorics (22 pp.)

[B59c] Céline Righi

Number of "udu"s of a Dyck Path and ad-Nilpotent Ideals of Parabolic Subalgebras of sl_l+1(C) (17 pp.)

[B59d] Chak-On Chow

Counting Multiderangements by Excedances (16 pp.)

[B59e] Olivier Bernardi

Solution to a Combinatorial Puzzle Arising from Mayer's Theory of Cluster Integrals (10 pp.)

[B59f] Jean-Christophe Aval

Keys and Alternating Sign Matrices (13 pp.)

[B59g] Olga Azenhas and Ricardo Mamede

Actions of the Symmetric Group Generated by Comparable Sets of Integers and Smith Invariants (27 pp.)