Issue 61A - Special issue in memoriam Pierre Leroux (1942-2008)

Preface

This issue is devoted to our dear Lotharingien PIERRE LEROUX whose untimely death on 9 March 2008 was a shock for all of us. It contains invited papers by friends and co-workers of his.

[B61Aa] Nantel Bergeron, Christophe Hohlweg, Carsten Lange and Hugh Thomas

Isometry Classes of Generalized Associahedra (13 pp.)

[B61Ab] Bruce E. Sagan

Probabilistic Proofs of Hook Length Formulas Involving Trees (10 pp.)

[B61Ac] Sylvain Lavallée and Christophe Reutenauer

Characteristic Polynomials of Nonnegative Integral Square Matrices and Clique Polynomials (11 pp.)

[B61Ad] Alan D. Sokal

A Ridiculously Simple and Explicit Implicit Function Theorem (21 pp.)

[B61Ae] Alexander D. Scott and Alan D. Sokal

Some Variants of the Exponential Formula, with Application to the Multivariate Tutte Polynomial (alias Potts Model) (33 pp.)

[B61Af] Amel Kaouche and Pierre Leroux

Mayer and Ree-Hoover Weights of Infinite Families of 2-Connected Graphs (28 pp.)

[B61Ag] Gilbert Labelle and Cédric Lamathe

General Combinatorial Differential Operators (24 pp.)