Sommaire

Decreasing subsequences in permutations and Wilf equivalence for involutions
p. 383-409
Algebraic shifting and basic constructions on simplicial complexes
p. 411-433
A local analysis of imprimitive symmetric graphs
p. 435-449
Cocommutative Hopf algebras of permutations and trees.
p. 451-470
On the Diaconis-Shahshahani method in random matrix theory
p. 471-491