Sommaire du Fascicule no. 1

The subconstituent algebra of a strongly regular graph
p. 5-38
Tight Gaussian 4-designs
p. 39-63
Matrices of formal power series associated to binomial posets
p. 65-104
Cycle action on treelike structures.
p. 105-114
Generalized exponents and forms
p. 115-132

Sommaire du Fascicule no. 2

On semi-pseudo-ovoids
p. 139-149
Row and column removal theorems for homomorphisms of Specht modules and Weyl modules.
p. 151-179
A ring theoretic construction of Hadamard difference sets in $\Bbb Z^n_8 \times \Bbb Z^n_2$
p. 181-187
The tropical totally positive Grassmannians
p. 189-210
Modular data: the algebraic combinatorics of conformal field theory
p. 211-250

Sommaire du Fascicule no. 3

A new proof of Bartholdi's theorem
p. 259-271
On multiplicities of points on Schubert varieties in Grassmannians. II
p. 273-288
Distributive lattices, bipartite graphs and Alexander duality
p. 289-302
A quantum version of the Désarménien matrix.
p. 303-316
Covers of point-hyperplane graphs
p. 317-329
Counting monomials
p. 331-341
Cyclic descents and $P$-partitions.
p. 343-375

Sommaire du Fascicule no. 4

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