Geodesic

Sommaire du Fascicule no. 1

Introduction for the special issue in memory of Manfred Schocker
p. 1-2
Trees, set compositions and the twisted descent algebra
p. 3-23
An unpublished theorem of Manfred Schocker and the Patras-Reutenauer algebra
p. 25-42
Primitive elements in the matroid-minor Hopf algebra
p. 43-64
Commutative combinatorial Hopf algebras.
p. 65-95
Coassociative magmatic bialgebras and the Fine numbers.
p. 97-114
The Hopf algebra of uniform block permutations.
p. 115-138
Schur positivity of skew Schur function differences and applications to ribbons and Schubert classes
p. 139-167
Lie powers and Witt vectors
p. 169-187
On fixed points of permutations.
p. 189-218
On the decomposition map for symmetric groups.
p. 219-229
Radical of weakly ordered semigroup algebras.
p. 231-234

Sommaire du Fascicule no. 2

A noncommutative symmetric system over the Grossman-Larson Hopf algebra of labeled rooted trees
p. 235-260
On automorphism groups of quasiprimitive 2-arc transitive graphs
p. 261-270
Schemes and the iP-graph
p. 271-279
Specht filtrations and tensor spaces for the Brauer algebra.
p. 281-312
Twisted identities in Coxeter groups.
p. 313-332

Sommaire du Fascicule no. 3

On Weyl-Heisenberg orbits of equiangular lines
p. 333-349
Universal families of permutation groups.
p. 351-363
On quartic half-arc-transitive metacirculants
p. 365-395
Leonard triples and hypercubes
p. 397-424
Specializations of Ferrers ideals
p. 425-437

Sommaire du Fascicule no. 4

A combinatorial proof of a Weyl type formula for hook Schur polynomials
p. 439-459
Puzzles, tableaux, and mosaics
p. 461-480
Extended affine Weyl groups of type $A_1$.
p. 481-493
Necessary conditions for Schur-positivity
p. 495-507
Pseudo 1-homogeneous distance-regular graphs
p. 509-529
Algebraic curves and maximal arcs
p. 531-544