Sommaire du Fascicule no. 1

Kloosterman sums and monodromy of a p-adic hypergeometric equation
On the field of definition of superspecial polarized abelian varieties and type numbers
A problem of D. H. Lehmer and its generalization (II)
Factorisation de certains morphismes birationnels
Isotropic characteristic classes
General elephants of ℚ-Fano 3-folds

Sommaire du Fascicule no. 2

Inversion techniques and combinatorial identities. Strange evaluations of basic hypergeometric series
Convolution L-series
The rationality of the moduli space of Enriques surfaces
Arithmetical investigations of a certain infinite product
The Yang-Baxter and pentagon equation

Sommaire du Fascicule no. 3

K 2 of Fermat curves with divisorial support at infinity
Linear forms in p-adic logarithms. III
Homology Hopf surfaces
On the Betti numbers of perfect ideals
Localization of epimorphisms and monomorphisms in homotopy theory
Birational morphisms of regular schemes