74 citations · 89 across the 9 of their papers we have counts for
5 papers · 1 filter
Recoller pour séparer
Daniel Ferrand, Bruno Kahn
We introduce the notion of a separator for a morphism of schemes f:T\to S; in particular, it is universal among morphisms from T to separated S-schemes. A separator is a local isom…
Motifs et adjoints
Bruno Kahn
We show in many cases the existence of adjoints to extension of scalars on categories of motivic nature, in the framework of field extensions. This is to be contrasted with the mor…
Cycles de codimension 2 et H^3 non ramifié pour les variétés sur les corps finis
Jean-Louis Colliot-Thélène, Bruno Kahn
Let be a smooth projective variety over a finite field $\F$. We discuss the unramified cohomology group $H^3_\nr(X,\Q/\Z(2))$. Several conjectures put together imply that this…
Démonstration géométrique du théorème de Lang-Néron
Bruno Kahn
We give a proof without heights of the Lang-Néron theorem: if is a regular extension of finite type and is an abelian -variety, the group $A(K)/\Tr_{K/k} A(k)$ is fini…
Equivalence rationnelle, equivalence numerique et produits de courbes elliptiques sur un corps fini
Bruno Kahn
This is an update of the first version. We clarify that the main results apply to more general smooth projective varieties X than products of elliptic curves (briefly: X is of "abe…