Philippe Cassou-Noguès

Hasse-Witt invariants of symmetric complexes: an example from geometry

Abstract Jardine has defined Hasse–Witt invariants for symmetric bundles over schemes. This definition can be extended to symmetric complexes, that is symmetric objects in the derived category of bounded complexes of vector bundles over a scheme. In this Note we show how one can use these generalized invariants to give a neater proof of a comparison result on Hasse–Witt invariants of symmetric bundles attached to tame coverings of schemes. To cite this article: P. Cassou-Nogues et al., C. R. Acad. Sci. Paris, Ser. I 334 (2002) 839–842.

The classifying topos of a group scheme and invariants of symmetric bundles

Let

Galois module structure and Jacobians of Fermat curves

Y

On the trace form of Galois algebras: ON THE TRACE FORM OF GALOIS ALGEBRAS

be a scheme in which 2 is invertible and let

Derived category invariants and L-series

V

Constante de l'équation fonctionnelle de la fonction

be a rank

L

n

d'Artin d'une représentation symplectique et modérée

vector bundle on

Parité du nombre de classes desS4-extensions de Q et courbes elliptiques

Y

Structures galoisiennes et courbes elliptiques

endowed with a non-degenerate symmetric bilinear form