Failure of the Hasse principle for Châtelet surfaces in characteristic $2$

However, by using algebraic groups and Galois cohomology, we are able in this paper to determine in général the Hasse invariant of the trace form of a central simple algebra..

half day. The workers want to offer everyone who comes a fair hearing and really personal attention, both of which would be incompatible with long and harassed

By using Hensel lemma and the fact that the quadratic equation has a real solution we can reduce to the following claim:..

Nous avons présenté une procédure simple pour déterminer, dans le cas d'un comportement élastoplas- tique parfait, la convergence acquise par une galerie au moment

In the last section, we give some formula to compute the Euler obstruction of a function f : X σ → C with isolated singularity at 0, and also for the difference between the

L’accès aux archives de la revue « Annales de la faculté des sciences de Toulouse » ( http://picard.ups-tlse.fr/~annales/ ) implique l’accord avec les conditions

2014 The Brauer-Manin obstruction for homogeneous spaces with connected or abelian stabilizer, J. für die reine und

Abstract. — We show that, over every number field, the degree four del Pezzo surfaces that violate the Hasse principle are Zariski dense in the moduli scheme... Résumé. — Nous