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

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

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

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