Finiteness Questions for Étale Coverings with Bounded Wild Ramification at the Boundary
De Vasudevan Srinivas
Donaldson-Thomas Invariants: Classical, Motivic, Quadratic and Real
De Marc Levine
Apparaît dans les collections : Research School, Méthodes géométriques et analytiques pour les points rationnels / Geometric and Analytic Methods for Rational Points
Hasse proved that for quadrics the existence of rational points reduces to the existence of solutions over local fields. In many cases, cohomological constructions provide obstructions to such a local to global principle. The objective of these lectures is to give an introduction to these cohomological tools.