### Formes quadratiques et cycles algébriques [d'après Rost, Voevodsky, Vishik, Karpenko...], by Bruno Kahn

This is a Bourbaki talk (in French) about recent advances on quadratic
forms obtained using algebraic cycles modulo 2 and the action of Steenrod
operations on them. These techniques are inspired by the methods of Rost
and Voevodsky that led to the proof of the Milnor conjecture but are much
more elementary, using neither triangulated motives not the homotopy
theory of schemes.

Bruno Kahn <kahn@math.jussieu.fr>