Orateur
Olivier Benoist
(ENS, CNRS)
Description
The first counterexamples to the integral Hodge conjecture,
due to Atiyah and Hirzebruch, exploit the action of Steenrod operations.
In this talk, we will further study the interaction of Steenrod
operations and algebraic classes, over arbitrary fields, and we will
derive new examples of non-algebraic cohomology classes.
