Generic derivations on o-minimal structures Given an o-minimal theory, we define what is a derivation “compatible” with T. We show that the theory of compatible derivations has a model completion, and describe some of its properties.…
Eventi
Displaying the cohomology of toric line bundles – Klaus Altmann (Freie Universität Berlin)
Line bundles L on projective toric varieties can be understood as formal differences of convex polyhedra in the character lattice. We show how it is possible to use this language for understanding the cohomology of L by studying the set-theoretic…
Codimension two cycles and unramified third cohomology for certain products of two varieties – Jean-Louis Colliot-Thelene (Université de Paris-Saclay)
We investigate the integral Tate conjecture for 1-cycles on the product of a curve and a surface over a finite field, under the assumption that the surface is geometrically $\mathsf{CH}_0$-trivial. By this we mean that over any algebraically closed…
Embedding hyperbolic manifolds – Leone Slavich (Università di Pavia)
A complete hyperbolic n-manifold geodesically embeds if it realized a totally geodesic embedded hypersurface in an (n+1)-hyperbolic manifold. On one hand, we know no general obstruction to the fact that a hyperbolic manifold of dimension n>2 embeds,…
Polygonal billiards with contracting reflection laws – Gianluigi Del Magno (Università di Pisa)
The dynamics of billiards has been studied in great detail when the reflection law is the specular one, i.e., when the angle of reflection equals the angle of incidence. In this talk, I will be concerned with polygonal billiards with a contracting…