A $\lambda$-adic family of Funke-Millson cycles and a $\lambda$-adic Funke-Millson lift
By Paul Kiefer
Modularity of special cycles in orthogonal and unitary Shimura varieties
By Salim Tayou
Appears in collection : Model theory of valued fields / Théorie des modèles des corps valués
I will be speaking of an application of Berkovich spaces to questions related to the existence of rational points on varieties. More precisely, several local-global principles applicable to quadratic forms will be presented, all of them obtained by working over Berkovich analytic curves. The main tool I employ is an adaptation of the so called patching technique, which has lately become an important method for the study of such questions.