Vortrag von Dr. Olivier Benoist
Sprecher eingeladen von: Prof. Dr. Joseph Ayoub
Datum: 07.11.23 Zeit: 13.15 - 14.45 Raum: Y27H25
I will prove that the field of meromorphic functions on a Stein compact set of dimension n (for instance on the closed unit ball in C^n) has cohomological dimension n. The main tool is an extension to the Stein setting of Artin’s theorem comparing étale and singular cohomology. I will give applications of these results to sums of squares problems in analytic geometry.