Seminar in Real and Complex Geometry

Thursday, November 26, 2020, 16:00-17:30, online (via zoom)




Michele Ancona
(Tel Aviv University)

Exponential rarefaction of maximal hypersurfaces


Abstract
             

Smith-Thom's inequality tells us that the sum of Betti numbers of the real locus of a real algebraic variety is always smaller than or equal to the sum of Betti numbers of its complex locus. In the case of equality, the real algebraic variety is called maximal. Given a real holomorphic line bundle L over a real algebraic variety X, I will prove that the probability that a real holomorphic section of L^d defines a maximal hypersurface tends to 0 exponentially fast when d tends to infinity.