Speaker:Paolo CasciniImperial College, LondonTime:Wed.& Fri., 9:50-11:25 amJuly 2-July 11, Aug. 27-Sept. 26, 2025Venue:B725, Shuangqing Complex Building ADescription:In this course, we will explore the birational geometry of foliations on complex varieties and in positive characteristic. We will begin with the theory of foliations on complex algebraic surfaces, introducing key concepts and ...
AbstractIn this talk, I will consider isomorphisms of Bergman fans of matroids. Motivated by algebraic geometry, these isomorphisms can be considered as matroid analogs of birational maps. I will introduce Cremona automorphisms of the coarsest fan structure. These produce a class of automorphisms which do not come from automorphisms of the underlying matroid. I will then explain that the automo...