Yann Rollin (Nantes University) will speak in the geometry seminar on Tuesday 18 February 2020 at 11am in the Salle de Profs. Yann’s title is Construction of polyhedral Lagrangian surfaces and moment maps and his abstract is below.
Lagrangian surfaces are important objects in symplectic topology. However polyhedral aspects of symplectic geometry are far from being understood.
I will present several methods for constructing polyhedral Lagrangian surfaces in R^4 and more generally isotropic polyhedral surfaces in higher dimensions, that stem from moment map interpretations of the problem.