Homotopy types of toric orbifolds from Weyl polytopes
Speaker:
Tao Gong, Western University
Date and Time:
Tuesday, August 20, 2024 - 1:40pm to 2:10pm
Location:
Fields Institute, Room 230
Abstract:
Given a reduced crystallographic root system with a fixed simple system, it is associated to a Weyl group $W$, parabolic subgroups $W_K$'s and a polytope $P$ which is the convex hull of the $W$-orbit of a dominant weight. The quotient $P/W_K$ can be identified with a polytope. Polytopes $P$ and $P/W_K$ are associated to toric varieties $X_P$ and $X_{P/W_K}$ respectively. It turns out the underlying topological spaces $X_P/W_K$ and $X_{P/W_K}$ are homotopy equivalent, when considering the polytopes in the real span of the root lattice.