Topological A-models on seamed Riemann surfaces
Topological A-models on seamed Riemann surfaces
We define a class of topological A-models on a collection of Riemann surfaces, whose boundaries are sewn together along the seams.The target spaces for the Riemann surfaces are the Grassmannians Gr mi,n with the common value of n, and the boundary conditions at the seams demand that the spaces C …