Singular supports for character sheaves on a group compactification. (Q2427025)

Let \(G\) be a semi-simple group of adjoint type over an algebraically closed field of characteristic zero. Let \(X\) be its De Concini-Procesi completion, also known as the wonderful compactification. Using a moment map the authors define a Lagrangian subvariety of the cotangent bundle \(T^*X\) and show that it contains the singular support of any character sheaf.