Conformal blocks in the tensor product of vector representations and localization formulas
Using equivariant localization formulas we give a formula for conformal blocks at level one on the sphere as suitable polynomials.
Contractions of Lie algebras and algebraic groups
Degenerations, contractions and deformations of various algebraic structures play an important role in mathematics and physics. There are many different definitions and special cases of these notions. We try to give a general definition which unifies these notions and shows the connections among them. Here we focus on contractions of Lie algebras and algebraic groups.