Nonabelian stable envelopes, vertex functions with descendents, and integral solutions of -difference equations
arXiv:2010.13217
Abstract
We generalize the construction of elliptic stable envelopes to actions of connected reductive groups and give a direct inductive proof of their existence and uniqueness in a rather general situation. We show these have powerful enumerative applications, in particular, to the computation of vertex functions and their monodromy.