Relative Langlands duality and Koszul duality

Alexander Braverman, Michael Finkelberg, Roman Travkin

Consider a pair of $S$-dual hyperspherical varieties $G\circlearrowright X$ and $G^{\vee }\circlearrowright X^{\vee }$ equipped with equivariant quantizations $Q(X)$, $Q(X^{\vee })$. Assume…