Matings, holomorphic correspondences, and a Bers slice

Abstract

There are two frameworks for mating Kleinian groups with rational maps on the Riemann sphere: the algebraic correspondence framework due to Bullett-Penrose-Lomonaco \cite{BP94,BL20} and the simultaneous uniformization mating framework of \cite{MM23a}. The current paper unifies and generalizes these two frameworks. To achieve this, we extend the mating framework of \cite{MM23a} to genus zero hyperbolic orbifolds with at most one orbifold point of order $\nu \geq 3$ and at most one orbifold point of order two. We give an explicit description of the resulting conformal matings in terms of uniformizing rational maps. Using these rational maps, we construct correspondences that are matings of such hyperbolic orbifold groups (including punctured spheres and Hecke groups) with polynomials in real-symmetric hyperbolic components. We also define an algebraic parameter space of correspondences and construct an analog of a Bers slice of the above orbifolds in this parameter space.