Explicit evaluation of the $q$-Stokes matrices for certain confluent hypergeometric $q$-difference equations

Abstract

We prove a connection formula for the basic hypergeomtric function ${}_n\ddot{I}{†}_{n-1}\left(a_1,...,a_{n-1},0;b_1,...,b_{n-1};q,z\right)$ by using the $q$-Borel resummation. As an application, we compute $q$-Stokes matrices of a special confluent hypergeometric $q$-difference system with an irregular singularity. We show that by letting $q\to 1$, the $q$-Stokes matrices recover the known expressions of the Stokes matrices of the corresponding confluent hypergeometric differential system.

28 pages. All comments are welcome