On the multisummability of WKB solutions of certain singularly perturbed linear ordinary differential equations

Abstract

Using two concrete examples, we discuss the multisummability of WKB solutions of singularly perturbed linear ordinary differential equations. Integral representations of solutions and a criterion for the multisummability based on the Cauchy-Heine transform play an important role in the proof.

Keywords

• exact WKB analysis
• WKB solution
• multisummability