abstract: In Part I, we talk about the transformation of a Schrödinger equation with a merging pair of a simple pole and a simple turning point (an MPPT equation, for short) to its canonical form and some properties of its WKB solutions.
This is a joint work with T. Kawai (Kyoto univ.), T. Koike (Kobe univ.) and Y. Takei (Kyoto univ.).