Shatalov-Sternin's construction of complex WKB solutions -- a comment on geometric issues.
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Submission date: 17. Jul. 2009
Keywords and phrases: WKB, resurgence
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We study Shatalov-Sternin's proof of existence of resurgent solutions of a linear ODE and discuss the construction of analytic continuation to a common ``Riemann surface'' of all terms of the von Neumann series appearing in their proof. We give a detailed proof of a more modest statement in a special situation.