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The central connection problem at turning points of linear differential equations. (English) Zbl 0218.34010
Analytic Theory diff. Equat., Proc. Conf. Western Michigan Univ., Kalamazoo 1970, Lect. Notes Math. 183, 158-164 (1971).
34A30 Linear ordinary differential equations and systems, general
34C05 Topological structure of integral curves, singular points, limit cycles of ordinary differential equations
34A30 34C05