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Uniform asymptotic solution of second order linear differential equations without turning varieties

Uniform asymptotic solution of second order linear differential equations without turning varieties

The purpose of this paper is to initiate the study of a new kind of asymptotic series expansion for solutions of differential equations containing a parameter. We obtain uniform asymptotic solutions for certain equations of the form <disp-formula content-type="math/mathml"> \[ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="epsilon Superscript 2 n Baseline y equals a …