Gevrey Asymptotic Representation of the Solutions of Equations with One Turning Point

DOI10.1002/MANA.19971830117zbMath0866.34049OpenAlexW1976680768MaRDI QIDQ3124258

Karen Yagdjian

Publication date: 30 July 1997

Published in: Mathematische Nachrichten (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1002/mana.19971830117

zbMATH Keywords

asymptotic solutionsturning point

Mathematics Subject Classification ID

Singular perturbations, turning point theory, WKB methods for ordinary differential equations (34E20) Initial value problems for higher-order hyperbolic equations (35L30) General theory for ordinary differential equations (34A99)

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A generalized Levi condition for weakly hyperbolic Cauchy problems with coefficients low regular in time and smooth in space ⋮ Exponential function of pseudo-differential operators in Gevrey spaces ⋮ On a sharp Levi condition in Gevrey classes for some infinitely degenerate hyperbolic equations and its necessity

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