scientific article; zbMATH DE number 1234701

zbMath0914.34005MaRDI QIDQ4221456

Sobhy El-Sayed Ibrahim

Publication date: 16 June 1999

Full work available at URL: https://eudml.org/doc/30532

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

complex coefficientsquasi-derivatives\(n\)th ordergeneral quasi-differential equations

Mathematics Subject Classification ID

Weyl theory and its generalizations for ordinary differential equations (34B20) Perturbation theory of linear operators (47A55) General theory of ordinary differential operators (47E05) Explicit solutions, first integrals of ordinary differential equations (34A05) Growth and boundedness of solutions to ordinary differential equations (34C11) Linear differential equations in abstract spaces (34G10) Perturbations, asymptotics of solutions to ordinary differential equations (34E10) Ordinary differential equations in the complex domain (34M99) Singular perturbations for ordinary differential equations (34E15)

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