Operator analogs of WKB-type estimates and the solvability of boundary- value problems

zbMath0793.34042MaRDI QIDQ1311135

S. L. Ehdel'shtejn

Publication date: 8 February 1994

Published in: Mathematical Notes (Search for Journal in Brave)

zbMATH Keywords

existenceboundary-value problemBanach spaceoperator functionspectracontraction semigroupsunique bounded solutionestimation for the Green's function

Mathematics Subject Classification ID

Singular perturbations, turning point theory, WKB methods for ordinary differential equations (34E20) Linear differential equations in abstract spaces (34G10) Linear boundary value problems for ordinary differential equations (34B05)

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