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zbMath0447.34057MaRDI QIDQ3892598

W. M. Greenlee

Publication date: 1979

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

zbMATH Keywords

Hilbert space Dirichlet problems asymptotic expansion for eigenvalues Newman problems positive definite self-adjoint operator singular perturbation of eigenvalues of semibounded operators

Mathematics Subject Classification ID

Perturbation theory of linear operators (47A55) Perturbations of ordinary differential equations (34D10) Perturbations, asymptotics of solutions to ordinary differential equations (34E10) Singular perturbations for ordinary differential equations (34E15) Asymptotic expansions of solutions to ordinary differential equations (34E05)

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