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zbMath0990.47036MaRDI QIDQ2782064

Ya. V. Mikityuk, Yu. Dzhala

Publication date: 14 April 2002

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

zbMATH Keywords

singular perturbations resolvent set selfadjoint operators essential spectrum point spectrum nonselfadjoint boundary value problem biharmonic equation in space spectrum of boundary value problem

Mathematics Subject Classification ID

Perturbation theory of linear operators (47A55) Linear symmetric and selfadjoint operators (unbounded) (47B25) General theory of partial differential operators (47F05) Linear spaces of operators (47L05)

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