The conditions for an extremum in spectral isoperimetric problems with variable boundary

DOI10.1016/0041-5553(87)90202-3zbMath0665.49023OpenAlexW2048785055MaRDI QIDQ3816600

Alexander S. Bratus', A. D. Myshkis

Publication date: 1987

Published in: USSR Computational Mathematics and Mathematical Physics (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1016/0041-5553(87)90202-3

zbMATH Keywords

necessary conditionssufficient conditionsextremality of multiple eigenvalues

Mathematics Subject Classification ID

Optimality conditions for problems involving partial differential equations (49K20) Control/observation systems governed by partial differential equations (93C20) General topics in linear spectral theory for PDEs (35P05) Plates (74K20) Second-order elliptic equations (35J15) Membranes (74K15)

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