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Eigenvalues of polyharmonic operators on variabledomains

Published online by Cambridge University Press:  06 September 2013

Davide Buoso
Affiliation:
Dipartimento di Matematica, Università degli Studi di Padova, Via Trieste, 63, 35126 Padova, Italy. dbuoso@math.unipd.it; lamberti@math.unipd.it
Pier Domenico Lamberti
Affiliation:
Dipartimento di Matematica, Università degli Studi di Padova, Via Trieste, 63, 35126 Padova, Italy. dbuoso@math.unipd.it; lamberti@math.unipd.it

Abstract

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We consider a class of eigenvalue problems for polyharmonic operators, includingDirichlet and buckling-type eigenvalue problems. We prove an analyticity result for thedependence of the symmetric functions of the eigenvalues upon domain perturbations andcompute Hadamard-type formulas for the Frechét differentials. We also considerisovolumetric domain perturbations and characterize the corresponding critical domains forthe symmetric functions of the eigenvalues. Finally, we prove that balls are criticaldomains.

Information

Type
Research Article
Copyright
© EDP Sciences, SMAI, 2013