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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Desigualdades universais para autovalores do operador poli-harmônico / Universal bounds for eigenvalues of the polyharmonic operator

PEREIRA, Rosane Gomes 09 March 2012 (has links)
Made available in DSpace on 2014-07-29T16:02:20Z (GMT). No. of bitstreams: 1 Rosane Gomes Pereira.pdf: 525845 bytes, checksum: 76abe0b472d0e4b44a4d3197912958d3 (MD5) Previous issue date: 2012-03-09 / In this work, we study eigenvalues of polyharmonic operators on compact Riemannian manifolds with boundary (possibly empty). Here, we bring in a universal inequality for the eigenvalues of the polyharmonic operator on compact domains in an Euclidean space Rn. This inequality controls the kth eigenvalue by the lower eigenvalues, independently of the particular geometry of the domain. Besides, a inequality we present covers the important Yang inequality on eigenvalues of the Dirichlet Laplacian. Finally, we introduce universal inequalities for eigenvalues of polyharmonic operator on compact domains in a unit n-sphere Sn. NOTE: Programs do not copy or copy errors with certain symbols, formulas, formatting, etc ..., n of Rn and Sn are overwritten. View all content by clicking pdf - dissertation at the bottom of the screen. / Neste trabalho, estudamos autovalores do operador poli-harmônico em variedades Riemannianas compactas com fronteira ( possivelmente vazia ). Aqui, apresentamos uma desigualdade universal para os autovalores do operador poliharmônico em domínios compactos no Espaço Euclidiano Rn. Esta desigualdade controla o k-ésimo autovalor pelos autovalores menores, independentemente da geometria particular do domínio. Além disso, a desigualdade que apresentamos cobre a importante desigualdade de Yang em autovalores do Laplaciano de Dirichlet. Finalmente, apresentamos desigualdades universais para autovalores do operador poli-harmônico em domínios compactos na esfera unitária n- dimensional Sn. OBS: Programas não copiam ou copiam com erros certos símbolos, fórmulas, formatações etc..., o n de Rn e Sn está sobrescrito. Visualize todo conteúdo clicando pdf - dissertação na parte de baixo da tela.

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