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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

Hipersuperfacies Conformemente Planas no Espaço Euclidiano R4 / Conformally flat hypersurface

SOUSA, Marcio Lemes de 28 March 2008 (has links)
Made available in DSpace on 2014-07-29T16:02:21Z (GMT). No. of bitstreams: 1 dissertacao Marcio Sousa.pdf: 1577321 bytes, checksum: 129e31ce6d4f51565ec3a99854ce7290 (MD5) Previous issue date: 2008-03-28 / In this work we develop the article "Conformally Flat Hypersurfaces in Euclidean 4-space II", of Suyama, where is presented the study on conformally °at hypersurfaces in the Euclidean 4-spaces R4. From a surface with constant Gaussian curvature positive or negative in either Euclidean 3-space R3 or the standard 3-sphere S3, we constructed a family of conformally °at hypersurfaces in R4, with three distinct principal curvatures / Neste trabalho desenvolvemos o artigo "Conformally Flat Hypersurfaces in Euclidean 4- space II", de Suyama, onde é apresentado um estudo sobre hipersuperfícies conformemente planas no espa»co Euclidiano R4. A partir de superfícies em R3 ou S3, com curvatura gaussiana constante negativa ou positiva, construímos uma família de hipersuperfácies conformemente planas em R4, com três curvaturas principais distintas
2

Um caso particular da desigualdade de Heintze e Karcher

Mota, Andrea Martins da 15 September 2014 (has links)
Submitted by Kamila Costa (kamilavasconceloscosta@gmail.com) on 2015-06-17T20:37:08Z No. of bitstreams: 1 Dissertação-Andrea M da Mota.pdf: 827395 bytes, checksum: 3b513795b0e557b49dc4814527d37611 (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2015-06-19T14:12:03Z (GMT) No. of bitstreams: 1 Dissertação-Andrea M da Mota.pdf: 827395 bytes, checksum: 3b513795b0e557b49dc4814527d37611 (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2015-06-19T14:14:29Z (GMT) No. of bitstreams: 1 Dissertação-Andrea M da Mota.pdf: 827395 bytes, checksum: 3b513795b0e557b49dc4814527d37611 (MD5) / Made available in DSpace on 2015-06-19T14:14:29Z (GMT). No. of bitstreams: 1 Dissertação-Andrea M da Mota.pdf: 827395 bytes, checksum: 3b513795b0e557b49dc4814527d37611 (MD5) Previous issue date: 2014-09-15 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The objective of this notes is to prove in detail a theorem, due to Ernst Heintze and Hermann Karcher, establishing an upper bound for the volume of compact domains in a connected closed hypersurface immersed in Euclidean space E. As application we will give an alternative proof of the Alexandrov’s theorem, which states that the Euclidean spheres are the only embedded closed hypersurfaces of constant mean curvature in E. / O objetivo deste trabalho é demonstrar em detalhes um teorema devido a Ernst Heintze e Hermann Karcher que estabelece uma cota superior para o volume de domínios compactos em uma hipersuperfície conexa, fechada e mergulhada no espaço euclidiano E. Como aplicação será dada uma prova alternativa do Teorema de Alexandrov, que caracteriza as esferas euclidianas como as únicas hipersuperfícies conexas, fechadas e mergulhadas de curvatura média constante em E.

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