The thesis mainly studies two problems in Algebraic Geometry and Hodge Theory. The first problem deals with the geometric realizations of certain Hermitian symmetric domains as moduli space of algebraic varieties, notably the Abelian varieties and Calabi-Yau varieties. The study of the first problem occupies most of the thesis. In section 1.3; we study the second problem, namely, the L2 Higgs cohomology of polarized variation of Hodge structures over Hermitian symmetric domains. / Sheng Mao. / "December 2005." / Advisers: Shing-Tung Yau; Nai-Chung Conan Leung. / Source: Dissertation Abstracts International, Volume: 67-11, Section: B, page: 6442. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2005. / Includes bibliographical references (p. 108-113). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstracts in English and Chinese. / School code: 1307.

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Thesis (Ph.D.)--University of Melbourne, Dept. of Mathematics and Statistics, 2007. / Typescript. Includes bibliographical references.

Thesis (Ph. D.)--University of Chicago, Department of Mathematics, June 2000. / Includes bibliographical references. Also available on the Internet.

Thesis (doctoral)--Bonn, 1997. / Includes bibliographical references (p. 93-95).

Thesis (doctoral)--Bonn, 1997. / Vita. Includes bibliographical references (p. 167-168).

Thesis (Ph. D.)--University of Washington, 2006. / Vita. Includes bibliographical references (p. 54-56).

Thesis (Ph. D.)--Universiteit van Amsterdam, 1983. / Includes bibliographical references.

Orientador: Alcibiades Rigas, Tomas Edson Barros / Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e Computação Cientifica / Made available in DSpace on 2018-08-06T01:35:44Z (GMT). No. of bitstreams: 1 Hoefel_EduardoOuteiralCorrea_D.pdf: 1956293 bytes, checksum: 425e3f8509c6c6d5b7e71d692027dfaf (MD5) Previous issue date: 2006 / Resumo: Esta tese consiste do estudo das OCHAs (Open-Closed Homotopy Algebras) sob os pontos de vista algébrico e geométrico. São demonstrados essencialmente dois resultados novos. O primeiro refere-se à definição de OCHA através de coderivações. Mais especificamente, provamos que qualquer coderivação D E Coderl (sc'Hc 0 TC'Ho) de grau 1 satisfazendo D2 = O define uma estrutura de OCHA em 'H = 'Hcffi'Ho. Onde 'Hc e 'Ho são os espaços de estados da teoria de campo de corda para cordas fechadas ("dosed strings") e cordas abertas ("open strings"), respectivamente. Até então, sabia-se que as OCHAs eram dadas por coderivações [14], mas o fato de que qualquer coderivação define uma OCHA, é novo. O segundo resultado envolve a relação entre OCHA e a versão real da compactificação de Fulton MacPherson do espaço de configurações de pontos no semi-plano superior fechado. Este resultado mostra a estreita relação entre OCHAs e a operada do "Queijo Suíço" introduzida por Voronov [41], tal relação foi de fato sugeri da na introdução de [14]. O capítulo 1 contém uma discussão sobre a definição de OCHA usando coálgebras e a conseqüente caracterização das coderivações mencionada acima. Mostramos também que a estrutura de OCHA pode ser obtida a partir de certas álgebras A(X) de forma inteiramente análoga ao modo como álgebras de Lie podem ser obtidas a partir de álgebras associativas. Em seguida, o capítulo 2 traz a abordagem das OCHAs através de operadas. O capítulo 3 traz uma discussão detalhada do espaço C(p, q) (a compactificação de Fulton;.MacPherson do espaço de configurações de p + q pontos no semi-plano superior fechado com p pontos no interior e q pontos no bordo) e no capítulo 4 mostramos que a parte essencial da operada que descreve as OCHAs aparece na primeira linha do termo E1 da seqüência espectral induzida por aquele espaço. O resultado mencionado acima significa que a estrutura algébrica das OCHAs está codificada na estratificação do bordo da variedade C(p, q), visto que esta última tem uma estrutura de variedade com córneres. No capítulo final discutimos o significado dos dois resultados obtidos procurando fazer um paralelo entre as abordagens geométrica e algébrica e mencionamos alguns problemas interessantes, como continuação deste trabalho, que podem ser considerados por estudantes interessados em Álgebras Homotópicas e temas relacionados / Abstract: This thesis consists of the study of OCHA (Open-Closed Homotopy Algebras) from both the algebraic and geometric viewpoint. It essentially contains the proof of two new results. The first one is related to the definition of OCHA through coderivations. More specifically, it is shown that any degree one coderivation D E Caderl(Sc7íc 0 TC7ío) such that D2 = O defines an OCHA structure on 7í = 7íc E9 7ío. Where 7íc and 7ío are respectively the state spaces of Closed String Field Theory and apen String Field Theory. It was cIear since its definition in 2004 that OCHAs can be defined in terms of coderivations. Nevertheless, the fact that any such coderivation is of the OCHA form is new. The second result involves the relation between OCHA and the real version of the Fulton MacPherson compactification of the configuration space of points on the cIosed upper half-plane. That result shows the cIose relation between OCHAs and the Swiss-Cheese operad introduced by Voronov [411. Such relation was in fact suggested in the introductian of [141. Chapter 1 contains a discussion about the coalgebraic definition of OCHA and the above mentioned characterization of alI coderivations. It is also shown that OCHA can be obtained from certain A8 algebras, similarly to way in which Lie algebras are obtained fro_ associative algebras. Chapter 2 then shows how to approach OCHA using aperads. The space C(p, q) (the FuIton-MacPherson compactification of the configuration space of p + q points on the upper half-plane with p interior points and q boundary points) is discussed on chapter 3 and on chapter 4 it is shown that the essential part of the operad describing OCHA appears on the first line Of the spectral sequence induced by that space. In other words, we could say that the algebraic structure of OCHA is encoded in the stratification of C(p, q), since this space has the structure of a manifold with corners. The final chapter is a discussion about the meaning of the two mais results of this thesis. After that, some problems which could be explored by the student interested on homotopy algebras and related subjects are mentioned. / Doutorado / Geometria Topologia / Doutor em Matemática

This thesis consists of two parts. In the first chapter, we give some results on modulation spaces. First the relationship between the classical spaces and the modulation spaces is established. It is proved that certain modulation spaces defined on R² lie in the BMO space. Another result is that the Zak transform, a discrete time-frequency transform, maps a modulation space into a higher dimensional modulation space. And by using these results, an uncertainty principle for Gabor frames via modulation spaces is obtained. In the second part, we deal with optimization of an increasing positively homogeneous functions on the unit simplex. The class of increasing positively homogeneous functions is one of the function classes obtained via min-type functions in the context of abstract convexity. The cutting angle method is used for the minimization of this type functions. The most important step of this method is the minimization of a function which is the maximum of a number of min-type functions on the unit simplex. We propose a numerical algorithm for the minimization of such functions on the unit simplex and we mathematically prove that this algorithm finds the exact solution of the minimization problem. Some experiments have been carried out and the results of the experiments have been presented.