Generalized Manifolds
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. MÃtricas m-quasi-Einstein generalizadas em variedades compactas / Generalized m-quasi-Einstein metrics in compact manifolds
O principal objetivo deste trabalho à apresentar uma generalizaÃÃo das mÃtricas quasi-Einstein generalizadas para campos de vetores suaves quaisquer. AlÃm disso, serÃo apresentadas algumas fÃrmulas integrais para mÃtricas quasi-Einstein gradiente generalizadas definidas em uma variedade compacta.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/07/2012
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2. Equigeodésicas e aplicações equiharmômnicas em variedades flag generalizadas / Equigeodesics and equiharmonic maps on generalized flag manifolds
O principal objetivo deste trabalho é o estudo de aplicações harmônicas em variedades flag generalizadas. Na primeira parte do trabalho, consideramos aplicações cujo domínio é uma superfície de Riemann. Provamos que toda aplicação holomorfa-horizontal na variedade flag é uma aplicação equiharmônica (ie, harmônica com respeito a cada métrica
Publicado em: 2011
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3. Sobre a geometria de imersÃes isomÃtricas em variedades de Lorentz conformemente estacionÃrias / On the geometry of varieties of isometric immersions in Lorents stationary conformally
In this thesis we study several aspects of the geometry of conformally stationary Lorentz manifolds and, more particularly, of generalized Robertson-Walker spaces, under the presence of a closed conformal vector field. We initiate by focusing our study on the r-stability and on the strong r-stability of closed spacelike hypersurfaces of conformally stationar
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/12/2010
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4. Detectando fatores de variedade de codimensão um com propriedades de posição geral
This work is an approach to the famous "Product with a Line Problem". It investigates the class of topological spaces whose cartesian product with R is a topological manifold. Such spaces are called "Codimension One Manifold Factors". Based mainly on [5, 7, 14, 15, 24], we introduce the concept of generalized manifolds, which are separable ANR spaces with sa
Publicado em: 2010
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5. Metricas de Einstein e estruturas Hermitianas invariantes em variedades bandeira / Einstein metrics and invariant Hermitian structures on flag manifolds
In this work we and all the invariant Einstein metrics on four families of ag manifolds of type Bl and Cl. Our results are consistent with the finiteness conjecture of Einstein metrics proposed by Wang and Ziller. Our approach for solving the Einstein equations is based on the symmetries of the algebraic system. We obtain the Einstein algebraic systems for t
Publicado em: 2009
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6. Reidemeister torsion of spherical space forms / Torção de Reidemeister das formas espaciais esféricas
In this work, we study the action of the generalized quaternionic groups Q IND.4ton the spheres to compute the Reidemeister torsion of the quotient spaces, which are called Quaternionic Spherical Space Forms. Using the base of the homology defined by Ray and Singer in [27] we compute also the Ray-Singer torsion of the spheres, lens spaces and the cone over t
Publicado em: 2009
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7. Theorems of Barth-Lefschetz type for complex subspaces of homogeneous complex manifolds
Barth, Larsen, and others showed that complex submanifolds of complex projective space, CPN, of small codimension strongly resemble CPN both homotopically and cohomologically. These results are generalized to yield analogous results for complex subspaces of arbitrary homogeneous complex manifolds. One very special corollary that gives the flavor of the resul
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8. WILDER MANIFOLDS ARE LOCALLY ORIENTABLE
A proof is given for the long-standing conjecture of R. L. Wilder that every generalized manifold is locally orientable. Roughly speaking, a generalized n-manifold is a locally compact space whose local homology groups at each point are those of an n-manifold. Local orientability is a condition in which the local homology groups at neighboring points have a
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9. FAKE TORI, THE ANNULUS CONJECTURE, AND THE CONJECTURES OF KIRBY*
The main result of this note (Theorem A) is that the set of piecewise linear (P.L.) manifolds of the same homotopy type as the n-torus, Tn, n ≥ 5, is in one-to-one correspondence with the orbits of An-3(π1Tn) [unk] Z2 under the natural action of the automorphism group of π1Tn. Every homotopy torus has a finite cover P.L. homeomorphic to Tn; hence the gen
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10. Metric rigidity theorems on Hermitian locally symmetric spaces
Let X = Ω/Γ be a compact quotient of an irreducible bounded symmetric domain Ω of rank ≥2 by a discrete group ω of automorphisms without fixed points. It is well known that the Kähler-Einstein metric g on X carries seminegative curvature (in the sense of Griffiths). I show that any Hermitian metric h on X carrying seminegative curvature must be a cons
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11. Counting primes, groups, and manifolds
Let \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} \begin{equation*}{\Lambda}={\mathrm{SL}}_{2}({\mathbb{Z}})\end{equation*}\end{document} be the modular group and let cn(Λ) be the number of cong
National Academy of Sciences.