Principal Bundles
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Álgebras de Clifford e a fibração de Hopf / Clifford algebras and the Hopf fibration
Spin groups come in many forms in Mathematics and Mathematical Physics, having great importance in the theory of fiber bundles and differential operators defined on them. The concept of spin structure is derived from them, being the basis of all a theory, known as spin geometry. This thesis introduces the first concepts necessary for the study of such groups
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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2. Tipos de homotopia dos grupos de gauge dos fibrados linhas quaterniônicos sobre esferas / Homotopy type of Gauge groups of quaternionic line bundles over spheres
Let p be a principal S POT. 3- bundle over a sphere S POT. n, with n>or =4. The subject of this work is to calculate the homotopy type of the gauge group G IND. pof these bundles p, extending the result determined by A. Kono [25] when n = 4. We present explicit formulas for the boundary operator in the homotopy exact sequence associated with the evaluation m
Publicado em: 2008
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3. Vector valued Morse exponents and semiflows in flag bundles / Expoentes de Morse vetoriais e semifluxos em fibrados flag
This thesis establishes an intrinsic procedure which generalizes the classical spherical/radial decomposition of linear semiflows to a broader class of semiflows of endomorphisms of G- principal fiber bundles, whose structural group G is a Lie group that is more general than the general linear group G1 (n,R). In this more general context this thesis establis
Publicado em: 2007
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4. Martingales no fibrado de bases e seções harmonicas via calculo estocastico / Martingales in frame bundles and harmonic sections through stochastic calculus
Neste trabalho estudamos os martingales no fibrado de bases e suas relações com os martingales no fibrado tangente. Caracterizamos as aplicações harmônicas a valores no fibrado de bases e as relacionamos com as aplicações harmônicas a valores no fibrado tangente. Numa segunda parte estudamos a harmonicidade das seções de um fibrado via geometria es
Publicado em: 2007
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5. Construção de espaços classificantes.
In this work we present a construction of classifying spaces for principal bundles by studying simplicial and co-simplicial objects over a category and as application we present the construction of Eilenberg-MacLane spaces K(G; n); where G is a (abelian if n >1) group and n is a positive integer.
Publicado em: 2004
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6. Anisotropias opticas em feixes de colageno e pesquisa de morte celular em fibroblastos de tendões durante o estabelecimento do diabetes espontaneo em camundongos não-obesos (NOD)
NOD mice possess two characteristics: diabetes and resistance to various apoptosis signals. Diabetes mellitus provokes alterations in the extracellular matrix (ECM) through of the non-enzymatic glycosylation of intercellular proteins, such as the collagen. In the process of non-enzymatic glycosylation of the collagen protein, the carbonyl group of a sugar re
Publicado em: 2004
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7. Desenvolvimento de um fotometro multicanal baseado em um arranjo de diodos emissores de luz
The development of a multichannel photometer based on an array of eight Light Emitting Diodes (LED) is described. Optical fibre bundles were employed to guide the radiation of the LED to the measuring cell and from the cell to the photodiode detector. The instrument was designed to perform measurements in a single wavelength continuously as well as in all wa
Publicado em: 2004
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8. Chain control sets and fiber bundles
Let S be a semigroup of homeomorphisms of a compact metric space M and suppose that
is a family of subsets of S. This paper gives a characterization of the
Computational & Applied Mathematics. Publicado em: 2003
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9. Fenomenos de não-cancelamento relacionados a S3 - fibrados
The present work is intended to the study of the Rigas s models [R2], for principal S3-bundles over S7, to search a better understanding of a specific non-cancellation phenomena, namely, using these models we explicit (up to some homotopies) the diffeomorphism between Sp(2) X S3 and E7w x S3 where E7w is the total space of the principal S3 - bundle over S7 c
Publicado em: 1997
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10. Fundamentos matematicos das teorias de calibre
The purpose of this dissertation is to revisit, from the point of view of some modern mathematical methods, the mathematical foundation of gauge theories. We study in detail the theories of fiber bundles and of conections on fiber bundles. We formulate the gauge theories in the language of principal fiber bundles, finding the Klein-Gordon equation and the Kl
Publicado em: 1992
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11. Some Cohomology Classes in Principal Fiber Bundles and Their Application to Riemannian Geometry
We define some new global invariants of a fiber bundle with a connection. They are cohomology classes in the principal fiber bundle that are defined when certain characteristic curvature forms vanish. In the case of the principal tangent bundle of a riemannian manifold, they are invariant under a conformal transformation of the metric. They give necessary co
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12. Rapid Microtubule-dependent Induction of Neurite-like Extensions in NIH 3T3 Fibroblasts by Inhibition of ROCK and Cbl
A number of key cellular functions, such as morphological differentiation and cell motility, are closely associated with changes in cytoskeletal dynamics. Many of the principal signaling components involved in actin cytoskeletal dynamics have been identified, and these have been shown to be critically involved in cell motility. In contrast, signaling to micr
The American Society for Cell Biology.