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Preview | Title | Author(s) | ???itemlist.dc.contributor.author1??? | Issue Date | ???itemlist.dc.description.resumo??? |
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As interpretações contemporâneas da mecânica quântica | Júnior, Osvaldo | - | 2008 | - | |
The Atiyah-Singer Index Theorem: A Heat Kernel (PDE's) Proof | Botelho, Luiz C.L. | - | 2008 | We present a simple Partial Differential Equation proof for the Atiyah-Singer Index Theorem in the context of Dirac Operators on a Riemman Surface. Addintionaly, we present a proof of the monotonic grown under the Ricci flux of the Dirac Operator in the presence of a abelian Gauge Connection in a Riemman Surface. | |
A Comment about the existence of a weak solution for a nonlinear Wave Damped Propagation | Botelho, Luiz C. L. | - | 2008 | We give a proof for the existence of weak solutions on the initial-value problem of a non-linear wave damped propagation. | |
Bioetanol combustível [Impresso] : uma oportunidade para o Brasil | de Cerqueira Leit, Rogério Cezar | Centro de Gestão e Estudos Estratégicos (Brasil) (CGEE) | 2009 | Prefacio -- Apresentação -- 1. Introdução: perspectivas do bioetanol no mercado de combustíveis líquido para veículos leves -- 2. Descrição do Processo Produtivo - Fase agrícola -- 3. Descrição do Processo Produtivo - Fase industrial -- 4. Áreas Potenciais para a Expansão da Produção de cana-de-açúcar -- 5. Infra-estruturar Existente e Projetos de Melhorias -- 6. Construção de Cenários Tecnológicos Sobre a Produção de bioetanol no Brasil, Avaliação dos Impactos Macroeconômicos e Riscos de o Mercado Previsto não se Concretizar -- 7. Avaliação dos Impactos Socioeconômicos Relacionados a Produção em Larga Escala de bioetanol no Brasil -- 8. Sustentabilidade -- 9. Marco Regulatório -- 10. Identificação das Necessidades de P&D e Sugestão de Alternativas para o seu Financiamento -- Resultados e Conclusões | |
Triviality - quantum decoherence of Fermionic quantum chromodynamics SU (Nc) in the presence of an external strong U([infinito]) flavored constant noise field | Botelho, Luiz C. L. | Centro Brasileiro de Pesquisas Físicas (CBPF) | 2008 | We analyze the triviality-quantum decoherence of Euclidean quantum chromodynamics in the gauge invariant quark current sector in the presence of an external flavor constant charged white noise reservoir. | |
Particle physics in the 60 and 70 and the legacy of contributions by J. A. Swieca | Schroer, Bert | - | 2007 | After revisiting some high points of particle physics and QFT of the two decades from 1960 to 1980, I comment on the work by Jorge Andr'e Swieca. I explain how it fits into the development of QFT during these two decades and draw attention to its legacy in the ongoing particle physics research. | |
One-dimensional sigma-models with N = 5, 6, 7, 8 off-shell supersymmetries | Gonzales, M. (Marcelo); Rojas, M. (Moises); Toppan, Francesco | - | 2008 | We computed the actions for the $1D$ $N=5$ $\sigma$-models with respect to the two inequivalent $(2,8,6)$ multiplets. $4$ supersymmetry generators are manifest, while the constraint originated by imposing the $5$-th supersymmetry automatically induces a full $N=8$ off-shell invariance. The resulting action coincides in the two cases and corresponds to a conformally flat $2D$ target satisfying a special geometry of rigid type. \par To obtain these results we developed a computational method (for {\em Maple 11}) which does not require the notion of superfields and is instead based on the nowadays available list of the inequivalent representations of the $1D$ $N$-extended supersymmetry. Its application to systematically analyze the $\sigma$-models off-shell invariant actions for the remaining $N=5,6,7,8$ $(k,8,8-k)$ multiplets, as well as for the $N>8$ representations, only requires more cumbersome computations. | |
Stochastic quantization of topological field theory: generalized langevin equation with memory kernel | Menezes, G.(Gabriel); Svaiter, Nami Fux | - | 2006 | We use the method of stochastic quantization in a topological field theory defined in an Euclidean space, assuming a Langevin equation with a memory kernel. We show that our procedure for the Abelian Chern-Simons theory converges regardless of the nature of the Chern-Simons coefficient. | |
Factorization of large numbers and the suggestion of an algorithm | Oliveira, Fabiano Sutter de | - | 2006 | In this paper, we intend to present a new algorithm to factorize large numbers. According to the algorithm proposed here, we prove that there is a common factor between p and q. With this procedure, the time of factorization considerably decreases. The algorithm is based on a graphic representation and, when the corresponding graph is drawn, coordinate pairs will originate two straight lines that intercept one another. These coordinate pairs are formed by prime numbers in the x-axis, and factors in the y-axis, including the factor in common. | |
On the Banach-Stone theorem and the manifold topological classification | Botelho, Luiz C. L. | - | 2009 | We present a simple set-theoretic proof of the Banach-Stone Theorem. We thus apply this Topological Classification theorem to the still-unsolved problem of topological classification of Euclidean Manifolds through two conjectures and additionaly we give a straightforward proof of the famous Brower theorem for manifolds topologically classified by their Euclidean dimensions. \noindent We start our comment announcing the:\noindent{\bf Banach-Stone Theorem} ([1]). Let $X$ and $Y$ be compact Hausdorff spaces, such that the associated function algebras of continuous functions $C(X,R)$ and $C(Y,R)$ separate points in $X$ and $Y$ respectively. We have thus \noindent a)\quad $X$ and $Y$ are homeomorphic $\Leftrightarrow$ \noindent b)\quad $C(X,R)$ and $C(Y,R)$ are isomorphic. |
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