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Results 361-370 of 409 (Search time: 0.023 seconds).
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As interpretações contemporâneas da mecânica quânticaJúnior, Osvaldo-2008-
The Atiyah-Singer Index Theorem: A Heat Kernel (PDE's) ProofBotelho, Luiz C.L.-2008We 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 PropagationBotelho, Luiz C. L.-2008We 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 Brasilde Cerqueira Leit, Rogério CezarCentro de Gestão e Estudos Estratégicos (Brasil) (CGEE)2009Prefacio -- 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 fieldBotelho, Luiz C. L.Centro Brasileiro de Pesquisas Físicas (CBPF)2008We 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. SwiecaSchroer, Bert-2007After 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 supersymmetriesGonzales, M. (Marcelo); Rojas, M. (Moises); Toppan, Francesco-2008We 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 kernelMenezes, G.(Gabriel); Svaiter, Nami Fux-2006We 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 algorithmOliveira, Fabiano Sutter de-2006In 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 classificationBotelho, Luiz C. L.-2009We 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.
Results 361-370 of 409 (Search time: 0.023 seconds).