Algebraic Concept
Mostrando 13-24 de 32 artigos, teses e dissertações.
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13. Bases de Hilbert / Hilbert Basis
There are several min-max relations in combinatorial optimization that can be proved through total dual integrality of linear systems. The algebraic concept of Hilbert basis was originally introduced with the objective of better understanding the general structure of totally dual integral systems. Some results that were proved later have shown that Hilbert b
Publicado em: 2007
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14. Resolução de inequações logarítmicas: um olhar sobre a produção dos alunos
This qualitative research was applied to students of 2nd year of high school in a Public School (Osasco-SP), with the goal to investigate procedures used by students in order to solve problems which involved inequality or logarithmic inequation. In order to reach this goal, we elaborated and selected problems which challenged in the students an investigative
Publicado em: 2007
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15. Representação e combinação de logicas : questões conceituais / Representatain and combination of logics : conceptual questions
Visando a atingir um esclarecimento sobre os conceitos fundamentais envolvidos no estudo das combinações entre lógicas, empreendemos uma alise do problema da representação geral de sistemas lógicos (com ênfase no conceito central de conseqüência lógica), juntamente com o do estabelecimento de uma noção apropriada de tradução ou morfismo entre o
Publicado em: 2007
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16. Applied nonlinear dynamics of non-smooth mechanical systems
This paper introduces practically important concept of local non-smoothness where any dynamical system can be considered as smooth in a finite size subspace of global hyperspaceomega. Global solution is generated by matching local solutions obtained by standard methods. If the dynamical system is linear in all subspaces then an implicit global analytical sol
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2006-12
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17. Heat transfer in channels with solid and porous baffles.
This work focuses on the study of flow and heat transfer in a parallel plate channel with solid and porous baffles, in both laminar and turbulent regimes by using numerical simulations. The main concern is to validate results by using a unique set of equations (for porous, solid and clear domain) for channels with solid baffles, after that change solid to po
Publicado em: 2006
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18. Representação Matemática do Comportamento Mecânico Cíclico de Solos Saturados e não Saturados / Mathematical Representation of the Cyclic Mechanical Behaviour of Saturated and Unsaturated Soils
Granular materials, such as soils, exhibit a relatively complex mechanical behaviour. Usually, the mechanical behaviour of soils is studied with the aid of the Continuum Mechanics. Materials under cyclic loadings exhibit a dierent mechanical behaviour, with respect to monotonic loadings. The mathematical theory of elastoplasticity has been employed to the nu
Publicado em: 2006
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19. Fibrilação de logicas na hierarquia de Leibniz
ln this thesis we investigate, with an abstract approach, a process of combinations of logics known as fibring of logics. ln particular we study the transference by fibring of certain properties, intrinsic to propositionallogics: protoalgebricity, equivalenciality and algebraizability. The notions above belong to the "Leibniz Hierarchy", a fundamental concep
Publicado em: 2005
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20. O conceito de grupo: sua formação por alunos de matemática / The group concept: their formed by the students of the Mathematics
This work has the obective to anlyse the group concept formed by the students of the Mathematics Course at the Federal University of Campina Grande Campina Grande Campus, as a result of their first course in abstract algebra taken in the second semester of 2002. Throughout this analysis I have tried to understand the concept of a binary operation in a set, f
Publicado em: 2005
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21. Set-valued functions / Funções ponto a conjunto
We study a mapping called a set-valued map which associates with each point of a metric space a non empty subset of another metric space. In the case of single-valued maps, contin-uous functions are characterized by two equivalent properties: one in terms of neighborhood and other in terms of sequences. These two properties can be adapted to the case of set-
Publicado em: 2005
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22. Um estudo sobre a convergência de seqüências numéricas com alunos que já tiveram contato com a noção de limite / A research about the convergence of numerical sequencies with students that already had contact with the notion of limit
This term deals with an investigation about students conceptions of a math course taking into accont concepts related to the convergence of the numerical sequencies. The individuals in this research had already had contact with the limit notion, but they hadnt studied numerical sequencies yet. The goal is to investigate the students resistency in disassociat
Publicado em: 2005
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23. Concepções do professor de matemática sobre o ensino de álgebra / Mathematics educators conceptions about the teaching of algebra
This research has investigated the Mathematics educators conceptions about the teaching of Algebra by comparing them to Algebras conceptions proposed by Usiskin and to the approaches to the teaching of Algebra suggested by Bednarz, Kieran and Lee. Qualitative analysis has been undertaken by means of the software C.H.I.C. and quantitative ones from teachers a
Publicado em: 2005
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24. O Teorema do h-cobordismo e a conjectura generalizada de PoincarÃ
The work of the following way In the first chapter it is developed to a list definitions and theorems that we found but important on subjects such as Topology, Differential Manifolds and aspects of the Algebraic Topology, which will be used in the following chapters. We considered advisable to indicate the demonstrations of the theorems, thus, like commentar
Publicado em: 2005