Cartesian Product
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Génesis Semiótica de los Enteros
Abstract The traditional presentation of the integers ring generates difficulties for learning the product with its well-known signs rule. Our working hypothesis is that the solely representation of the product of two natural numbers by the area of a rectangle can hinder the vision of the product of two integers. Referring us to the scheme of Mathematical Wo
Bolema. Publicado em: 2016-04
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2. 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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3. Quem dança com quem: o desenvolvimento do raciocínio combinatório do 2 ano do ensino fundamental ao 3 ano do ensino médio
In the present study, Primary to High School students performance and strategies were analysed (11 years of schooling) in relation to problem solving of situations that involve combinatorial reasoning, focusing on the dimensions pointed out by Vergnaud (1990): meanings, invariants and symbolic representations. With this purpose, 568 students of four schools
Publicado em: 2009
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4. Problemas de estruturas aditivas e multiplicativas propostos em livros didÃticos de matemÃtica: o impacto do Programa Nacional do Livro DidÃtico
This research presents an analysis of how additive and multiplicative problems are presented in Elementary School Mathematics textbooks. The aim of the study is to observe the impact that the PNLD, the Brazilian National Plan of Textbooks, has on the treatment given to the meanings of the arithmetic operations and the forms of symbolic representations presen
Publicado em: 2009
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5. Catatau: literatura de obstrução em país bloqueado / Catatau: obstruction literature in locked country
These lines, along which one usually unfolds an abstract, might as well be termed as warning. Perhaps it would allow the reader a more vivid impression, once it consists not in a general presentation of the following pages, but rather an advice to the rash ones. One shall be brief. Not a map, just a script. On the course of this text one has tried to show wh
Publicado em: 2009
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6. Um teorema tipo Borsuk-Ulam para espaços topológicos gerais em termos do grupo fundamental
The celebrate 2-dimensional Borsuk-Ulam theorem says that if f is a continuous map from the 2-dimensional sphere and with values in the euclidean 2-dimensional space then there exists a point x in the 2-dimensional sphere such that f(x) = f(-x). Many generalizations of this result have been studied, in many directions. A line of generalizations consists in r
Publicado em: 2008
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7. Mergulho de produtos de esferas e suas somas conexas em codimensão 1 / Embeddings of cartesian products of spheres and its connected sums in codimension 1
Estudamos inicialmente resultados de classificação de difeomorfismos de produtos de esferas de mesma dimensão. Tratado isto, estudamos os mergulhos suaves de produtos de três esferas, sendo a primeira de dimensão um e as demais de dimensão maior ou igual a um, com a dimensão da última maior ou igual a da segunda, em uma esfera em codimensão um, e bu
Publicado em: 2007
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8. Ensino e aprendizagem de problemas de produto cartesiano: inter-relações entre diferentes representações
This research is about a teaching project aiming at mastering abilities and concepts related to the solution of problems of Cartesian product. The selected population were students of 4th Grade from a State School in the eastern region of the city of São Paulo. Our reference is the G. Vergnaud Conceptual Fields Theory and we took in consideration theoretica
Publicado em: 2006
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9. The pragmatism as a method: looking for a third degree of clearness / O pragmatismo como método: em busca de um terceiro grau de clareza
In the present study weve pursued an analysis of the events that led to the formulation of the pragmatic maxim, in 1879, in How to make our ideas clear. We are going to defend the idea that the statement was elaborated as a logical principle that would characterize a third level of conceptual clarity to be summed to the two already known, clarity and distinc
Publicado em: 2005
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10. Ethos, educação e currículo: ética como saber escolar / .
This research s object of study is ethics as a school knowledge. It is a bibliographic and documental research, motivated by the question: what implicatíons will have a curricular proposal which advocates the teaching of ethics at school. This problem started because in 1997 the National Educatíonal Ministry proposed the PCN (National Curricular Parameters
Publicado em: 2002
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11. Isometric embeddings of graphs
We prove that any finite undirected graph can be canonically embedded isometrically into a maximum cartesian product of irreducible factors.
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12. Folding protein models with a simple hydrophobic energy function: The fundamental importance of monomer inside/outside segregation
The present study explores a “hydrophobic” energy function for folding simulations of the protein lattice model. The contribution of each monomer to conformational energy is the product of its “hydrophobicity” and the number of contacts it makes, i.e., E(h⃗, c⃗) = −Σi=1N cihi = −(h⃗.c⃗) is the negative scalar product between two vectors
The National Academy of Sciences.