The application of polynomial reproducing methods has been explored in the context of linear and non linear problems. Of specific interest is the application of a recently developed reproducing scheme, referred to as the error reproducing kernel method (ERKM), which uses non-uniform rational B-splines (NURBS) to construct the basis functions, an aspect that potentially helps bring in locall support, convex approximation and variation diminishing properties in the functional approximation. Polynomial reproducing methods have been applied to solve problems coming under the class of a simplified theory called Cosserat theory. Structures such as a rod which have special geometric properties can be modeled with the aid of such simplified theories. It has been observed that the application of mesh-free methods to solve the aforementioned problems has the advantage that large deformations and exact cross-sectional deformations in a rod could be captured exactly by modeling the rod just in one dimension without the problem of distortion of elements or element locking which would have had some effect if the problem were to be solved using mesh based methods. Polynomial reproducing methods have been applied to problems in fracture mechanics to study the propagation of crack in a structure. As it is often desirable to limit the use of the polynomial reproducing methods to some parts of the domain where their unique advantages such as fast convergence, good accuracy, smooth derivatives, and trivial adaptivity are beneficial, a coupling procedure has been adopted with the objective of using the advantages of both FEM and polynomial reproducing methods. Exploration of SMW (Sherman-Morrison-Woodbury) in the context of polynomial reproducing methods has been done which would assist in calculating the inverse of a perturbed matrix (stiffness matrix in our case). This would to a great extent reduce the cost of computation. In this thesis, as a first step attempts have been made to apply Mesh free cosserat theory to one dimensional problems. The idea was to bring out the advantages and limitations of mesh free cosserat theory and then extend it to 2D problems.

Made available in DSpace on 2015-03-03T15:36:13Z (GMT). No. of bitstreams: 1 NilsonHN_DISSERT.pdf: 1119783 bytes, checksum: 06971d48c83bfd25f8c12df9752dbc20 (MD5) Previous issue date: 2013-08-14 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Among several theorems which are taught in basic education some of them can be proved in the classroom and others do not, because the degree of difficulty of its formal proof. A classic example is the Fundamental Theorem of Algebra which is not proved, it is necessary higher-level knowledge in mathematics. In this paper, we justify the validity of this theorem intuitively using the software Geogebra. And, based on [2] we will present a clear formal proof of this theorem that is addressed to school teachers and undergraduate students in mathematics / Dentre os v?rios teoremas que s?o ensinados na educa??o b?sica, alguns podem ser demonstrados em sala de aula e outros n?o, devido o grau de dificuldade de sua prova formal. Um exemplo cl?ssico e o Teorema Fundamental da Alg?bra, que n?o ? demonstrado, pois ? necess?rio conhecimentos em Matem?tica de n?vel superior. Neste trabalho, justicamos intuitivamente a validade do Teorema Fundamental da Algebra usando o software Geogebra. E, baseados em [2], apresentamos uma clara demonstra??o formal desse teorema que est? endere?ada aos professores do ensino b?sico e alunos de licenciatura em Matem?tica

Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-09-29T19:20:16Z No. of bitstreams: 1 alinesouzareis.pdf: 273728 bytes, checksum: 48ebd086f8af423a6fe43cf974ce8847 (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-10-09T19:38:40Z (GMT) No. of bitstreams: 1 alinesouzareis.pdf: 273728 bytes, checksum: 48ebd086f8af423a6fe43cf974ce8847 (MD5) / Made available in DSpace on 2017-10-09T19:38:40Z (GMT). No. of bitstreams: 1 alinesouzareis.pdf: 273728 bytes, checksum: 48ebd086f8af423a6fe43cf974ce8847 (MD5) Previous issue date: 2017-08-05 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Este trabalho surgiu a partir de uma preocupação do desenvolvimento do raciocínio algébrico dos estudantes, visto que, muitos deles não se sentem confortáveis quando começam a estudar as incógnitas dentro da Matemática. Propomos a utilização da metodologia da Resolução de Problemas aliada a História da Álgebra, no desenvolvimento da linguagem algébrica, como método facilitador da compreensão dos conceitos relacionados à equação polinomial do primeiro grau. Buscamos, a partir de estudos bibliográficos referentes à História da Álgebra e Resolução de Problemas Matemáticos, propor atividades pedagógicas que abordam o desenvolvimento da linguagem algébrica. As atividades aqui descritas são proposta a serem aplicadas com turmas de 7o ano do Ensino Fundamental, ao longo de oito semanas, com encontros semanais de 1 hora e 40 minutos. Esperamos ampliar a formação do estudante contribuindo para a construção de conceitos relativos à abstração e generalização matemática, pois acreditamos ser primordial que o aluno compreenda a transição da linguagem verbal para a linguagem algébrica . / This work arose from a concern for the development of students’ algebraic reasoning, since many of them do not feel comfortable when they begin to study the variables within Mathematics. We propose the use of the Problem Solving methodology and the History of Algebra, in the development of algebraic language, as a facilitating method for understanding the concepts related to the first-degree polynomial equation. From bibliographic studies concerning the History of Algebra and Resolution of Mathematical Problems, we have proposed pedagogical activities that deal with the development of algebraic language. The activities are proposed to be applied with 7th grade classes of elementary school, over eight weeks, with weekly meetings of 1 hour and 40 minutes. We hope to broaden student training by contributing to the construction of concepts related to abstraction and mathematical generalization, as we believe it is paramount that the student understands the transition from verbal to algebraic language.

The main objective of this dissertation is to present an algebraic method capable of determining a solution, if any, of a non linear polynomial equation systems using Gröbner basis. In order to accomplish that, we first present some concepts and theorems linked to polynomial rings with several undetermined and monomial ideals where we highlight the division extended algorithm, the Hilbert Basis and the Buchberger´s algorithm. Beyond that, using basics of Elimination and Extension Theorems, we present an algebraic solution to the map coloring that use 3 colors as well as a general solution to the Sudoku puzzle. / O objetivo principal desse trabalho é, usando bases de Gröbner, apresentar um método algébrico capaz de determinar a solução, quando existir, de sistemas de equações polinomiais não necessariamente lineares. Para tanto, necessitamos inicialmente apresentar alguns conceitos e teoremas ligados a anéis de polinômios com várias indeterminadas e de ideais monomiais, dentre os quais destacamos o algoritmo extendido da divisão, o teorema da Base de Hilbert e o algoritmo de Buchberger. Além disso, usando noções básicas da Teoria de eliminação e extensão, apresentamos uma solução algébrica para o problema da coloração de mapas usando três cores, bem como um solução geral para o puzzle Sudoku.