RSS 1.0Departamento de Matemática
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Letters from foreign mathematicians about the context of Brazil in the 1970's
Trivizoli, Lucieli M.
(Bolema - Mathematics Education Bulletin, 2019) [Artigo]
The International Symposium on Dynamical Systems was held in Salvador, in 1971, with the participation of important Brazilian and foreign mathematicians. Steve Smale, distinguished mathematician and winner of the Fields ... -
Some results on extension of maps and applications
; Libardi, Alice K. M.; De Melo, Thiago ; (Proceedings of the Royal Society of Edinburgh Section A: Mathematics, 2019) [Artigo]
This paper concerns extension of maps using obstruction theory under a non-classical viewpoint. It is given a classification of homotopy classes of maps and as an application it is presented a simple proof of a theorem by ... -
The (reasonable) effectiveness of mathematics in empirical science
Silva, Jairo Jose da (Disputatio-philosophical Research Bulletin, 2018) [Artigo]
I discuss here the pragmatic problem in the philosophy of mathematics, that is, the applicability of mathematics, particularly in empirical science, in its many variants. My point of depart is that all sciences are formal, ... -
Multimedia Retrieval Through Unsupervised Hypergraph-Based Manifold Ranking
Guimaraes Pedronette, Daniel Carlos; Valem, Lucas Pascotti ; ; (Ieee Transactions On Image Processing, 2019) [Artigo]
Accurately ranking images and multimedia objects are of paramount relevance in many retrieval and learning tasks. Manifold learning methods have been investigated for ranking mainly due to their capacity of taking into ... -
Cobordism of maps of locally orientable Witt spaces
; Miwa Libardi, Alice Kimie; Rizziolli, Eliris Cristina ; (Publicationes Mathematicae-debrecen, 2019) [Artigo]
The aim of this work is to present some remarks on cobordism of normally nonsingular maps between compact locally orientable Witt spaces. By using the Wu classes defined by Goresky and Pardon, we give a definition of ... -
Existence and uniqueness of solution for abstract differential equations with state-dependent delayed impulses
; ; Gadotti, Marta C. (Journal Of Fixed Point Theory And Applications, 2019) [Artigo]
We study the existence and uniqueness of mild and classical solutions for a general class of abstract impulsive differential equations with state-dependent impulses. Some examples on partial differential equations are presented. -
A Multi-agent System Approach for Management of Industrial IoT Devices in Manufacturing Processes
Cagnin, Renato L.; Guilherme, Ivan R. ; Queiroz, Jonas ; Paulo, Bruno ; Neto, Marcilio F. O. ; (2018 Ieee 16th International Conference On Industrial Informatics (indin), 2018) [Trabalho apresentado em evento]
Industry 4.0 is the new industrial revolution that uses technologies to enable communication and interaction between devices. In this new environment, applications are designed to ensure concepts like connection, data ... -
UNSUPERVISED MANIFOLD LEARNING BY CORRELATION GRAPH AND STRONGLY CONNECTED COMPONENTS FOR IMAGE RETRIEVAL
Guimaraes Pedronette, Daniel Carlos; ; (2014 Ieee International Conference On Image Processing (icip), 2014) [Trabalho apresentado em evento]
This paper presents a novel manifold learning approach that takes into account the intrinsic dataset geometry. The dataset structure is modeled in terms of a Correlation Graph and analyzed using Strongly Connected Components ... -
A nonlinear model and force control of a robotic claw
; ; ; Balthazar, Jose Manoel; ; (10th International Conference On Mathematical Problems In Engineering, Aerospace And Sciences (icnpaa 2014), 2014) [Trabalho apresentado em evento]
The objective of this work is to obtain and analyze a simple representative mathematical model for a robotic claw. The claw is represented here through the interaction between two simple pendulums and a sub-system composed ... -
Expansive movements in the development of mathematical modeling: Analysis from an Activity theory perspective
; Borba, Marcelo de Carvalho (ZDM - Mathematics Education, 2017) [Artigo]
This research was conducted during an online continuing education course for mathematics teachers, whose core focus was modeling and applications. We studied the interactions of one group of two teachers, who worked ... -
El análisis de contenido como una metodología
; Miskulin, Rosana Giaretta Sguerra (Cadernos de Pesquisa, 2017) [Artigo]
In this article we discuss content analysis as a method for analysing data of qualitative research in education. The method is a fundamental part of academic work, because it gives to the investigation some characteristics ... -
Reflexões sobre Interação e Colaboração a partir de um Curso Online
Dantas, Sérgio Carrazedo; Lins, Romulo Campos (Bolema - Mathematics Education Bulletin, 2017) [Artigo]
The central concern of this study was to investigate interaction and collaboration processes in an online community of mathematics teachers. Considering the Model of Semantic Fields as our theoretical and methodological ... -
Educação a Distância Online e Formação de Professores: Práticas de pesquisas em Educação Matemática no estado de São Paulo
Paulin, Juliana França Viol; Miskulin, Rosana Giaretta Sguerra (Bolema - Mathematics Education Bulletin, 2015) [Artigo]
This paper presents a mapping on Mathematics Education Theses and Dissertations dealing with Teacher Education and Distance Learning. Thus, we are guided according to the qualitative perspective of meta-analysis, and the ... -
Uma Experiência de Formação Continuada com Professores de Arte e Matemática no Ensino de Geometria
Dos Santos, Marli Regina; Bicudo, Maria Aparecida Viggiani (Bolema - Mathematics Education Bulletin, 2015) [Artigo]
This article exposes a work for continuing education of art and mathematics teachers of basic education, focusing on the teaching of geometry through tessellations. We emphasize the constitution of a nucleus of ideas formed ... -
Fixed points on trivial surface bundles over a connected CW-complex
; Libardi, Alice Kimie Miwa; ; Vieira, João Peres (Publicationes Mathematicae, 2015) [Artigo]
The main purpose of this work is to study fixed points of fibre-preserving maps over a connected CW-complex B on the trivial surface bundles B×S where S is a closed surface of negative Euler characteristic. The case where ... -
Remarks on the existence and uniqueness of periodic solution for nth-order functional differential equations with infinite delay
Afonso, S. M.; (Dynamics of Continuous, Discrete and Impulsive Systems Series A: Mathematical Analysis, 2018) [Artigo]
In this work we apply the coincidence degree theory to establish a result on the existence and uniqueness of periodic solution for a class of nth-order functional differential equations with infinite delay. An example is ... -
Editorial
Garnica, Antonio Vicente Marafioti; Maltempi, Marcus Vinicius ; Miarka, Roger (Bolema - Mathematics Education Bulletin, 2017) [Editorial]
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On Anti-Periodic Solutions for a Class of Impulsive Retarded Functional Differential Equations
Afonso, S. M.; (Mediterranean Journal of Mathematics, 2017) [Artigo]
In this paper, some new results on the existence and uniqueness of anti-periodic solution for a first-order impulsive functional differential equation with delay are obtained. The main tool to be employed here is the ... -
Uma Escola Pode e Muito Mais, Senhor!
Fernandes, Por Filipe Santos (Bolema - Mathematics Education Bulletin, 2015) [Artigo]
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ANGELO, C. L. Uma leitura das falas dos alunos do ensino fundamental sobre a aula de matemática
Litoldo, Beatriz Fernanda (Bolema - Mathematics Education Bulletin, 2015) [Artigo]