Results 41 to 50 of about 78,878 (200)

Extending the hyper‐logistic model to the random setting: New theoretical results with real‐world applications

Mathematical Methods in the Applied Sciences, EarlyView.
We develop a full randomization of the classical hyper‐logistic growth model by obtaining closed‐form expressions for relevant quantities of interest, such as the first probability density function of its solution, the time until a given fixed population is reached, and the population at the inflection point.
Juan Carlos Cortés, Ana Navarro‐Quiles, Sorina Madalina Sferle   +2 more
wiley   +1 more source

Uma investigação sobre o erro em Matemática: possibilidades para a aprendizagem matemática

Tangram, 2021
Este relato objetiva apresentar os resultados de uma investigação realizada durante a execução de um trabalho de conclusão de curso com o tema do erro em avaliações e práticas docentes em Matemática. Nesse sentido, os dados produzidos buscam mostrar como
Marco Aurélio Kistemann Jr., Cristiane Corrêa Amaral   +1 more
doaj   +1 more source

A Geometric Interpretation for the Algebraic Properties of Second‐Order Ordinary Differential Equations

Mathematical Methods in the Applied Sciences, Volume 48, Issue 6, Page 6912-6917, April 2025.
ABSTRACT Nowadays, a substantial portion of investigations concerning the symmetry analysis of differential equations predominantly adhere to a framework comprising the following key procedures: (i) the derivation of symmetries, (ii) the determination of an optimal system, (iii) the utilization of these symmetries to construct invariants or ...
A. Paliathanasis, S. Moyo, P. G. L. Leach   +2 more
wiley   +1 more source

C∞$$ {C}^{\infty } $$‐Structures for Liénard Equations and New Exact Solutions to a Class of Klein–Gordon Equations

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT Liénard equations are analyzed using the recent theory of 𝒞∞‐structures. For each Liénard equation, a 𝒞∞‐structure is determined by using a Lie point symmetry and a 𝒞∞‐symmetry. Based on this approach, a novel method for integrating these equations is proposed, which consists in solving sequentially two completely integrable Pfaffian equations.
Beltrán de la Flor, Adrián Ruiz, Concepción Muriel   +2 more
wiley   +1 more source

Matemática comparada con otras disciplinas en el índice de citación Scimago

Papeles, 2017
Este artículo presenta la producción de la disciplina de la matemática en los cinco primeros Journals (revistas especializadas), en términos de temas, bajo el índice de Scimago (15 de abril de 20171); se clasifican los títulos y resúmenes sacados de la ...
Laura Buitrago Niño, Enrique Ferrer-Corredor   +1 more
doaj   +1 more source

As aulas de matemática na escolarização inclusiva de um sujeito cego: o caso Lucas

Revista Cocar, 2018
O trabalho aqui apresentado configura-se como um estudo de caso, no qual utilizamos como procedimento para coleta de dados uma entrevista semiestruturada composta por oito (08) questões e, para o tratamento dos dados, foi empregada parte da Análise de Conteúdo. O sujeito analisado, que assume o pseudônimo de Lucas nesse trabalho, é um aluno cego,
Borges, Fábio Alexandre, Pereira, Tiago   +1 more
openaire   +1 more source

Approximation of Discontinuous Functions by Positive Linear Operators. A Probabilistic Approach

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT We obtain approximation results for general positive linear operators satisfying mild conditions, when acting on discontinuous functions and absolutely continuous functions having discontinuous derivatives. The upper bounds, given in terms of a local first modulus of continuity, are best possible, in the sense that we can construct particular ...
J.A. Adell, P. Garrancho, F.J. Martínez‐Sánchez   +2 more
wiley   +1 more source

Analysis of a Mathematical Model of Marital Satisfaction

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT A large number of marriages end in divorce. In this paper, we present a model for the emotional state of a couple based on bilinear ordinary differential equations. We study the effect of changes of each individual's self‐emotional state on the couple's state.
Benito Chen‐Charpentier, C. E. Garza‐Hume, M. C. Jorge   +2 more
wiley   +1 more source

A invenção da teoria das tranças

Revista Brasileira de História da Ciência
Este artigo trata da criação da teoria das tranças sob um ponto de vista histórico e parte da seguinte questão investigativa: como aconteceu a criação da teoria das tranças?
Juliana Roberta Theodoro de Lima, Ediel Azevedo Guerra   +1 more
doaj   +1 more source

Asymptotics for the Spectrum of the Laplacian in Thin Bars with Varying Cross Sections

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT We consider spectral problems for the Laplace operator in 3D rod structures with a small cross section of diameter O(ε)$$ O\left(\varepsilon \right) $$, ε$$ \varepsilon $$ being a positive parameter. The boundary conditions are Dirichlet (Neumann, respectively) on the bases of this structure, and Neumann on the lateral boundary.
Pablo Benavent‐Ocejo, Delfina Gómez, Maria‐Eugenia Pérez‐Martínez   +2 more
wiley   +1 more source