Dissertação (PGMAT)

 

Recent Submissions

  • Silva, Angela Lima da; https://lattes.cnpq.br/1582007949170364 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2025-07-18)
    Studies have shown that certain survival datasets are not adequately represented by the proportional hazards model proposed by Cox (1972), highlighting the need for alternative approaches that accommodate non-proportional ...
  • Silva, Wanessa Muricy; http://lattes.cnpq.br/1370020629163620 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2025-07-24)
    In this master’s dissertation, we characterize the most general one-dimensional Brownian motion under some Markovian behavior at zero via the study of its infinitesimal generators. The class of processes here considered ...
  • Rocha, Jamile Ceci dos Santos; http://lattes.cnpq.br/1258349042931159 (Universidade Federal da BahiaMestrado Profissional em Matemática em Rede Nacional (PROFMAT) UFBABrasilInstituto de Matemática, 2025-06-27)
    In the school context, in order to foster students’ interest in mathematical knowledge, many teachers revisit pedagogical planning and teaching practices, diversify instructional methodologies, and propose interdisciplinary ...
  • Silva, Izamara Ferreira; http://lattes.cnpq.br/9705361024665448 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2025-08-25)
    Let K be an infinite field of characteristic , 2, E is the infinite-dimensional Grassmann algebra over this field, and φ is an involution on E. Based primarily on [1], in this work, we present a description of the sets ...
  • Vieira, Lucas Santos; http://lattes.cnpq.br/7341032141646178 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2024-02-26)
    Beta and Simplex regression models have been widely used to analyze variables that represent rates, proportions or index, that is, variables measurable in the open interval (0.1). In some phenomena these variables are ...
  • Almeida, Rafael Toledo Costa de; https://orcid.org/0000-0002-4731-7975; http://lattes.cnpq.br/2192564435787089 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2025-04-22)
    In survival analysis, the primary interest is often the time until the occurrence of a single event; however, there are situations where interest lies in multiple events, and the occurrence of one event precludes the ...
  • Silva, Kim Leone Souza da; https://orcid.org/0009-0003-0609-4167; http://lattes.cnpq.br/4234453341183971 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2024-12-06)
    The human impact on the planet is evident, and the need to mitigate these effects is becoming increasingly urgent. Atmospheric pollution, for example, is intrinsically linked to the environment and human health. Particulate ...
  • Almeida, Ugo Coutinho Monteiro; http://lattes.cnpq.br/6218495529266423 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2025-09-05)
    The Leibniz hierarchy constitutes a classification system for propositional logics based on the behavior of the Leibniz operator associated to each logic, which is one of the main subjects of interest pertaining to the ...
  • Dias, Marcelo Oliveira; http://lattes.cnpq.br/9162004009334526 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2025-03-13)
    In this dissertation, we will adress recent developments in the theory of topological cardinal invariants, as well as their motivations from classical results. We will introduce the elementary submodels, a tool that is ...
  • Rocha Neto, Carlos Nascimento; http://lattes.cnpq.br/0905202579365283 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2025-04-08)
    The main objective of this work is to investigate and prove the existence and stability of a family of exponential pullback attractors for a class of non-autonomous reaction-diffusion equations with nonlinearity fulfilling ...
  • Oliveira, João Mark Souza; http://lattes.cnpq.br/9885399083014377 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2025-02-04)
    The simplest analytical approach to model the propagation of wildfires considers that the velocity space is represented by an indicatrix at each point. Since then, elliptic modeling has been widely accepted. In A general ...
  • Eustorgio Filho, Marcos Aurélio; https://orcid.org/0000-0003-4596-5896; http://lattes.cnpq.br/0006073382117233 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2024-10-31)
    Distal outcomes models encompass methods for estimating the impact of latent variables on observed outcomes while accounting for other predictors, increasing the mathematical complexity of the models. Recent techniques aim ...
  • Morales, Gabriel Andrés Borges; https://lattes.cnpq.br/0161797957664460 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2024-11-21)
    Weshall prove that the Julia set Jc is asymptotically similar to the Mandelbrot set M about a Misiurewicz parameter c, using the concept of similarity and the Hausdorff-Chabauty distance. This result was originally proved ...
  • Blez, Manfinapul Armando; https://lattes.cnpq.br/7792562979553305 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2024-10-02)
    In this work, we present generalized Pythagorean theorems for multidimensional volumes in real or complex spaces. The complex case was discovered recently, and is simpler than the real one. These generalizations arise from ...
  • Leite Júnior, João Augusto de Moura; http://lattes.cnpq.br/9313871419457600 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2024-07-26)
    In general terms, this dissertation aims to study, from the geometric perspective of jet spaces and exterior differential systems, the differential equations and the relationships that can be established between their ...
  • Santos, Pedro Emanuel Oliveira dos; https://lattes.cnpq.br/7523563070878016 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2024-05-10)
    In this paper we present the concepts of Baire Ergodicity and Ergodic Formalism introduced in \cite{Pi1}. We use them to study topological attractors and statistical attractors and, in particular, to determine their ...
  • Arouca, Igor Barbosa; http://lattes.cnpq.br/6524923752008346 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2024-06-28)
    This work aims to study the Darboux integrability of some Euler-Lagrange exterior differential systems that geometrically describe harmonic maps. In particular, we consider harmonic maps from the 2-dimensional Minkowski ...
  • Paz, Hellen Oliveira da; http://lattes.cnpq.br/6712262587708162 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2024-06-26)
    Cluster Analysis is an area with vast methodological development in different areas of knowledge. This dissertation proposes a new clustering method for mixed data, taking into account the multilevel structure of observations. ...
  • Sousa, Sara Santana de; http://lattes.cnpq.br/1588179575225740 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2024-07-04)
    We will present the relationship between functions and isoparametric hypersurfaces of a Zermelo manifold with a Riemann-Finslerian metric in the navigation data, in particular a Randers manifold, with the functions and ...
  • Sena, Jose Guilherme Santana; https://orcid.org/0000-0001-7860-2739; http://lattes.cnpq.br/1364361131422188 (Universidade Federal da BahiaPós-Graduação em Matemática (PGMAT) UFBABrasilInstituto de Matemática, 2024-05-09)
    In this work, we propose statistical models for the analysis of data that exhibit variation over time. In particular, when the variable (or characteristic) of interest is continuous in the interval (0,1), as is the case ...

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