Buscar
Itens para a visualização no momento 1-10 of 15
Existência e regularidade de soluções fundamentais para operadores diferenciais lineares de coeficientes constantes
(Universidade Federal de Santa Maria, 2020-03-19)
The main objective of this dissertation is to present a theorem that guarantees the existence
and regularity of fundamental solutions for linear differential operators with constant
coefficients. We also present some of ...
Existência de solução para um problema elíptico envolvendo o expoente crítico de Sobolev
(Universidade Federal de Santa Maria, 2020-03-27)
This work presents a study on the existence or not of a solution for the following elliptical
problem with Sobolev’s critical exponent
8>
><>>:
����� u = u2 �����1 + f(x; u) in
u > 0 in
u = 0 on @
;
where
...
Bordo assintótico de superfícies mínimas em H2 × R
(Universidade Federal de Santa Maria, 2020-02-27)
In this work, we present some examples of minimal surfaces in H2 × R, and also a description
of the product and geodesic boundary of these surfaces. Our main goal is to
prove Theorem 5.1 of the Kloeckner and Mazzeo’s ...
Retratos de fase de uma família de sistemas quadráticos planares integráveis com duas parábolas invariantes
(Universidade Federal de Santa Maria, 2021-05-07)
In this work we prove the Grobman-Hartman Theorem and the Local Stable Manifold
Theorem, classical results in the study of the local behavior of the solutions of nonlinear
differential equations. Then we provide the ...
Modelos matemáticos para evolução de resistência de insetos-praga a transgênicos
(Universidade Federal de Santa Maria, 2021-04-30)
Genetically Modified Organisms (GMOs) are organisms that have undergone artificial
changes in their genetic material. We can cite as an example of GMOs, genetically modified
crops or, simply, transgenic crops. The main ...
Cografos integrais
(Universidade Federal de Santa Maria, 2021-09-16)
The search for integral cographs is a topic of interest in Spectral Graph Theory. From this,
and motivated by the structural characteristics of these graphs, and by their spectral properties,
we propose, in this dissertation, ...
Mergulho de superfície mínima e curvatura total de seu bordo
(Universidade Federal de Santa Maria, 2021-10-07)
Given a minimal submanifold Σn ⊂ Rm with compact boundary Γn−¹, in this work we
analyze under which conditions on Γ we can conclude that Σ is embedded. We show that if a
simple closed curve Γ ⊂ Rm, piecewise regular and ...
Retratos de fase de uma família de sistemas cúbicos planares integráveis com duas parábolas invariantes
(Universidade Federal de Santa Maria, 2022-06-10)
In this work we present results of the qualitative theory of Ordinary Differential Equations
used in the study of planar vector fields. Then, we apply these results to determine the
global phase portrait in the Poincaré ...
A solução fundamental na obtenção das frequências naturais e autofunções de um sistema de viga dupla Euler-Bernoulli com camada elástica e força axial
(Universidade Federal de Santa Maria, 2022-08-18)
In this work we approach a double Euler-Bernoulli beam system with axial force coupled by
an elastic layer. We performed a matrix formulation for the system of equations and for the
boundary conditions, which allows ...
Modelos epidemiológicos em tempo discreto
(Universidade Federal de Santa Maria, 2022-08-25)
In an endemics, an infeccious disease remains prevalent, in low levels, in a population. In this
work, three discrete time mathematical models for an endemic disease are studied: the SIR,
the SEIR and SEIRS models. For ...