Buscar
Mostrando ítems 31-40 de 240
Retratos de fase de uma família de sistemas cúbicos planares integráveis com duas parábolas invariantes
(Universidade Federal de Santa MariaBrasilMatemáticaUFSMPrograma de Pós-Graduação em MatemáticaCentro de Ciências Naturais e Exatas, 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 ...
Planar reversible vector fields, averaging theory and polycycles in non-smooth vector fields
(Universidade Estadual Paulista (Unesp), 2021-06-28)
Neste trabalho veremos os retratos de fase, no disco de Poincaré, das formas normais locais das singularidades simétricas dos campos reversíveis do tipo (2; 0) e (2; 1) de baixa codimensão; uma aplicação da Teoria da Média ...
Behavioural Analysis of a Nonlinear Mechanical System Using Transient Trajectories
(2003-12-08)
This work aims at a better comprehension of the features of the solution surface of a dynamical system presenting a numerical procedure based on transient trajectories. For a given set of initial conditions an analysis is ...
ORGANIZAÇÃO ESPAÇO TEMPORAL DO ROLAMENTO PARA FRENTE
(UFRGS, 2007)
The geometry of quadratic polynomial differential systems with a finite and an infinite Saddle-Node (C)
(World Scientific PublishingSingapore, 2015-03)
Planar quadratic differential systems occur in many areas of applied mathematics. Although more than one thousand papers have been written on these systems, a complete understanding of this family is still missing. Classical ...
Classificação de singularidades semi- hiperbólicas e nilpotentes de campos planares analíticos
(Universidade Federal de Santa MariaBrasilMatemáticaUFSMPrograma de Pós-Graduação em MatemáticaCentro de Ciências Naturais e Exatas, 2017-07-12)
In this work, we present some results of Qualitative Theory of Planar Ordinary Differential Equations employed in the investigation of the behavior of solutions in the neighborhood of semi-hyperbolic and nilpotent singularities.
Normal forms and global phase portraits of quadratic and cubic integrable vector fields having two nonconcentric circles as invariant algebraic curves
(2017-07-03)
In this paper, we give the normal form of all planar polynomial vector fields of degree d ≤ 3 having two nonconcentric circles C1 and C2 as invariant algebraic curves and the function H=Cβ 1 Cα 2, with α and β real values, ...
Retratos de fase de uma família de sistemas quadráticos planares integráveis com duas parábolas invariantes
(Universidade Federal de Santa MariaBrasilMatemáticaUFSMPrograma de Pós-Graduação em MatemáticaCentro de Ciências Naturais e Exatas, 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 ...