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Birth Of Limit Cycles For A Class Of Continuous And Discontinuous Differential Systems In (d+2)-dimension
(Taylor & Francis LtdAbingdon, 2016)
Bifurcation of limit cycles from a centre in R-4 in resonance 1:N
(Taylor & Francis Ltd, 2009-01-01)
For every positive integer N >= 2 we consider the linear differential centre (x) over dot = Ax in R-4 with eigenvalues +/- i and +/- Ni. We perturb this linear centre inside the class of all polynomial differential systems ...
Bifurcation of limit cycles from a centre in R-4 in resonance 1:N
(Taylor & Francis Ltd, 2009-01-01)
For every positive integer N >= 2 we consider the linear differential centre (x) over dot = Ax in R-4 with eigenvalues +/- i and +/- Ni. We perturb this linear centre inside the class of all polynomial differential systems ...
Existence and uniqueness of limit cycles for generalized phi-Laplacian Lienard equations
(Elsevier B.V., 2016-07-15)
The Lienard equation x + f (x)x' + g(x) = 0 appears as a model in many problems of science and engineering. Since the first half of the 20th century, many papers have appeared providing existence and uniqueness conditions ...
Birth of limit cycles from a 3D triangular center of a piecewise smooth vector field
(2017-01-01)
We consider a piecewise smooth vector field in R3, where the switching set is on an algebraic variety expressed as the zero of a Morse function.We depart from a model described by piecewise constant vector fields with a ...
Study of the Kondo and high-temperature limits of the slave-boson and X-boson methods
(Elsevier Science BvAmsterdamHolanda, 2006)
Reflexões acerca da Lei de Improbidade Administrativa: o prazo prescricional aplicável aos empregados públicos da Petrobras que exercem cargos comissionados na Companhia
(2019)
O presente artigo visa analisar qual seria o prazo prescricional aplicável às Ações Civis Públicas de Improbidade Administrativa contra agentes públicos que, ao mesmo tempo, são empregados públicos da Petrobrás e exercem ...
Bifurcation of limit cycles from a centre in R-4 in resonance 1:N
(Taylor & Francis Ltd, 2014)