Now showing items 1-5 of 5
On the periodic solutions of the static, spherically symmetric Einstein-Yang-Mills equations
(Journal of Mathematical Physics, 2012-12-01) [Artigo]
We prove that the static, spherically symmetric Einstein-Yang-Mills equations do not have periodic solutions when r > 0. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4770046]
Algebraic Limit Cycles in Piecewise Linear Differential Systems
(International Journal Of Bifurcation And Chaos, 2018-03-01) [Artigo]
This paper is devoted to study the algebraic limit cycles of planar piecewise linear differential systems. In particular, we present examples exhibiting two explicit hyperbolic algebraic limit cycles, as well as some ...
Center boundaries for planar piecewise-smooth differential equations with two zones
(Journal of Mathematical Analysis and Applications, 2017-01-01) [Artigo]
This paper is concerned with 1-parameter families of periodic solutions of piecewise smooth planar vector fields, when they behave like a center of smooth vector fields. We are interested in finding a separation boundary ...
Limit cycles via higher order perturbations for some piecewise differential systems
(Physica D-nonlinear Phenomena, 2018-05-15) [Artigo]
A classical perturbation problem is the polynomial perturbation of the harmonic oscillator, (x', y') = (-y + epsilon f(x, y, epsilon), x + epsilon g(x, y, epsilon)). In this paper we study the limit cycles that bifurcate ...
No periodic orbits for the type A Bianchi's systems
(Journal Of Nonlinear Mathematical Physics, 2015-01-01) [Artigo]
It is known that the 6 models of Bianchi class A have no periodic solutions. In this article we provide a new, direct, unified and easier proof of this result.