Word problems related to periodic solutions of a non-autonomous system

1990 ◽  
Vol 108 (1) ◽  
pp. 127-151 ◽  
Author(s):  
James Devlin
Keyword(s):  
Periodic Solutions ◽  
Limit Cycles ◽  
Word Problems ◽  
Autonomous System ◽  
Homogeneous Polynomials ◽  
Image Position ◽  
Abstract Formulation

In this paper, we develop an abstract formulation of a problem which arises in the investigation of the number of limit cycles of systems of the formwhere p and q are homogeneous polynomials. This is part of the much wider study of Hilbert's sixteenth problem, in which information is sought about the number of limit cycles of systems of the formwhere P and Q are polynomials, and their possible configurations.

Word problems related to derivatives of the displacement map

1991 ◽  
Vol 110 (3) ◽  
pp. 569-579 ◽  
Author(s):  
J. Devlin
Keyword(s):  
Periodic Solutions ◽  
Word Problem ◽  
Word Problems ◽  
Abstract Word ◽  
Local Problem ◽  
Image Position ◽  
Derivatives Of

In [6], we considered the equationwhere z ∈ ℂ and the pi are real-valued functions; abstract word-problem concepts and techniques were applied to the local problem of the bifurcation of periodic solutions out of the solution Z ≡ 0. This paper is a sequel to [6]; we present an extension of certain concepts given in that paper, and give a global version of some of our word-problem results.

Liénard systems with several limit cycles

1987 ◽  
Vol 102 (3) ◽  
pp. 565-572 ◽  
Author(s):  
N. G. Lloyd
Keyword(s):  
Periodic Solutions ◽  
Limit Cycles ◽  
Bounded Solution ◽  
A Priori ◽  
Degree Theory ◽  
Extensive Literature ◽  
Liénard Systems ◽  
A Priori Bound ◽  
Image Position

There is an extensive literature on Liénard's equationand numerous criteria for the existence of limit cycles have been developed: see the survey of Staude[7], for example. Broadly speaking, such results are proved in one of two ways: a bounded solution is shown to exist and the Poincaré–Bendixson theorem used, or an ‘a priori’ bound for periodic solutions is obtained and the methods of degree theory utilized.

On the Liénard system which has no periodic solutions

1993 ◽  
Vol 113 (2) ◽  
pp. 413-422 ◽  
Author(s):  
Jitsuro Sugie ◽  
Toshiaki Yoneyama
Keyword(s):  
Periodic Solutions ◽  
Limit Cycles ◽  
Sufficient Conditions ◽  
Liénard Equation ◽  
Liénard System ◽  
Lienard System ◽  
Generalized Liénard Equation ◽  
Existence Of Periodic Solutions ◽  
Image Position ◽  
Lienard Equation

The problem of periodicity of solutions of the generalized Liénard equationhas attracted much attention. Many efforts have been made to give sufficient conditions to guarantee the existence and the uniqueness of periodic solutions (limit cycles) of (1·1). There are also some papers on the number of limit cycles of (1·1) (see, for example, [3, 5, 6, 13]). However, there are only a few results on non-existence of periodic solutions of (1·1).

The number of small-amplitude limit cycles of Liénard equations

1984 ◽  
Vol 95 (2) ◽  
pp. 359-366 ◽  
Author(s):  
T. R. Blows ◽  
N. G. Lloyd
Keyword(s):  
Differential Equations ◽  
Periodic Solutions ◽  
Limit Cycles ◽  
Existence And Uniqueness ◽  
Small Amplitude ◽  
Extensive Literature ◽  
Second Order Differential Equations ◽  
Liénard Equations ◽  
Comprehensive Survey ◽  
Image Position

We consider second order differential equations of Liénard type:Such equations have been very widely studied and arise frequently in applications. There is an extensive literature relating to the existence and uniqueness of periodic solutions: the paper of Staude[6] is a comprehensive survey. Our interest is in the number of periodic solutions of such equations.

On the Analysis of Hopf Bifurcation Associated with a Two-Fold Zero Eigenvalue, Part 1: Autonomous System

1999 ◽  
Vol 121 (1) ◽  
pp. 101-104 ◽  
Author(s):  
M. Moh’d ◽  
K. Huseyin
Keyword(s):  
Hopf Bifurcation ◽  
Limit Cycles ◽  
Autonomous System ◽  
Periodic Motions ◽  
Zero Eigenvalue ◽  
The Family ◽  
Dynamic Bifurcations ◽  
Formula Type

The static and dynamic bifurcations of an autonomous system associated with a twofold zero eigenvalue (of index one) are studied. Attention is focused on Hopf bifurcation solutions in the neighborhood of such a singularity. The family of limit cycles are analyzed fully by applying the formula type results of the Intrinsic Harmonic Balancing method. Thus, parameter-amplitude and amplitude-frequency relationships as well as an ordered form of approximations for the periodic motions are obtained explicitly. A verification technique, with the aid of MAPLE, is used to show the consistency of ordered approximations.

scholarly journals The Convergence of the Series in Mathieu's Functions

1914 ◽  
Vol 33 ◽  
pp. 25-30 ◽  
Author(s):  
G. N. Watson
Keyword(s):  
Integral Equation ◽  
Periodic Solutions ◽  
Suitable Function ◽  
Elegant Method ◽  
Mathieu’S Equation ◽  
Image Position

Periodic solutions of Mathieu's equation*where a is a suitable function of q have recently been discussed in several papers in these Proceedings. An elegant method of determining these solutions, which are writtenwas given by Whittaker, † who obtained the integral equationwhich is satisfied by periodic solutions of Mathieu's equation.

scholarly journals ON PERIODIC SOLUTIONS OF LIÉNARD TYPE EQUATIONS

2013 ◽  
Vol 18 (5) ◽  
pp. 708-716 ◽  
Author(s):  
Svetlana Atslega ◽  
Felix Sadyrbaev
Keyword(s):  
Periodic Solutions ◽  
Limit Cycle ◽  
Limit Cycles ◽  
Type Equation ◽  
Convex Shape ◽  
Period Annulus ◽  
Conservative Equation ◽  
Liénard Type Equation

The Liénard type equation x'' + f(x, x')x' + g(x) = 0 (i) is considered. We claim that if the associated conservative equation x'' + g(x) = 0 has period annuli then a dissipation f(x, x') exists such that a limit cycle of equation (i) exists in a selected period annulus. Moreover, it is possible to define f(x, x') so that limit cycles appear in all period annuli. Examples are given. A particular example presents two limit cycles of non-convex shape in two disjoint period annuli.

The number of limit cycles of certain polynomial differential equations

1984 ◽  
Vol 98 (3-4) ◽  
pp. 215-239 ◽  
Author(s):  
T. R. Blows ◽  
N. G. Lloyd
Keyword(s):  
Differential Equations ◽  
Limit Cycles ◽  
Small Amplitude ◽  
Two Dimensional ◽  
Differential Systems ◽  
Quadratic Systems ◽  
Polynomial Differential Equations ◽  
Image Position ◽  
Cubic Systems

SynopsisTwo-dimensional differential systemsare considered, where P and Q are polynomials. The question of interest is the maximum possible numberof limit cycles of such systems in terms of the degree of P and Q. An algorithm is described for determining a so-called focal basis; this can be implemented on a computer. Estimates can then be obtained for the number of small-amplitude limit cycles. The technique is applied to certain cubic systems; a class of examples with exactly five small-amplitude limit cycles is constructed. Quadratic systems are also considered.

Degree, quaternions and periodic solutions

2021 ◽  
Vol 379 (2191) ◽  
pp. 20190378
Author(s):  
Jean Mawhin
Keyword(s):  
Fixed Point ◽  
Periodic Solutions ◽  
Difference Equations ◽  
Topological Degree ◽  
Coincidence Degree ◽  
Degree Theory ◽  
Brouwer Degree ◽  
Homogeneous Polynomials ◽  
Theme Issue ◽  
Existence And Multiplicity

The paper computes the Brouwer degree of some classes of homogeneous polynomials defined on quaternions and applies the results, together with a continuation theorem of coincidence degree theory, to the existence and multiplicity of periodic solutions of a class of systems of quaternionic valued ordinary differential equations. This article is part of the theme issue ‘Topological degree and fixed point theories in differential and difference equations’.

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