Results 21 to 30 of about 14,686,178 (292)

The solution of some persistent $p : -q$ resonant center problems

Electronic Journal of Qualitative Theory of Differential Equations, 2018
The notion of $p:-q$ resonant center was introduced recently and studied by several authors. In this paper we generalize the notion of a persistent center to a persistent $p:-q $ resonant center and find conditions for existence of a persistent $p:-q ...
Maja Zulj, Brigita Ferčec, Matej Mencinger   +2 more
doaj   +1 more source

On the topology of foliations with a first integral [PDF]

Boletim da Sociedade Brasileira de Matem�tica, 2000
31 ...
openaire   +2 more sources

Integral group ring of the first Mathieu simple group [PDF]

, 2007
We investigate the classical Zassenhaus conjecture for the normalized unit group of the integral group ring of the simple Mathieu group M11.
Bódi, Viktor, Bovdi, Victor, Konovalov, A. B., Alexander Konovalov, Victor Bovdi, Konovalov, Alexander   +5 more
core   +2 more sources

Darboux and Analytic First Integrals of Kingni–Jafari System with Only One Stable Equilibrium Point.

Zanco Journal of Pure and Applied Sciences, 2020
In this paper, we illustrate by an evidence that the Kingni–Jafari differential system where  and   are real parameters has no Darboux and rational first integrals for any value of   Furthermore, we show that this system has no global first integrals ...
Shno F. Muhammed, Niazy H. Hussein, Azad I. Amen   +2 more
doaj   +3 more sources

Polynomial Inverse Integrating Factors, First Integral and Non-Existence of Limit Cycles in the Plane for Quadratic Systems

Science Journal of University of Zakho, 2017
The main purpose of this paper is to study the existence of polynomial inverse integrating factor and first integral, and non-existence of limit cycles for all systems. Furthermore, we consider some applications.
Ahmed M. Hussien
doaj   +1 more source

On the first-return integrals

Journal of Mathematical Analysis and Applications, 2007
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +3 more sources

On foliations with rational first integral [PDF]

Proyecciones (Antofagasta), 2017
We use the Kodaira’s classification of relatively minimal elliptic fi- brations to prove that a holomorphic foliation in CP2 with a dicritical compact elliptic curve has rational first integral.
openaire   +2 more sources

Vibration of the Liénard Oscillator with Quadratic Damping and Constant Excitation

Mathematics
In this paper, the Liénard oscillator with nonlinear deflection, quadratic damping, and constant excitation is considered. In general, there is no analytic solution for the Liénard equation.
Livija Cveticanin, Nicolae Herisanu, Gamal Mohamed Ismail, Miodrag Zukovic   +3 more
doaj   +1 more source

Research of a three-dimensional nonlinear dynamic system describing the process of two-level assimilation

4 open, 2020
The work proposes a new general nonlinear mathematical model describing the social process of two-level assimilation taking into account quadratic members of self-restriction of population growth of three sides.
Chilachava Temur, Pochkhua George
doaj   +1 more source

Noetherian first integrals [PDF]

Journal of Nonlinear Mathematical Physics, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Leach, P. G. L., Flessas, G. P.
openaire   +2 more sources