Results 21 to 30 of about 494,012 (266)

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.
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On the generic nonexistence of first integrals [PDF]

Proceedings of the American Mathematical Society, 1986
The property of having no C n {C^n} first integrals other than constants is shown to be generic in Diff r ( M ) {\operatorname {Diff} ^r}(M) for each r = 1 , 2 ,
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On the topology of foliations with a first integral [PDF]

Boletim da Sociedade Brasileira de Matem�tica, 2000
31 ...
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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
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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
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On the first-return integrals

Journal of Mathematical Analysis and Applications, 2007
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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First integrals of the Maxwell–Bloch system [PDF]

Comptes Rendus. Mathématique, 2020
We investigate the analytic, rational and C 1 first integrals of the Maxwell–Bloch system
Kaiyin Huang, Shaoyun Shi, Wenlei Li
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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
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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
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The Global Dynamics of the Painlevé–Gambier Equations XVIII, XXI, and XXII

Mathematics
In this paper, we describe the global dynamics of the Painlevé–Gambier equations numbered XVIII: x″−(x′)2/(2x)−4x2=0, XXI: x″−3(x′)2/(4x)−3x2, and XXII: x″−3(x′)2/(4x)+1=0.
Jie Li, Jaume Llibre
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