Results 31 to 40 of about 16,824,350 (311)

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

Concavity and bounds involving generalized elliptic integral of the first kind

Journal of Mathematical Inequalities, 2021
. In the article, we provide a suf fi cient condition for value range of the constant c such that the function x → K a ( √ x ) / log ( c / √ 1 − x ) is strictly concave on ( 0 , 1 ) for a ∈ ( 0 , 1 / 2 ] , which generalize a very recently obtained result ...
Tie-hong Zhao, Miao-Kun Wang, Yuming Chu
semanticscholar   +1 more source

GRB 021125: The first GRB imaged by INTEGRAL [PDF]

Astronomy & Astrophysics, 2003
4 pages, 5 figures.
Malaguti, G., Bazzano, A., Beckmann, V., Bird, A., Del Santo, M., Di Cocco, G., Foschini, L., Goldoni, P., Götz, D., Mereghetti, S., Paizis, A., Segreto, A., Skinner, G., Ubertini, P., Kienlin, A.   +14 more
openaire   +4 more sources

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
doaj   +1 more source

Task-First or Context-First? Tool Integration Revisited [PDF]

2009 IEEE/ACM International Conference on Automated Software Engineering, 2009
If software engineering tools are not "properly integrated", they can reduce engineers' productivity. Associating and retrieving information scattered across the tools become unsystematic and inefficient. Our work provides empirical evidence on what is a "poor" and a "proper" tool integration, focusing on practitioners' perspectives.
openaire   +1 more source

On the dynamics of the autonomous Duffing–Holmes oscillator

Nonlinear Analysis
The autonomous Duffing–Holmes oscillator ẋ = y,  ẏ = x – x3 + by – kz,  ż = w(y – z), depending on the three parameters b, k, and w, has been studied previously by several authors who showed that for certain parameter values, it exhibits chaotic ...
Érika Diz-Pita, Jaume Jaume Llibre, M. Victoria Otero-Espinar   +2 more
doaj   +1 more source

Liouvillian first integrals of differential equations [PDF]

Transactions of the American Mathematical Society, 1989
Liouvillian functions are functions that are built up from rational functions using exponentiation, integration, and algebraic functions. We show that if a system of differential equations has a generic solution that satisfies a liouvillian relation, that is, there is a liouvillian function of several variables vanishing on the ...
openaire   +2 more sources