Results 81 to 90 of about 143 (134)

Zeitschrift für angewandte Mathematik und Physik ZAMP A combined variational-topological approach for dispersion-managed solitons in optical fibers

, 2010
. We derive some sufficient conditions for the existence of dispersion-managed solitons in a nonlinear Schrödinger equation with periodically varying coefficients.
Robert Hakl, Pedro J Torres
core  

Non-hyperbolic P-Invariant Closed Characteristics on Partially Symmetric Compact Convex Hypersurfaces

Advanced Nonlinear Studies, 2018
Let n≥2{n\geq 2} be an integer, P=diag⁢(-In-κ,Iκ,-In-κ,Iκ){P=\mathrm{diag}(-I_{n-\kappa},I_{\kappa},-I_{n-\kappa},I_{\kappa})} for some integer κ∈[0,n]{\kappa\in[0,n]}, and let Σ⊂ℝ2⁢n{\Sigma\subset{\mathbb{R}}^{2n}} be a partially symmetric compact ...
Liu Hui, Zhu Gaosheng
doaj   +1 more source

Periodic Impact Motions at Resonance of a Particle Bouncing on Spheres and Cylinders

Advanced Nonlinear Studies, 2017
We investigate the existence of periodic trajectories of a particle, subject to a central force, which can hit a sphere or a cylinder. We will also provide a Landesman–Lazer-type condition in the case of a nonlinearity satisfying a double resonance ...
Sfecci Andrea
doaj   +1 more source

Periodic solutions to Mckean–Vlasov SDEs under Lyapunov conditions

Advances in Nonlinear Analysis
In this article, we investigate the existence of periodic solutions to McKean–Vlasov stochastic differential equations subject to periodic Lyapunov conditions with distributional dependence.
Ma Jun, Ji Shuguan
doaj   +1 more source

Periodic impulsive fractional differential equations

Advances in Nonlinear Analysis, 2017
This paper deals with the existence of periodic solutions of fractional differential equations with periodic impulses. The first part of the paper is devoted to the uniqueness, existence and asymptotic stability results for periodic solutions of ...
Fečkan Michal, Wang Jin Rong
doaj   +1 more source

One-dimensional singular problems involving the p-Laplacian and nonlinearities indefinite in sign

Advances in Nonlinear Analysis, 2016
Let Ω be a bounded open interval, let p>1${p>1}$ and γ>0${\gamma>0}$, and let m:Ω→ℝ${m:\Omega\rightarrow\mathbb{R}}$ be a function that may change sign in Ω.
Kaufmann Uriel, Medri Iván
doaj   +1 more source

Branches of Forced Oscillations Induced by a Delayed Periodic Force

Advanced Nonlinear Studies, 2019
We study global continuation properties of the set of T-periodic solutions of parameterized second order delay differential equations with constant time lag on smooth manifolds. We apply our results to get multiplicity of T-periodic solutions.
Calamai Alessandro, Pera Maria Patrizia, Spadini Marco   +2 more
doaj   +1 more source

Bifurcation analysis of the predator-prey model with the Allee effect in the predator. [PDF]

J Math Biol, 2021
Sen D, Ghorai S, Banerjee M, Morozov A.
europepmc   +1 more source

Global Dynamics of Neural Nets With Infinite Gain.

, 1999
We consider a model of neural and gene networks where the nonlinearities in the system of differential equations are discontinuous and piecewise constant.
Tomás Gedeon
core  

PERMANENCE IN A DISCRETE n-SPECIES NON-AUTONOMOUS LOTKA–VOLTERRA COMPETITIVE SYSTEMS WITH INFINITE DELAYS AND FEEDBACK CONTROL

In this paper, we deal with a discrete n-species non-autonomous Lotka–Volterra competitive systems with infinite delays and feedback control, obtain sufficient conditions for the permanence of the systems.Discrete, infinite delay, Lotka–Volterra ...
XIAOXING CHEN
core