Results 1 to 10 of about 134 (130)

Existence and Multiplicity of Periodic Solutions to Indefinite Singular Equations Having a Non-monotone Term with Two Singularities

Advanced Nonlinear Studies, 2019
Efficient conditions guaranteeing the existence and multiplicity of T-periodic solutions to the second order differential equation u′′=h⁢(t)⁢g⁢(u){u^{\prime\prime}=h(t)g(u)} are established.
Hakl Robert, Zamora Manuel
doaj   +1 more source

On the existence of periodic oscillations for pendulum-type equations

Advances in Nonlinear Analysis, 2020
We provide new sufficient conditions for the existence of T-periodic solutions for the ϕ-laplacian pendulum equation (ϕ(x′))′ + k x′ + a sin x = e(t), where e ∈ C͠T.
Cid J. Ángel
doaj   +1 more source

Dynamic behaviors of a Lotka-Volterra type predator-prey system with Allee effect on the predator species and density dependent birth rate on the prey species

Open Mathematics, 2019
A Lotka-Volterra type predator-prey system with Allee effect on the predator species and density dependent birth rate on the prey species is proposed and studied.
Chen Fengde, Guan Xinyu, Huang Xiaoyan, Deng Hang   +3 more
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Infinitely many periodic solutions for ordinary p-Laplacian systems

Advances in Nonlinear Analysis, 2015
Some existence theorems are obtained for infinitely many periodic solutions of ordinary p-Laplacian systems by minimax methods in critical point theory.
Li Chun, Agarwal Ravi P., Tang Chun-Lei
doaj   +1 more source

Existence and Uniqueness of the Solution for the Stochastic Equation of Motion of a Viscous Gas in a Discretized One-Dimensional Domain [PDF]

, 2015
A stochastic equation system corresponding to the description of the motion of a barotropic viscous gas in a discretized one-dimensional domain with a weight regularizing the density is considered.
Benchettah, A., Benseghir, R.
core  

Amplitude Independent Frequency Synchroniser for a Cubic Planar Polynomial System

, 2012
International audienceThe problem of local linearizability of the planar linear center perturbed by cubic non-linearities in all generalities on the system parameters (14 parameters) is far from being solved.
Boussaada, Islam
core   +1 more source

Boundary value problems for integro-differential and singular higher-order differential equations

Open Mathematics
We investigate third-order strongly nonlinear differential equations of the type (Φ(k(t)u″(t)))′=f(t,u(t),u′(t),u″(t)),a.e. on[0,T],\left(\Phi \left(k\left(t){u}^{^{\prime\prime} }\left(t)))^{\prime} =f\left(t,u\left(t),u^{\prime} \left(t),{u}^{^{\prime ...
Anceschi Francesca, Calamai Alessandro, Marcelli Cristina, Papalini Francesca   +3 more
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Existence and multiplicity results for non-autonomous second-order Hamiltonian systems

Advances in Nonlinear Analysis
In this article, using the least action principle and minimax methods in critical point theory, some existence and multiplicity results for periodic solutions of second-order Hamiltonian systems are obtained.
Liu Chungen, Zhong Yuyou
doaj   +1 more source

Dynamics for a discrete competition and cooperation model of two enterprises with multiple delays and feedback controls

Open Mathematics, 2017
This paper is concerned with a competition and cooperation model of two enterprises with multiple delays and feedback controls. With the aid of the difference inequality theory, we have obtained some sufficient conditions which guarantee the permanence ...
Lu Lin, Lian Yi, Li Chaoling
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Positive Periodic Solution for Second-Order Nonlinear Differential Equations with Variable Coefficients and Mixed Delays. [PDF]

Entropy (Basel), 2022
Dai Z, Du B.
europepmc   +1 more source