Results 41 to 50 of about 220 (84)

Non-trivial, non-negative periodic solutions of a system of singular-degenerate parabolic equations with nonlocal terms [PDF]

open access: yes, 2014
We study the existence of non-trivial, non-negative periodic solutions for systems of singular-degenerate parabolic equations with nonlocal terms and satisfying Dirichlet boundary conditions.
Fragnelli, Genni   +3 more
core   +2 more sources

High-energy solutions for coupled Schrödinger systems with critical growth and lack of compactness

open access: yesAdvances in Nonlinear Analysis
This article deals with the existence of high-energy positive solutions for the following coupled Schrödinger system with critical exponent: −Δu+V1(x)u=μ1u3+βuv2,x∈Ω,−Δv+V2(x)v=βu2v+μ2v3,x∈Ω,u,v∈D01,2(Ω)\left\{\begin{array}{l}-\Delta u+{V}_{1}\left(x)u={\
Guan Wen, Wang Da-Bin, Xie Huafei
doaj   +1 more source

Separable solutions of quasilinear Lane-Emden equations [PDF]

open access: yes, 2011
For $0 < p-1 < q$ and $\ge=\pm 1$, we prove the existence of solutions of $-\Gd_pu=\ge u^q$ in a cone $C_S$, with vertex 0 and opening $S$, vanishing on $\prt C_S$, under the form $u(x)=|x|^\gb\gw(\frac{x}{|x|})$.
Alessio Porretta   +4 more
core   +3 more sources

Existence, nonexistence and multiplicity results for some beam equations [PDF]

open access: yes, 2007
This paper studies some fourth order nonlinear fully equations with a parameter s ∈ R, with two point boundary conditions. These problems model several phenomena, such as, a cantilevered beam with a linear relation between the curvature and the shear ...
Minhós, Feliz Manuel
core  

T-periodic dynamics in a 3D delayed quasispecies model

open access: yesJournal of Biological Dynamics
We study periodic dynamics and error-threshold behavior in a delayed quasispecies model consisting of a master sequence [Formula: see text] and two mutant populations [Formula: see text].
Nolbert Morales   +2 more
doaj   +1 more source

Limit cycles of linear vectors on manifolds [PDF]

open access: yes, 2016
Agraïments: The second author is partially supported by NNSF of China grant number 11271252, by RFDP of Higher Education of China grant number 20110073110054, and by innovation program of Shanghai municipal education commission grant 15ZZ012.It is well ...
Llibre, Jaume, Zhang, Xiang
core   +1 more source

A Hartman-Nagumo type condition for a class of contractible domains [PDF]

open access: yes, 2013
We generalize an existence result on second order systems with a nonlinear term satisfying the so-called Hartman-Nagumo condition. The generalization is based on the use of Gauss second fundamental form and continuation techniques.Fil: Amster, Pablo ...
Amster, Pablo Gustavo   +1 more
core  

Nontrivial solutions of quasilinear elliptic equations with natural growth term

open access: yes, 2017
We prove the existence of multiple solutions for a quasilinear elliptic equation containing a term with natural growth, under assumptions that are invariant by diffeomorphism.
Degiovanni, Marco, Pluda, Alessandra
core   +1 more source

Existence and multiplicity of solutions in fourth order BVPs with unbounded nonlinearities [PDF]

open access: yes, 2013
In this work the authors present some existence, non-existence and location results of the problem composed of a fourth order fully nonlinear equation with a parameter.In this work it is applied an Ambrosetti-Prodi type approach, with some new features ...
Fialho, João, Minhós, Feliz
core  

Nonlinear Variational Inequalities Depending on a Parameter [PDF]

open access: yes, 1995
This paper develops the results announced in the Note [14]. Using an eigenvalue problem governed by a variational inequality, we try to unify the theory concerning the post-critical equilibrium state of a thin elastic plate subjected to unilateral ...
Goeleven, D., Théra, M.
core  

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