Results 71 to 80 of about 494 (174)
A class of degenerate elliptic eigenvalue problems
Advances in Nonlinear Analysis, 2013 We consider a general class of eigenvalue problems where the leading elliptic term corresponds to a convex homogeneous energy function that is not necessarily differentiable.
Lucia Marcello, Schuricht Friedemann
doaj +1 more source
Coordinating Food Security With Carbon Reduction and Sequestration in China
Food and Energy Security, Volume 15, Issue 1, January/February 2026.This study examines the coupling coordination between food security and agricultural carbon reduction and sequestration in China. Using a coupling coordination model and GTWR analysis, we reveal significant spatiotemporal heterogeneity and identify key drivers for achieving coordinated low‐carbon agricultural development.
Huanhuan He, Hui Wei
wiley +1 more source
Existence of multiple solutions for quasilinear diagonal elliptic systems
Electronic Journal of Differential Equations, 1999 Nonsmooth-critical-point theory is applied in proving multiplicity results for the quasilinear symmetric elliptic system $$ -sum_{i,j=1}^{n}D_j(a^{k}_{ij}(x,u)D_iu_k)+ {1over 2}sum_{i,j=1}^{n}sum_{h=1}^N D_{s_k}a^{h}_{ij}(x,u)D_iu_hD_ju_h=g_k(x,u ...
Marco Squassina
doaj
Three solutions for second-order impulsive differential inclusions with Sturm-Liouville boundary conditions via nonsmooth critical point theory [PDF]
, 2016 A second-order impulsive differential inclusion with Sturm-Liouville boundary conditions is studied. By using a nonsmooth version of a three critical point theorem of Ricceri, the existence of three solutions is ...
Kong, Lingju +3 more
core
On gamma-convergence for problems of jumping type
Electronic Journal of Differential Equations, 2003 The convergence of critical values for a sequence of functionals $(f_h)$ $Gamma$-converging to a functional $f_{infty}$ is studied. These functionals are related to a classical ``jumping problem'', in which the position of two real parameters $alpha,eta$
Alessandro Groli
doaj
Higher-Order Energy Expansions and Spike Locations [PDF]
, 2004 We consider the following singularly perturbed semilinear elliptic problem: (I)\left\{ \begin{array}{l} \epsilon^{2} \Delta u - u + f(u)=0 \ \ \mbox{in} \ \Omega, \\ u>0 \ \ \mbox{in} \ \ \Omega \ \ \mbox{and} \ \frac{\partial u}{\partial \nu}
Winter, M, Wei, J
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Sign-Changing Solutions for Nonlinear Elliptic Problems Depending on Parameters
International Journal of Differential Equations, 2010 The study of multiple solutions for quasilinear elliptic problems under Dirichlet or nonlinear Neumann type boundary conditions has received much attention over the last decades.
Siegfried Carl, Dumitru Motreanu
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Existence and multiplicity of solutions for the noncoercive Neumann p-Laplacian
Electronic Journal of Differential Equations, 2010 We consider a nonlinear Neumann problem driven by the p-Laplacian differential operator with a nonsmooth potential (hemivariational inequality). Using variational techniques based on the smooth critical point theory and the second deformation theorem,
Nikolaos S. Papageorgiou +1 more
doaj
Perturbations of even nonsmooth functionals [PDF]
, 1995 An eigenvalue problem for elliptic variational inequalities is considered. The existence of multiple solutions is proved, when the operator is a small (non-odd) perturbation of an odd operator.
Degiovanni M.
core
Unbounded critical points for a class of lower semicontinuous functionals [PDF]
, 2004 In this paper we prove existence and multiplicity results of unbounded critical points for a general class of weakly lower semicontinuous functionals. We will apply a nonsmooth critical point theory developed by Degiovanni et al.
PELLACCI, Benedetta +5 more
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