Results 21 to 30 of about 142,315 (286)

On nonnegative radial entire solutions of second order quasilinear elliptic systems

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2002
In this article we consider the second order quasilinear elliptic system of the form $$\Delta_{p_i} u_i=H_i(|x|)u_{i+1}^{\alpha_i}, x\in \mathbb{R}^N, i=1,2,...,m$$ with nonnegative continuous function $H_i$.
T. Teramoto
doaj   +1 more source

The $L^p$ Dirichlet boundary problem for second order Elliptic Systems with rough coefficients [PDF]

open access: yes, 2020
Given a domain above a Lipschitz graph, we establish solvability results for strongly elliptic second-order systems in divergence-form, allowed to have lower-order (drift) terms, with $L^p$-boundary data for $p$ near $2$ (more precisely, in an interval ...
Dindoš, Martin   +2 more
core   +3 more sources

Existence of Three Solutions for Nonlinear Operator Equations and Applications to Second-Order Differential Equations

open access: yesJournal of Function Spaces, 2021
The existence of three solutions for nonlinear operator equations is established via index theory for linear self-adjoint operator equations, critical point reduction method, and three critical points theorems obtained by Brezis-Nirenberg, Ricceri, and ...
Mingliang Song, Shuyuan Mei
doaj   +1 more source

Slate: extending Firedrake's domain-specific abstraction to hybridized solvers for geoscience and beyond [PDF]

open access: yesGeoscientific Model Development, 2020
Within the finite element community, discontinuous Galerkin (DG) and mixed finite element methods have become increasingly popular in simulating geophysical flows.
T. H. Gibson   +3 more
doaj   +1 more source

Vanishing viscosity limits of mixed hyperbolic–elliptic systems arising in multilayer channel flows [PDF]

open access: yes, 2015
This study considers the spatially periodic initial value problem of 2 × 2 quasilinear parabolic systems in one space dimension having quadratic polynomial flux functions.
Papaefthymiou, ES, Papageorgiou, DT
core   +1 more source

NONTRIVIAL RADIAL SOLUTIONS FOR A SYSTEM OF SECOND ORDER ELLIPTIC EQUATIONS

open access: yesJournal of Applied Analysis & Computation, 2022
Summary: In this paper we use the topological degree and the Krein-Rutman theorem to investigate the existence of nontrivial radial solutions for a system of second order elliptic equations. Our results are obtained under some conditions involving the eigenvalues of a relevant linear operator.
Zhang, Haiyan, Xu, Jiafa, O'Regan, Donal
openaire   +2 more sources

On energy functionals for second order elliptic systems with constant coefficients

open access: yesUfa Mathematical Journal, 2022
12 ...
Astamur Olegovich Bagapsh   +1 more
openaire   +2 more sources

Nonzero Positive Solutions of Elliptic Systems with Gradient Dependence and Functional BCs

open access: yesAdvanced Nonlinear Studies, 2020
We discuss, by topological methods, the solvability of systems of second-order elliptic differential equations subject to functional boundary conditions under the presence of gradient terms in the nonlinearities.
Biagi Stefano   +2 more
doaj   +1 more source

On Boundary Value Problems for Elliptic Systems of Second-Order Equations in Divergence Form [PDF]

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки, 2015
Solvability conditions of various boundary value problems for elliptic systems of second-order equations in divergence form are adduced. The effect of domain shape on the solvability of nonclassical problems of rigid contact and normal load is ...
M.M. Karchevsky, R.R. Shagidullin
doaj  

The Kato Square Root Problem for Mixed Boundary Conditions [PDF]

open access: yes, 2013
We consider the negative Laplacian subject to mixed boundary conditions on a bounded domain. We prove under very general geometric assumptions that slightly above the critical exponent $\frac{1}{2}$ its fractional power domains still coincide with ...
Egert, Moritz   +2 more
core   +3 more sources

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