Results 11 to 20 of about 203 (82)

Boundary regularity results for minimisers of convex functionals with (p, q)-growth

open access: yesAdvances in Nonlinear Analysis, 2023
We prove improved differentiability results for relaxed minimisers of vectorial convex functionals with (p,q)\left(p,q)-growth, satisfying a Hölder-growth condition in xx. We consider both Dirichlet and Neumann boundary data.
Irving Christopher, Koch Lukas
doaj   +1 more source

A strong comparison principle for positive solutions of degenerate elliptic equations

open access: yesDifferential and Integral Equations, 2000
A strong comparison principle (SCP, for brevity) is obtained for nonnegative weak solutions u ∈ W 1,p 0 (Ω) of the following class of quasilinear elliptic boundary value problems, (P ) −div(a(x,∇u))− b(x, u) = f(x) in Ω; u = 0 on ∂Ω. Here, p ∈ (1,∞) is a
M. Cuesta, P. Takáč
semanticscholar   +1 more source

Existence of solutions for a double-phase variable exponent equation without the Ambrosetti-Rabinowitz condition

open access: yesAdvances in Nonlinear Analysis, 2023
The article deals with the existence of a pair of nontrivial nonnegative and nonpositive solutions for a nonlinear weighted quasilinear equation in RN{{\mathbb{R}}}^{N}, which involves a double-phase general variable exponent elliptic operator A{\bf{A}}.
Liu Jingjing, Pucci Patrizia
doaj   +1 more source

Regularity results for p-Laplacians in pre-fractal domains

open access: yesAdvances in Nonlinear Analysis, 2018
We study obstacle problems involving p-Laplace-type operators in non-convex polygons. We establish regularity results in terms of weighted Sobolev spaces. As applications, we obtain estimates for the FEM approximation for obstacle problems in pre-fractal
Capitanelli Raffaela   +2 more
doaj   +1 more source

On the best constant for Hardy's inequality in $\mathbb{R}^n$

open access: yes, 1998
Let Ω be a domain in IR and p ∈ (1,∞). We consider the (generalized) Hardy inequality ∫ Ω |∇u|p ≥ K ∫ Ω |u/δ|p, where δ(x) = dist (x, ∂Ω). The inequality is valid for a large family of domains including all bounded domains with Lipschitz boundary.
M. Marcus, V. Mizel, Y. Pinchover
semanticscholar   +1 more source

HOMOGENIZATION OF THE SYSTEM OF HIGH‐CONTRAST MAXWELL EQUATIONS

open access: yesMathematika, Volume 61, Issue 2, Page 475-500, May 2015., 2015
We study the system of Maxwell equations for a periodic composite dielectric medium with components whose dielectric permittivities have a high degree of contrast between each other. We assume that the ratio between the permittivities of the components with low and high values of is of the order , where is the period of the medium.
Kirill Cherednichenko, Shane Cooper
wiley   +1 more source

A stochastic differential game for the inhomogeneous ∞-Laplace equation [PDF]

open access: yes, 2008
Given a bounded C 2 domain GR m and functions g 2 C(@G, R) and h 2 C( ¯ G, R \ {0}), let u denote the unique viscosity solution to the equation 2 ∞u = h in G with boundary data g.
R. Atar, A. Budhiraja
semanticscholar   +1 more source

[Retracted] Nonlinear eigenvalue problems in Sobolev spaces with variable exponent

open access: yesJournal of Function Spaces, Volume 4, Issue 3, Page 225-242, 2006., 2006
We study the boundary value problem −div?((|?u|p1(x)−2 + |?u|p2(x)−2)?u) = f(x, u) in O, u = 0 on ?O, where O is a smooth bounded domain in RN. We focus on the cases when f±(x, ??u) = ±(−?|u|m(x)−2u + |u|q(x)−2u), where m(x)?max??{p12(x),p(x)}
Teodora-Liliana Dinu, George Isac
wiley   +1 more source

Ni-Serrin type equations arising from capillarity phenomena with non-standard growth

open access: yes, 2013
In the present paper, in view of the variational approach, we discuss a Ni-Serrin type equation involving non-standard growth condition and arising from the capillarity phenomena.
M. Avci
semanticscholar   +1 more source

Solvability of nonlinear Dirichlet problem for a class of degenerate elliptic equations

open access: yesAbstract and Applied Analysis, Volume 2004, Issue 3, Page 205-214, 2004., 2004
We prove an existence result for solution to a class of nonlinear degenerate elliptic equation associated with a class of partial differential operators of the form Lu(x)=∑i,j=1nDj(aij(x)Diu(x)), with Dj = ∂/∂xj, where aij : Ω → ℝ are functionssatisfying suitable hypotheses.
Albo Carlos Cavalheiro
wiley   +1 more source

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