Existence of solutions to indefinite quasilinear elliptic problems of --Laplacian type.
Under some assumptions on the function p(x), we obtain global gradient estimates for weak solutions of the p(x)-Laplacian type equation in .
A sharp estimate for the decreasing rearrangement of the length of the gradient of solutions to a class of nonlinear Dirichlet and Neumann elliptic boundary value problems is established under weak regularity assumptions on the domain. As a consequence, the problem of gradient bounds in norms depending on global integrability properties is reduced to one-dimensional Hardy-type inequalities. Applications to gradient estimates in Lebesgue, Lorentz, Zygmund, and Orlicz spaces are presented.
Our main purpose is to establish the existence of weak solutions of second order quasilinear elliptic systems ⎧ , x ∈ Ω, ⎨ , x ∈ Ω, ⎩ u = v = 0, x∈ ∂Ω, where 1 < q < p < N and is an open bounded smooth domain. Here λ₁, λ₂, μ ≥ 0 and (i = 1,2) are sign-changing functions, where , , and denotes the p-Laplace operator. We use variational methods.
In this work, by using the Mountain Pass Theorem, we give a result on the existence of solutions concerning a class of nonlocal -Laplacian Dirichlet problems with a critical nonlinearity and small perturbation.
Let be a bounded starshaped domain and consider the -Laplacian problem where is a positive parameter, , and is the critical Sobolev exponent. In this short note we address the question of non-existence for non-trivial solutions to the -Laplacian problem. In particular we show the non-existence of non-trivial solutions to the problem by using a method based on Pohozaev identity.
Let be a smooth bounded domain in and let . We prove here the existence of nonnegative solutions in , to the problemwhere denotes the unit outer normal to , and denotes some function defined as:Moreover, we prove the tight convergence of towards one of the first eingenfunctions for the first Laplacian Operator on when goes to .