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arXiv 1409.4076math.AP
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Nonlinear elliptic方程与Wolff型内禀势

Nonlinear elliptic equations and intrinsic potentials of Wolff type

Cao Tien Dat, Igor Verbitsky

摘要:

本文给出了模型方程$$-Δ_p u=σ\, u^q \quad \text{on} \, \, \, \R^n,$$在$0<q<p-1$情形下弱解存在的充要条件,其中$σ\ge 0$是任意局部可积函数或测度,$Δ_pu={\rm div}(\nabla u|\nabla u|^{p-2})$是$p$ -Laplacian算子.得到了解的全局点态估计和正则性。因此,我们刻画了方程$$-Δ_p v \, = {b} \, \frac {|\nabla v|^{p}}{v} + σ\quad \text{on} \, \, \, \R^n,$$的可解性,其中${b}>0$。这些结果是新的,即使在经典的情况下$p=2$。我们的方法是基于使用特殊的非线性潜力的沃尔夫型适用于“次线性”问题,和相关的积分不等式。它使我们能够同时处理几个问题的这种类型,如方程一般拟线性运营商$\text{div} \, \mathcal{A}(x, \nabla u)$,分数拉普拉斯$(-Δ)^α$,或完全非线性$k$ -海森运营商。

英文摘要:

We give necessary and sufficient conditions for the existence of weak solutions to the model equation $$-Δ_p u=σ\, u^q \quad \text{on} \, \, \, \R^n,$$ in the case $0<q<p-1$, where $σ\ge 0$ is an arbitrary locally integrable function, or measure, and $Δ_pu={\rm div}(\nabla u|\nabla u|^{p-2})$ is the $p$-Laplacian. Sharp global pointwise estimates and regularity properties of solutions are obtained as well. As a consequence, we characterize the solvability of the equation $$-Δ_p v \, = {b} \, \frac {|\nabla v|^{p}}{v} + σ\quad \text{on} \, \, \, \R^n,$$ where ${b}>0$. These results are new even in the classical case $p=2$. Our approach is based on the use of special nonlinear potentials of Wolff type adapted for "sublinear" problems, and related integral inequalities. It allows us to treat simultaneously several problems of this type, such as equations with general quasilinear operators $\text{div} \, \mathcal{A}(x, \nabla u)$, fractional Laplacians $(-Δ)^α$, or fully nonlinear $k$-Hessian operators.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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