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arXiv 2203.13245math.AP
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具有幂增长梯度项的nonlinear elliptic不等式的Hölder正则性和Liouville性质

Hölder regularity and Liouville properties for nonlinear elliptic inequalities with power-growth gradient terms

Alessandro Goffi

摘要:

本文研究了一类具有散度型扩散和一阶幂型项的偏微分不等式分布解的局部积分梯度界.这些估计的应用是双重的。首先,我们证明了这类扩散偏微分方程的分布半解的(尖锐的)整体Hölder正则性,其中一阶项具有超自然增长,右手边在一个合适的Morrey类上,提出了一个有界和正则开集$Ω$。其次,我们提供了具有超线性一阶项的不等式的完整Liouville性质的新证明,而无需假设相应齐次偏微分不等式的解有任何单边界。我们还讨论了以前的性质的一些扩展,所产生的问题,在次黎曼几何和偏微分不等式提出的非紧完备黎曼流形适当的面积增长条件下的测地球,提供新的结果在这两个方向。该方法依赖于积分参数,不利用最大值和比较原则。

英文摘要:

This note studies local integral gradient bounds for distributional solutions of a large class of partial differential inequalities with diffusion in divergence form and power-like first-order terms. The applications of these estimates are two-fold. First, we show the (sharp) global Hölder regularity of distributional semi-solutions to this class of diffusive PDEs with first-order terms having supernatural growth and right-hand side in a suitable Morrey class posed on a bounded and regular open set $Ω$. Second, we provide a new proof of entire Liouville properties for inequalities with superlinear first-order terms without assuming any one-side bound on the solution for the corresponding homogeneous partial differential inequalities. We also discuss some extensions of the previous properties to problems arising in sub-Riemannian geometry and also to partial differential inequalities posed on noncompact complete Riemannian manifolds under appropriate area-growth conditions of the geodesic spheres, providing new results in both these directions. The methods rely on integral arguments and do not exploit maximum and comparison principles.

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