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L_p regularity theorem for elliptic equations in less smooth domains

机译:L_P规律性定理在不太平滑的域中的椭圆方程

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摘要

We consider a 2mth-order strongly elliptic operator A subject to Dirichlet boundary conditions in a domain Ω of R~n, and show the L_p regularity theorem, assuming that the domain has less smooth boundary. We derive the regularity theorem from the following isomorphism theorems in Sobolev spaces. Let A; be a nonnegative integer. When A is a divergence form elliptic operator, A - A has a bounded inverse from the Sobolev space w~k_p~m(Ω) into W~(k+m)_p(Ω) for λ belonging to a suitable sectorial region of the complex plane, if Ω is a uniformly C~(k,1) domain. When A is a non-divergence form elliptic operator, A - λ has a bounded inverse from W~k_p(Ω) into W~(k+2m)_p(Ω), if Ω is a uniformly C~(k+m,1) domain. Compared with the known results, we weaken the smoothness assumption on the boundary of Ω by m-1.
机译:我们考虑一个2mlound强烈的椭圆形算子A对R〜N的域ωωω的Dirichlet边界条件进行,并显示L_P规律性定理,假设域具有较小的边界。我们从SoboLev Spaces中的以下同义定理中得出了规律性定理。让一个;是一个非负整数。当A是发散形式椭圆算子时,a - a从SOBOLEV空间W〜k_p〜m(ω)的有界反比于属于合适的扇区区域的λ的w〜(k + m)_p(ω)。复杂平面,如果ω是均匀的C〜(k,1)域。当A是非分歧形式椭圆形算子时,A-λ具有从W〜K_P(ω)的界逆,进入W〜(k + 2m)_p(ω),如果ω是均匀的c〜(k + m, 1)域名。与已知结果相比,我们通过M-1削弱了ω的边界上的平滑假设。

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