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On the regularity of very weak solutions for linear elliptic equations in divergence form
Nonlinear Differential Equations and Applications (NoDEA) ( IF 1.1 ) Pub Date : 2020-07-24 , DOI: 10.1007/s00030-020-00646-8
Domenico Angelo La Manna , Chiara Leone , Roberta Schiattarella

In this paper we consider a linear elliptic equation in divergence form

$$\begin{aligned} \sum _{i,j}D_j(a_{ij}(x)D_i u )=0 \quad \hbox {in } \Omega . \end{aligned}$$(0.1)

Assuming the coefficients \(a_{ij}\) in \(W^{1,n}(\Omega )\) with a modulus of continuity satisfying a certain Dini-type continuity condition, we prove that any very weak solution \(u\in L^{n'}_\mathrm{loc}(\Omega )\) of (0.1) is actually a weak solution in \(W^{1,2}_\mathrm{loc}(\Omega )\).



中文翻译:

关于散度形式的线性椭圆型方程的极弱解的正则性

在本文中,我们考虑发散形式的线性椭圆方程

$$ \ begin {aligned} \ sum _ {i,j} D_j(a_ {ij}(x)D_i u)= 0 \ quad \ hbox {in} \ Omega。\ end {aligned} $$(0.1)

假设系数\(A_ {IJ} \)\(W ^ {1,N}(\欧米茄)\)与满足一定迪尼型连续性状态连续性的模量,我们证明了任何非常弱溶液\( u \ in(0.1)的L ^ {n'} _ \ mathrm {loc}(\ Omega)\)实际上是\(W ^ {1,2} _ \ mathrm {loc}(\ Omega)的弱解\)

更新日期:2020-07-25
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