Higher integrabilities and boundednesses for minimizers of weighted anisotropic integral functionals

Higher integrabilities and boundednesses for minimizers of weighted anisotropic integral functionals
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加权各向异性积分泛函的极小值具有更高的可积性和有界性

DOI:
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发表时间:
2019-04
影响因子:
0.4
通讯作者:
Yan Dong
Yan Dong
中科院分区:
数学4区
文献类型:
--
作者:
Tingfu Feng;Yan Dong

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我们考虑加权各向异性积分泛函$$i(U)=\int_{\Omega}f(x,Du(X))dx,$$n其中$\Omega子集R^n$是有界开集,$u:\omega\子集R^n\right tarrow R$,$f:\omega\乘R^n\right tarrow[0,+\inty]$是Carath\‘{e}气味函数,满足$$\sum_{i=1}^{n}v_{i}{|z_{i}|^{p_{i}|}{p_{i}\lefZ)\leq c\left(1+\sum_{i=1}^{n}v_{i}{|z_{i}|}^{q_{i}}\right),$$\\其中$c>0$是一个常量,$1;p_i<q_i<N$,$i=1,2,cdots,n$,${nu_i}$是L_{loc}^1(\Omega)中$\Omega$和${\nu_i}上的正权函数,{\kern 1pt}{\Left({\frac{1}{{\nu_i}\Right)^{{mi_i}\在{L^1}(\Omega)中,利用加权各向异性Soblev不等式和迭代引理,证明了当边界基准具有较高的可积性时,$i(U)$的极小元$u$具有较高的可积性。我们还得到了极小子的指数形式的全局有界性和$L^\inty(\Omega)$的全局有界性。此外,还给出了障碍问题的极小值问题与$i(U)$类似的结果。
We consider the weighted anisotropic integral functional $$I(u)=\int_{\Omega}f(x,Du(x))dx,$$ where $\Omega\subset R^n$ is a bounded open set, $u:\Omega\subset R^n \rightarrow R $, $f:\Omega \times R^n \rightarrow [0,+\infty) $ is a Carath\'{e}odory function  satisfying$$ \sum_{i=1}^{n}v_{i}{|z_{i}|}^{p_{i}}\leq f(x,z)\leq c\left(1+\sum_{i=1}^{n}v_{i}{|z_{i}|}^{q_{i}}\right),$$\\in which $c>0 $ is a constant, $1<p_i<q_i<n$, $i=1,2,\cdots,n$, ${\nu_i}$ is the positive weighted function on $\Omega$ and\\$${\nu _i} \in L_{loc}^1(\Omega ),{\kern 1pt} {\kern 1pt} {\kern 1pt} {\kern 1pt} {\kern 1pt} {\left( {\frac{1}{{{\nu _i}}}} \right)^{{m_i}}} \in {L^1}(\Omega ),{m_i} \ge \frac{1}{{{p_i} - 1}}.$$\\By using the weighted anisotropic Sobolev inequality and the iteration Lemma, it is proven the higher integrability for the minimizer $u$ of $I(u)$ when the boundary datum has the higher integrability. We also obtain the global boundednesses of exponential form and $L^\infty(\Omega)$ for the minimizer, respectively. Furthermore, the similar results for the minimizer of the obstacle problem to  $I(u)$ are given.
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