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arXiv 2408.07993math.AP
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非散度型一般半线性椭圆方程解的内点逐点$C^1$与$C^{1,1}$正则性

Interior pointwise $C^{1}$ and $C^{1,1}$ regularity of solutions for general semilinear elliptic equation in nondivergence form

Jingqi Liang

AI总结:

该研究在更弱假设下推导非散度型一般半线性椭圆方程$L^n$-粘性解的内点逐点$C^1$与$C^{1,1}$正则性,推广了非齐次项相关结果,给出无界系数下的正则性判定条件。

摘要:

本文在更弱的假设下,得到了非散度型一般半线性椭圆方程的$L^n$-粘性解的$C^1$与$C^{1,1}$正则性,将非齐次项为$f(x)$的方程的相关结果推广到了非齐次项为$f(x,u)$的情形。具体而言,非齐次项$f(x,u)$被最优地假设为关于$u$满足一致Dini连续性条件,关于$x$满足修正的$C^{1,1}$牛顿位势条件。针对无界系数,若$a_{ij}$在$x_0\in\Omega$处为$C_n^{-1,1}$且模很小,$b_i\in L^q(\Omega)$(其中$q>n$),则解在$x_0$处是$C^1$的。进一步地,若$a_{ij}$、$b_i$在$x_0$处Dini连续,则解在$x_0$处是$C^{1,1}$的。

英文摘要:

In this paper, we obtain $C^{1}$ and $C^{1,1}$ regularity of $L^{n}$-viscosity solutions for general semilinear elliptic equation in nondivergence form under some more weaker assumptions, which generalize the result for equations with nonhomogeneous term $f(x)$ to $f(x,u)$. In particular, the nonhomogeneous term $f(x,u)$ is assumed optimally to satisfy unform Dini continuity condition in $u$ and modified $C^{1,1}$ Newtonian potential condition in $x$. For unbounded coefficients, if $a_{ij}$ is $C_{n}^{-1,1}$ at $x_{0}\inΩ$ with small modulus, $b_{i}\in L^{q}(Ω)$ for some $q>n$, the solution is $C^{1}$ at $x_{0}$. Furthermore, if $a_{ij},~b_{i}$ are Dini continuous at $x_{0}$, the solution is $C^{1,1}$ at $x_{0}$.

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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