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The one-sided bounded slope condition in evolution problems
Annali di Matematica Pura ed Applicata ( IF 1 ) Pub Date : 2019-08-01 , DOI: 10.1007/s10231-019-00892-3
Verena Bögelein , Thomas Stanin

We establish a local Lipschitz regularity result of solutions to the Cauchy–Dirichlet problem associated with evolutionary partial differential equations

$$\begin{aligned} \left\{ \begin{array}{ll} \partial _t u - {{\,\mathrm{div}\,}}Df(\nabla u) = 0, &{} \quad \text{ in } \, \Omega _T,\\ u=u_0, &{} \quad \text{ on } \, \partial _{{\mathcal {P}}}\, \Omega _T. \end{array} \right. \end{aligned}$$

We do not impose any growth assumptions from above on the function \(f :{\mathbb {R}}^n \rightarrow {\mathbb {R}}\) and only require it to be convex and coercive. The domain \(\Omega \) is required to be bounded and convex, and the time-independent boundary datum \(u_0\) is supposed to be convex and Lipschitz continuous on \({\overline{\Omega }}\). It can be seen as an evolutionary analogue to the one-sided bounded slope condition. Additionally, assuming \(\Omega \) to be uniformly convex, we establish global continuity on \(\overline{\Omega _T}\) of the solution.



中文翻译:

演化问题中的单边有界边坡条件

我们建立了与演化偏微分方程有关的柯西-狄利克雷问题解的局部Lipschitz正则性结果

$$ \ begin {aligned} \ left \ {\ begin {array} {ll} \ partial _t u-{{\,\ mathrm {div} \,}} Df(\ nabla u)= 0,&{} \ quad \ text {in} \,\ Omega _T,\\ u = u_0,&{} \ quad \ text {on} \,\ partial _ {{\ mathcal {P}}} \\,\ Omega _T。\ end {array} \ right。\ end {aligned} $$

我们没有在函数\(f:{\ mathbb {R}} ^ n \ rightarrow {\ mathbb {R}} \)上强加任何增长假设,仅要求它是凸的和强制的。要求域\(\ Omega \)是有界的和凸的,并且与时间无关的边界数据\(u_0 \)应该是凸的,并且Lipschitz在\({\ overline {\ Omega}} \\)上是连续的。可以将其视为单边有界边坡条件的进化模拟。另外,假设\(\ Omega \)是一致凸的,我们在解的\(\ overline {\ Omega _T} \)上建立全局连续性。

更新日期:2020-04-23
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