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arXiv 2410.23908math.AP
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关于自由不连续问题非局部逼近的De Giorgi猜想:对称梯度情形

On De Giorgi's Conjecture of Nonlocal approximations for free-discontinuity problems: The symmetric gradient case

Stefano Almi, Elisa Davoli, Anna Kubin, Emanuele Tasso

AI总结:

本研究将De Giorgi关于自由不连续问题非局部逼近的猜想推广至对称梯度泛函情形,通过推广Fréchet-Kolmogorov方法证明能量等有界形变的紧性与Gamma收敛,借助GSBD空间新刻画确定极限空间,建立极限表示。

摘要:

我们证明了E. De Giorgi关于自由不连续问题非局部逼近的猜想可推广至由容许场的对称梯度定义的泛函情形。在引入一类合适的连续有限差分逼近子后,我们证明了能量等有界的形变的紧性,以及它们的Gamma收敛性。紧性分析是一个关键难点,我们通过推广两位作者此前提出的Fréchet-Kolmogorov方法攻克了这一难题。第二个核心困难是确定容许形变的极限空间,因为方向变分的控制先验地仅在平均意义下成立。最终通过对GSBD空间的全新刻画,建立了该空间下的极限表示。

英文摘要:

We prove that E. De Giorgi's conjecture for the nonlocal approximation of free-discontinuity problems extends to the case of functionals defined in terms of the symmetric gradient of the admissible field. After introducing a suitable class of continuous finite-difference approximants, we show the compactness of deformations with equibounded energies, as well as their Gamma-convergence. The compactness analysis is a crucial hurdle, which we overcome by generalizing a Fréchet-Kolmogorov approach previously introduced by two of the authors. A second essential difficulty is the identification of the limiting space of admissible deformations, since a control on the directional variations is, a priori, only available in average. A limiting representation in GSBD is eventually established via a novel characterization of this space.

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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