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arXiv 1607.07282math.APmath-phmath.MP
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关于奇异扰动泛函极小元的收敛性

On the convergence of minimizers of singular perturbation functionals

Andres Contreras, Xavier Lamy, Rémy Rodiac

摘要:

对狄利克雷能的奇异扰动的研究是软凝聚态唯象描述范式的核心。能够传递到极限在理解基态的几何驱动轮廓中起着至关重要的作用。在这项工作中,我们研究,在非常一般的假设下,收敛极小调和映射。我们证明了收敛是局部一致的边界,远离低维奇异集。我们的结果概括了相关的发现,最显着的液晶理论,所有尺寸$n\geq 3$,一般的非线性。我们的证明遵循一个众所周知的计划,依赖于小能量估计和单调性公式。由于我们不依赖于势的具体形式,因此它与以前在处理边界处的小能量估计方面的研究有很大的不同。特别是,这扩展了现有的结果在三维设置。在更高的维度,我们还处理有关边界单调性公式的额外困难。

英文摘要:

The study of singular perturbations of the Dirichlet energy is at the core of the phenomenological-description paradigm in soft condensed matter. Being able to pass to the limit plays a crucial role in the understanding of the geometric-driven profile of ground states. In this work we study, under very general assumptions, the convergence of minimizers towards harmonic maps. We show that the convergence is locally uniform up to the boundary, away from the lower dimensional singular set. Our results generalize related findings, most notably in the theory of liquid-crystals, to all dimensions $n\geq 3$, and to general nonlinearities. Our proof follows a well-known scheme, relying on small energy estimate and monotonicity formula. It departs substantially from previous studies in the treatment of the small energy estimate at the boundary, since we do not rely on the specific form of the potential. In particular this extends existing results in 3-dimensional settings. In higher dimensions we also deal with additional difficulties concerning the boundary monotonicity formula.

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