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arXiv 1506.04282math.AP
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非局部极小曲面的边界表现

Boundary behavior of nonlocal minimal surfaces

Serena Dipierro, Ovidiu Savin, Enrico Valdinoci

摘要:

我们考虑了非局部极小曲面在边界附近的性质。通过一系列具体的例子,我们证明了非局部极小曲面可以粘在区域的边界上,即使区域是光滑的和凸的。这是一个纯粹的非局部现象,它与经典的极小曲面的边界性质形成了鲜明的对比。特别是,我们表现出粘性现象,半球时,球外的数据是一个小的半环和一个二维盒子的一侧时,左右两侧的数据之间的振荡是足够大的。当分数参数较小时,卡钻效应会越来越明显。此外,我们表明,在平面中的线是不稳定的边界:即,小compensable支持扰动的线导致的最小化板坚持在边界上,由一个数量是成比例的权力的扰动。在所有的例子中,我们提出了具体的估计粘性现象。此外,我们还构造了一个家庭的companies支持的障碍,可以有独立的利益。

英文摘要:

We consider the behavior of the nonlocal minimal surfaces in the vicinity of the boundary. By a series of detailed examples, we show that nonlocal minimal surfaces may stick at the boundary of the domain, even when the domain is smooth and convex. This is a purely nonlocal phenomenon, and it is in sharp contrast with the boundary properties of the classical minimal surfaces. In particular, we show stickiness phenomena to half-balls when the datum outside the ball is a small half-ring and to the side of a two-dimensional box when the oscillation between the datum on the right and on the left is large enough. When the fractional parameter is small, the sticking effects may become more and more evident. Moreover, we show that lines in the plane are unstable at the boundary: namely, small compactly supported perturbations of lines cause the minimizers in a slab to stick at the boundary, by a quantity that is proportional to a power of the perturbation. In all the examples, we present concrete estimates on the stickiness phenomena. Also, we construct a family of compactly supported barriers which can have independent interest.

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