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arXiv 2301.09405math.MGmath.CA
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曲线的凸包:体积与签名

Convex Hulls of Curves: Volumes and Signatures

Carlos Améndola, Darrick Lee, Chiara Meroni

AI总结:

本文研究了利用路径签名计算曲线凸包体积的方法,提出了使体积公式成立的充分条件及循环曲线类,并给出了基于长度和有向面积的几何解释。

摘要:

取曲线的凸包是计算几何中的一种自然构造。另一方面,路径签名在随机分析中处于核心地位,能够捕捉曲线的几何性质,尽管对于大于二阶的签名的精确解释尚不明确。在本文中,我们研究了使用路径签名来计算曲线凸包的体积。我们提出了曲线的充分条件,使得其凸包的体积可以通过此类公式来计算。典型的例子是经典矩曲线,而我们的曲线类(我们称之为循环曲线)包含了其他已知类别,如 $d$ 阶曲线和具有全正挠率的曲线。我们还猜想了一个关于曲线的充分必要条件,使得签名体积公式成立。最后,我们根据长度和有向面积给出了体积公式的具体几何解释。

英文摘要:

Taking the convex hull of a curve is a natural construction in computational geometry. On the other hand, path signatures, central in stochastic analysis, capture geometric properties of curves, although their exact interpretation for levels larger than two is not well understood. In this paper, we study the use of path signatures to compute the volume of the convex hull of a curve. We present sufficient conditions for a curve so that the volume of its convex hull can be computed by such formulae. The canonical example is the classical moment curve, and our class of curves, which we call cyclic, includes other known classes such as $d$-order curves and curves with totally positive torsion. We also conjecture a necessary and sufficient condition on curves for the signature volume formula to hold. Finally, we give a concrete geometric interpretation of the volume formula in terms of lengths and signed areas.

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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