凸多面体上闭曲线的圆锥存在性
Conical Existence of Closed Curves on Convex Polyhedra
摘要：
设C是一个简单的，封闭的，有向曲线的表面上的凸多面体P.我们确定几个类的曲线C“生活在一个锥”，在这个意义上说，C和一个邻居的一边可能是等距嵌入表面上的一个锥λ，与顶点A的λ封闭内（图像）C;我们还证明，每个点C是“可见的”。特别是，我们得到，这些曲线在平面上有非自相交的发展。此外，我们确定的曲线，生活在圆锥体的两侧支持一种新的类型的“源展开”的整个表面的P到一个非重叠的一块，在配套文件中报告。
英文摘要：
Let C be a simple, closed, directed curve on the surface of a convex polyhedron P. We identify several classes of curves C that "live on a cone," in the sense that C and a neighborhood to one side may be isometrically embedded on the surface of a cone Lambda, with the apex a of Lambda enclosed inside (the image of) C; we also prove that each point of C is "visible to" a. In particular, we obtain that these curves have non-self-intersecting developments in the plane. Moreover, the curves we identify that live on cones to both sides support a new type of "source unfolding" of the entire surface of P to one non-overlapping piece, as reported in a companion paper.
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