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arXiv 1804.09035math.AT
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零维和一维扩展函数持久性的稳定性

Stability of Extended Functional Persistence in Dimensions Zero and One

Elchanan Solomon

摘要:

如上所述,稳定性结果不正确。特别地,一个具有连续实值函数f的精细三角化单纯复形X的一维扩展持久性图和它的单骨架图G(也具有f)不需要是封闭的。举一个例子,设X是一个半径为r的精细三角形圆盘,f是到边界的距离函数,它从X的边界圆径向增加,在中心处最大。(X,f)的扩展持久性图包含形式为(0,r)的一维持久性中的一个点,而其单骨架的一维扩展持久性图仅在对角线附近具有点。

英文摘要:

The stability result, as stated, is incorrect. In particular, the 1-dimensional extended persistence diagrams of a finely-triangulated simplicial complex X equipped with a continuous real-valued function f, and its one-skeleton graph G (also equipped with f), need not be close. To take an example, let X be a finely-triangulated disc of radius r and let f be the distance-to -the-boundary function, which increases radially from the boundary circle of X and is maximized at the center. The extended persistence diagram of (X,f) contains a point in 1-dimensional persistence of the form (0,r), whereas the 1-dimensional extended persistence diagram of its one-skeleton only has points near the diagonal.

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