A Spanner for the Day After

A Spanner for the Day After
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后天的扳手

DOI:
10.1007/s00454-020-00228-6
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发表时间:
2020
影响因子:
0.8
通讯作者:
Oláh, Dániel
Oláh, Dániel
中科院分区:
数学3区
文献类型:
--
作者:
Buchin, Kevin;Har-Peled, Sariel;Oláh, Dániel

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我们将展示如何在一组断点上构造一个扳手,该扳手对节点的灾难性故障具有弹性。具体来说,对于规定的参数,计算出的扳手有$$\begin{aligned} {{\mathcal {O}}}\bigl (\varepsilon ^{-O(d)} {\vartheta }^{-6} n(\log \log n)^6 \log n \bigr ) \end{aligned}$$条边。此外,对于任意点和任意删除的集合点,残差图对除它们之外的所有点都是有效的。除了琐碎的团块边缘之外,以前的构造都没有这种弹性特性(即,只有一小部分额外的顶点失去了保持距离的连通性)。我们的构造首先在一个维度上解决了确切的问题,然后在更高的维度上展示了一个令人惊讶的简单而优雅的构造,它以黑盒的方式使用了一维构造。
We show how to construct a-spanner over a setofnpoints inthat is resilient to a catastrophic failure of nodes. Specifically, for prescribed parameters, the computed spannerhas $$\begin{aligned} {{\mathcal {O}}}\bigl (\varepsilon ^{-O(d)} {\vartheta }^{-6} n(\log \log n)^6 \log n \bigr ) \end{aligned}$$edges. Furthermore, foranyk, andanydeleted setofkpoints, the residual graphis a-spanner for all the points ofexcept forof them. No previous constructions, beyond the trivial clique withedges, were known with this resilience property (i.e., only a tiny additional fraction of vertices,, lose their distance preserving connectivity). Our construction works by first solving the exact problem in one dimension, and then showing a surprisingly simple and elegant construction in higher dimensions, that uses the one-dimensional construction in a black-box fashion.
DOI: --
发表时间: 2005
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影响因子: --
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