Greedy spanners are optimal in doubling metrics
Greedy spanners are optimal in doubling metrics
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贪婪扳手在加倍指标方面是最佳的
DOI:
10.1137/1.9781611975482.145
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发表时间:
2017
期刊:
影响因子:
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通讯作者:
Christian Wulff
中科院分区:
文献类型:
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作者:
G. Borradaile;Hung Le;Christian Wulff
We show that the greedy spanner algorithm constructs a $(1+\epsilon)$-spanner of weight $\epsilon^{-O(d)}w(\mathrm{MST})$ for a point set in metrics of doubling dimension $d$, resolving an open problem posed by Gottlieb. Our result generalizes the result by Narasimhan and Smid who showed that a point set in $d$-dimension Euclidean space has a $(1+\epsilon)$-spanner of weight at most $\epsilon^{-O(d)}w(\mathrm{MST})$. Our proof only uses the packing property of doubling metrics and thus implies a much simpler proof for the same result in Euclidean space.