A Centralized Local Algorithm for the Sparse Spanning Graph Problem
A Centralized Local Algorithm for the Sparse Spanning Graph Problem
复制标题
稀疏生成图问题的集中局部算法
DOI:
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发表时间:
2018
期刊:
影响因子:
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通讯作者:
Reut Levi
中科院分区:
文献类型:
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作者:
C. Lenzen;Reut Levi
Constructing a sparse spanning subgraph is a fundamental primitive in graph theory. In this paper, we study this problem in the Centralized Local model, where the goal is to decide whether an edge is part of the spanning subgraph by examining only a small part of the input; yet, answers must be globally consistent and independent of prior queries.
Unfortunately, maximally sparse spanning subgraphs, i.e., spanning trees, cannot be constructed efficiently in this model. Therefore, we settle for a spanning subgraph containing at most (1+epsilon)n edges (where n is the number of vertices and epsilon is a given approximation/sparsity parameter). We achieve a query complexity of O~(poly(Delta/epsilon)n^{2/3}), where Delta is the maximum degree of the input graph. Our algorithm is the first to do so on arbitrary bounded degree graphs. Moreover, we achieve the additional property that our algorithm outputs a spanning subgraph of bounded stretch i.e., distances are approximately preserved. With high probability, for each deleted edge there is a path of O(log n * (Delta+log n)/epsilon) hops in the output that connects its endpoints.
影响因子:
1
作者:
Levi, Reut;Moshkovitz, Guy;Ron, Dana;Rubinfeld, Ronitt;Shapira, Asaf
通讯作者:
Shapira, Asaf
影响因子:
1.1
作者:
Levi, Reut;Ron, Dana;Rubinfeld, Ronitt
通讯作者:
Rubinfeld, Ronitt