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Author Lotker, Zvi ♦ Patt-Shamir, Boaz ♦ Pettie, Seth
Source ACM Digital Library
Content type Text
Publisher Association for Computing Machinery (ACM)
File Format PDF
Copyright Year ©2015
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword CONGEST model ♦ Network algorithms
Abstract We present distributed network algorithms to compute weighted and unweighted matchings with improved approximation ratios and running times. The computational model is a network of processors exchanging $\textit{O}(log$ $\textit{n})-bit$ messages (the CONGEST model). For unweighted graphs, we give an algorithm providing (1-ε)-approximation in $\textit{O}(log$ $\textit{n})$ time for any constant ε>0, improving on the classical ½-approximation in $\textit{O}log$ $\textit{n})$ time of Israeli and Itai [1986]. The time complexity of the algorithm depends on 1⁃ε exponentially in the general case, and polynomially in bipartite graphs. For weighted graphs, we present another algorithm which provides (½-ε) approximation in general graphs in $O(logε^{-1}log$ $\textit{n})$ time, improving on the previously known algorithms which attain (¼-ε)-approximation in $\textit{O}(log$ $\textit{n})$ time or ½-approximation in $\textit{O}(\textit{n})$ time. All our algorithms are randomized: the complexity bounds hold both with high probability and for the expected running time.
ISSN 00045411
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2015-11-02
Publisher Place New York
e-ISSN 1557735X
Journal Journal of the ACM (JACM)
Volume Number 62
Issue Number 5
Page Count 17
Starting Page 1
Ending Page 17

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Source: ACM Digital Library