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arXiv · 2208.02526

Nearly Optimal Communication and Query Complexity of Bipartite Matching

Joakim Blikstad·Jan van den Brand·Yuval Efron·Sagnik Mukhopadhyay·Danupon Nanongkai
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Abstract

We settle the complexities of the maximum-cardinality bipartite matching problem (BMM) up to poly-logarithmic factors in five models of computation: the two-party communication, AND query, OR query, XOR query, and quantum edge query models. Our results answer open problems that have been raised repeatedly since at least three decades ago [Hajnal, Maass, and Turan STOC'88; Ivanyos, Klauck, Lee, Santha, and de Wolf FSTTCS'12; Dobzinski, Nisan, and Oren STOC'14; Nisan SODA'21] and tighten the lower bounds shown by Beniamini and Nisan [STOC'21] and Zhang [ICALP'04]. We also settle the communication complexity of the generalizations of BMM, such as maximum-cost bipartite $b$-matching and transshipment; and the query complexity of unique bipartite perfect matching (answering an open question by Beniamini [2022]). Our algorithms and lower bounds follow from simple applications of known techniques such as cutting planes methods and set disjointness.

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Joakim Blikstad, Jan van den Brand, Yuval Efron, Sagnik Mukhopadhyay, Danupon Nanongkai. 2022-08-04. Nearly Optimal Communication and Query Complexity of Bipartite Matching. https://arxiv.org/abs/2208.02526

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