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Non-monotone Submodular Maximization in Exponentially Fewer Iterations
Eric Balkanski · Adam Breuer · Yaron Singer

Wed Dec 05 07:45 AM -- 09:45 AM (PST) @ Room 210 #12

In this paper we consider parallelization for applications whose objective can be expressed as maximizing a non-monotone submodular function under a cardinality constraint. Our main result is an algorithm whose approximation is arbitrarily close to 1/2e in O(log^2 n) adaptive rounds, where n is the size of the ground set. This is an exponential speedup in parallel running time over any previously studied algorithm for constrained non-monotone submodular maximization. Beyond its provable guarantees, the algorithm performs well in practice. Specifically, experiments on traffic monitoring and personalized data summarization applications show that the algorithm finds solutions whose values are competitive with state-of-the-art algorithms while running in exponentially fewer parallel iterations.

Author Information

Eric Balkanski (Harvard University)
Adam Breuer (Harvard University)
Yaron Singer (Harvard University)

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