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Poster
Robust Submodular Maximization: A Non-Uniform Partitioning Approach
Ilija Bogunovic · Slobodan Mitrovic · Jonathan Scarlett · Volkan Cevher
We study the problem of maximizing a monotone submodular function subject to a cardinality constraint $k$, with the added twist that a number of items $\tau$ from the returned set may be removed. We focus on the worst-case setting considered in \cite{orlin2016robust}, in which a constant-factor approximation guarantee was given for $\tau = o(\sqrt{k})$. In this paper, we solve a key open problem raised therein, presenting a new Partitioned Robust (PRo) submodular maximization algorithm that achieves the same guarantee for more general $\tau = o(k)$. Our algorithm constructs partitions consisting of buckets with exponentially increasing sizes, and applies standard submodular optimization subroutines on the buckets in order to construct the robust solution. We numerically demonstrate the performance of PRo in data summarization and influence maximization, demonstrating gains over both the greedy algorithm and the algorithm of \cite{orlin2016robust}.
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Author Information
Ilija Bogunovic (EPFL)
Slobodan Mitrovic (EPFL)
Jonathan Scarlett (EPFL)
Volkan Cevher (EPFL)
Related Events (a corresponding poster, oral, or spotlight)
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2017 Talk: Robust Submodular Maximization: A Non-Uniform Partitioning Approach »
Wed. Aug 9th 04:06 -- 04:24 AM Room Parkside 2
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