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Poster

A Dynamic Algorithm for Weighted Submodular Cover Problem

Kiarash Banihashem · Samira Goudarzi · MohammadTaghi Hajiaghayi · Peyman Jabbarzade · Morteza Monemizadeh

Hall C 4-9 #1003
[ ] [ Paper PDF ]
[ Slides
Thu 25 Jul 2:30 a.m. PDT — 4 a.m. PDT
 
Oral presentation: Oral 5C Heuristics and Algorithms
Thu 25 Jul 1:30 a.m. PDT — 2:30 a.m. PDT

Abstract: We initiate the study of the submodular cover problem in a dynamic setting where the elements of the ground set are inserted and deleted. In the classical submodular cover problem, we are given a monotone submodular function $f : 2^{V} \to \mathbb{R}^{\ge 0}$ and the goal is to obtain a set $S \subseteq V$ that minimizes the cost subject to the constraint $f(S) = f(V)$. This is a classical problem in computer science and generalizes the Set Cover problem, 2-Set Cover, and dominating set problem among others. We consider this problem in a dynamic setting where there are updates to our set $V$, in the form of insertions and deletions of elements from a ground set $\mathcal{V}$, and the goal is to maintain an approximately optimal solution with low query complexity per update. For this problem, we propose a randomized algorithm that, in expectation, obtains a $(1-O(\epsilon), O(\epsilon^{-1}))$-bicriteria approximation using polylogarithmic query complexity per update.

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