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Efficient Online Linear Optimization with Approximation Algorithms

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  • Dan Garber

    (Faculty of Industrial Engineering and Management, Technion–Israel Institute of Technology, Haifa 3200003, Israel)

Abstract

We revisit the problem of online linear optimization in the case where the set of feasible actions is accessible through an approximated linear optimization oracle with a factor α multiplicative approximation guarantee. This setting in particular is interesting because it captures natural online extensions of well-studied offline linear optimization problems that are NP-hard yet admit efficient approximation algorithms. The goal here is to minimize the α -regret , which is the natural extension to this setting of the standard regret in online learning . We present new algorithms with significantly improved oracle complexity for both the full-information and bandit variants of the problem. Mainly, for both variants, we present α-regret bounds of O ( T − 1 / 3 ) , were T is the number of prediction rounds, using only O ( l o g T ) calls to the approximation oracle per iteration, on average. These are the first results to obtain both the average oracle complexity of O ( l o g T ) (or even polylogarithmic in T ) and α -regret bound O ( T − c ) for a constant c > 0 for both variants.

Suggested Citation

  • Dan Garber, 2021. "Efficient Online Linear Optimization with Approximation Algorithms," Mathematics of Operations Research, INFORMS, vol. 46(1), pages 204-220, February.
    • Handle: RePEc:inm:ormoor:v:46:y:2021:i:1:p:204-220
    DOI: 10.1287/moor.2020.1053
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    References listed on IDEAS

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    1. V. Chvatal, 1979. "A Greedy Heuristic for the Set-Covering Problem," Mathematics of Operations Research, INFORMS, vol. 4(3), pages 233-235, August.
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    Cited by:

    1. Rad Niazadeh & Negin Golrezaei & Joshua Wang & Fransisca Susan & Ashwinkumar Badanidiyuru, 2023. "Online Learning via Offline Greedy Algorithms: Applications in Market Design and Optimization," Management Science, INFORMS, vol. 69(7), pages 3797-3817, July.

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