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On the best possible competitive ratio for the multislope ski-rental problem

Author

Listed:
  • Hiroshi Fujiwara

    (Shinshu University)

  • Takuma Kitano

    (Denso Create Inc.)

  • Toshihiro Fujito

    (Toyohashi University of Technology)

Abstract

The multislope ski-rental problem is an extension of the classical ski-rental problem, where the player has several lease options besides the pure rent and buy options. In this problem the hardness of an instance, which is the setting of options, significantly affects the player’s performance. There is an algorithm that for a given instance, computes the best possible strategy. However, the output is given as numerical values and therefore the relational nature between an instance and the best possible performance for it has not been known. In this paper we prove that even for the easiest instance, a competitive ratio smaller than $$e/(e - 1) \approx 1.58$$ e / ( e - 1 ) ≈ 1.58 cannot be achieved. More precisely, a tight lower bound on the best possible performance is obtained in a closed form parametrized by the number of options. Furthermore, we establish a matching upper and lower bound on the competitive ratio each for the 3-option and 4-option problems.

Suggested Citation

  • Hiroshi Fujiwara & Takuma Kitano & Toshihiro Fujito, 2016. "On the best possible competitive ratio for the multislope ski-rental problem," Journal of Combinatorial Optimization, Springer, vol. 31(2), pages 463-490, February.
    • Handle: RePEc:spr:jcomop:v:31:y:2016:i:2:d:10.1007_s10878-014-9762-9
    DOI: 10.1007/s10878-014-9762-9
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    Cited by:

    1. Yong Zhang & Jiahao Li & Xingyu Yang & Xiaohui Wang, 2022. "Lease or financial lease? Deterministic strategies for on-line financial lease problem with the second-hand transaction," Journal of Combinatorial Optimization, Springer, vol. 44(2), pages 1248-1264, September.
    2. Xin Feng & Chengbin Chu, 2022. "Online leasing problem with price fluctuations and the second-hand transaction," Journal of Combinatorial Optimization, Springer, vol. 43(5), pages 1280-1297, July.

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