Journal of the Operations Research Society of China ›› 2025, Vol. 13 ›› Issue (1): 142-160.doi: 10.1007/s40305-023-00469-1

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  • 收稿日期:2022-06-03 修回日期:2022-12-15 出版日期:2025-03-30 发布日期:2025-03-20
  • 通讯作者: Wen-Guo Yang,Sheng-Min-Jie Chen,Dong-Lei Du,Sui-Xiang Gao E-mail:yangwg@ucas.edu.cn;chenshengminjie19@mails.ucas.ac.cn;ddu@unb.ca;sxgao@ucas.edu.cn
  • 基金资助:
    Sheng-Min-Jie Chen’s research is partially supported by the China Scholarship Council (No.202004910755). Wen-Guo Yang’s research is partially supported by the National Natural Science Foundation of China (Nos. 12071459 and 11991022) and the Fundamental Research Funds for Central Universities (No. E1E40107X2). Dong-Lei Du’s research is partially supported by the Natural Sciences and Engineering Research Council of Canada (No.283106) and the National Natural Science Foundation of China (Nos. 11771386 and 11728104).

Maximizing the Ratio of Monotone DR-Submodular Functions on Integer Lattice

Sheng-Min-Jie Chen1, Dong-Lei Du2, Wen-Guo Yang1, Sui-Xiang Gao1   

  1. 1 School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    2 Faculty of Management, University of New Brunswick, Fredericton, NB, Canada
  • Received:2022-06-03 Revised:2022-12-15 Online:2025-03-30 Published:2025-03-20
  • Contact: Wen-Guo Yang,Sheng-Min-Jie Chen,Dong-Lei Du,Sui-Xiang Gao E-mail:yangwg@ucas.edu.cn;chenshengminjie19@mails.ucas.ac.cn;ddu@unb.ca;sxgao@ucas.edu.cn

Abstract: In this work, we focus on maximizing the ratio of two monotone DR-submodular functions on the integer lattice. It is neither submodular nor supermodular. We prove that the Threshold Decrease Algorithm is a 1—e-(1-kg)ε approximation ratio algorithm. Additionally, we construct the relationship between maximizing the ratio of two monotone DR-submodular functions and maximizing the difference of two monotone DR-submodular functions on the integer lattice. Based on this relationship, we combine the dichotomy technique and Threshold Decrease Algorithm to solve maximizing the difference of two monotone DR-submodular functions on the integer lattice and prove its approximation ratio is f(x)-g(x) 1—e-(1-kg) f (x*)—g(x*)—ε. To the best of our knowledge, before us, there was no work to focus on maximizing the ratio of two monotone DR-submodular functions on integer lattice by using the Threshold Decrease Algorithm.

Key words: DR-submodular maximization, Integer lattice, Threshold decrease algorithm

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