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On the Set-Covering Problem: II. An Algorithm for Set Partitioning

Author

Listed:
  • Egon Balas

    (Carnegie-Mellon University, Pittsburgh, Pennsylvania)

  • Manfred Padberg

    (International Institute of Management, Berlin, West Germany)

Abstract

In an earlier paper [ Opns. Res. 20 1153–1161 (1972)] we proved that any feasible integer solution to the linear program associated with the equality-constrained set-covering problem can be obtained from any other feasible integer solution by a sequence of less than m pivots (where m is the number of equations), such that each solution generated in the sequence is integer. However, degeneracy makes it difficult to find a sequence of pivots leading to an integer optimum. In this paper we give a constructive characterization of adjacency relations between integer vertices of the feasible set that enables us to generate edges (all, if necessary) connecting a given integer vertex to adjacent integer vertices. This helps overcome the difficulties caused by degeneracy and leads to a class of algorithms, of which we discuss two.

Suggested Citation

  • Egon Balas & Manfred Padberg, 1975. "On the Set-Covering Problem: II. An Algorithm for Set Partitioning," Operations Research, INFORMS, vol. 23(1), pages 74-90, February.
    • Handle: RePEc:inm:oropre:v:23:y:1975:i:1:p:74-90
    DOI: 10.1287/opre.23.1.74
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    Cited by:

    1. Adil Tahir & Guy Desaulniers & Issmail El Hallaoui, 2022. "Integral Column Generation for Set Partitioning Problems with Side Constraints," INFORMS Journal on Computing, INFORMS, vol. 34(4), pages 2313-2331, July.
    2. Rosat, Samuel & Quesnel, Frédéric & Elhallaoui, Issmail & Soumis, François, 2017. "Dynamic penalization of fractional directions in the integral simplex using decomposition: Application to aircrew scheduling," European Journal of Operational Research, Elsevier, vol. 263(3), pages 1007-1018.
    3. Andrei V. Nikolaev & Egor V. Klimov, 2024. "Finding a second Hamiltonian decomposition of a 4-regular multigraph by integer linear programming," Journal of Combinatorial Optimization, Springer, vol. 47(5), pages 1-31, July.
    4. Omar Foutlane & Issmail Hallaoui & Pierre Hansen, 2022. "Distributed Integral Column Generation for Set Partitioning Problems," SN Operations Research Forum, Springer, vol. 3(2), pages 1-22, June.
    5. Adil Tahir & Guy Desaulniers & Issmail El Hallaoui, 2019. "Integral column generation for the set partitioning problem," EURO Journal on Transportation and Logistics, Springer;EURO - The Association of European Operational Research Societies, vol. 8(5), pages 713-744, December.
    6. Rönnberg, Elina & Larsson, Torbjörn, 2009. "Column generation in the integral simplex method," European Journal of Operational Research, Elsevier, vol. 192(1), pages 333-342, January.
    7. Sujeevraja Sanjeevi & Saravanan Venkatachalam, 2021. "Robust flight schedules with stochastic programming," Annals of Operations Research, Springer, vol. 305(1), pages 403-421, October.
    8. Abdelouahab Zaghrouti & François Soumis & Issmail El Hallaoui, 2014. "Integral Simplex Using Decomposition for the Set Partitioning Problem," Operations Research, INFORMS, vol. 62(2), pages 435-449, April.
    9. Abdelouahab Zaghrouti & Issmail El Hallaoui & François Soumis, 2018. "Improved integral simplex using decomposition for the set partitioning problem," EURO Journal on Computational Optimization, Springer;EURO - The Association of European Operational Research Societies, vol. 6(2), pages 185-206, June.
    10. Sarin, Subhash C. & Aggarwal, Sanjay, 2001. "Modeling and algorithmic development of a staff scheduling problem," European Journal of Operational Research, Elsevier, vol. 128(3), pages 558-569, February.
    11. Abdelouahab Zaghrouti & Issmail El Hallaoui & François Soumis, 2020. "Improving set partitioning problem solutions by zooming around an improving direction," Annals of Operations Research, Springer, vol. 284(2), pages 645-671, January.

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