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Professor Adam Letchford

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  1. 2024
  2. E-pub ahead of print

    On upper bounds for the multiple knapsack assignment problem

    Galli, L. & Letchford, A., 13/03/2024, (E-pub ahead of print) In: Operations Research Letters. 54, 6 p., 107104.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  3. Published

    CP-Lib: Benchmark instances of the clique partitioning problem

    Sorensen, M. & Letchford, A., 1/03/2024, In: Mathematical Programming Computation. 16, 1, p. 93-111 19 p., 1.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  4. Published

    Operational research: methods and applications

    Petropoulos, F., Laporte, G., Archetti, C., Ayhan, H., Battarra, M., Bennell, J. A., Boylan, J. E., Breton, M., Canca, D., Charlin, L., Chen, B., Cicek, C. T., Jr, L. A. C., Currie, C. S. M., Demeulemeester, E., Ding, L., Disney, S. M., Ehrgott, M., Eppler, M. J., Erdoğan, G., & 59 othersFortz, B., Franco, L. A., Frische, J., Greco, S., Gregory, A. J., Hämäläinen, R. P., Herroelen, W., Hewitt, M., Holmström, J., Hooker, J. N., Işık, T., Johnes, J., Kara, B. Y., Karsu, Ö., Kent, K., Köhler, C., Kunc, M., Kuo, Y-H., Lienert, J., Letchford, A. N., Leung, J., Li, D., Li, H., Ljubić, I., Lodi, A., Lozano, S., Lurkin, V., Martello, S., McHale, I. G., Midgley, G., Morecroft, J. D. W., Mutha, A., Oğuz, C., Petrovic, S., Pferschy, U., Psaraftis, H. N., Rose, S., Saarinen, L., Salhi, S., Song, J-S., Sotiros, D., Stecke, K. E., Strauss, A. K., Tarhan, İ., Thielen, C., Toth, P., Berghe, G. V., Vasilakis, C., Vaze, V., Vigo, D., Virtanen, K., Wang, X., Weron, R., White, L., Woensel, T. V., Yearworth, M., Yıldırım, E. A., Zaccour, G. & Zhao, X., 1/03/2024, In: Journal of the Operational Research Society. 75, 3, p. 423-617 195 p.

    Research output: Contribution to Journal/Magazine › Review article › peer-review

  5. Forthcoming

    Arc routing problems

    Eglese, R. & Letchford, A., 30/01/2024, (Accepted/In press) Encyclopedia of Optimization. Pardalos, P. & Prokopyev, O. (eds.). 3rd ed. Springer

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Entry for encyclopedia/dictionary

  6. 2023
  7. Published

    Matheuristics: survey and synthesis

    Boschetti, M., Letchford, A. & Maniezzo, V., 30/11/2023, In: International Transactions in Operational Research. 30, 6, p. 2840-2866 27 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  8. Published

    On cut polytopes and graph minors

    Kaparis, K., Letchford, A. & Mourtos, I., 30/11/2023, In: Discrete Optimization. 50, 100807.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  9. Published

    On some lower bounds for the permutation flowshop problem

    Letchford, A., Dang, T. & Caceres Gelvez, S., 30/11/2023, In: Computers and Operations Research. 159, 9 p., 106320.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  10. Published

    A survey on exact algorithms for the maximum flow and minimum-cost flow problems

    Cruz Mejía, O. & Letchford, A., 30/09/2023, In: Networks. 82, 2, p. 167-176 10 p.

    Research output: Contribution to Journal/Magazine › Review article › peer-review

  11. Published

    The 4th IMA and OR Society conference on the mathematics of operational research: thoughts from the committee

    Tilley, D., Letchford, A., Syntetos, A., Misener, R. & Liu, K., 1/09/2023, IFORS Newsletter, 18, 3, p. 35-37 3 p.

    Research output: Contribution to specialist publication › Contribution to Magazine - With ISSN › peer-review

  12. Published

    The mathematics of operational research

    Letchford, A., Liu, K., Misener, R., Syntetos, A. & Tilley, D., 1/08/2023, Mathematics Today, 69, 4, p. 103 1 p.

    Research output: Contribution to specialist publication › Article

  13. Published

    On upper bounds for the multiple knapsack assignment problem

    Letchford, A., 04/2023.

    Research output: Contribution to conference - Without ISBN/ISSN › Conference paper › peer-review

  14. Published

    Fast upper and lower bounds for a large-scale real-world arc routing problem

    Boyacı, B., Dang, T. & Letchford, A., 31/01/2023, In: Networks. 81, 1, p. 107-124 18 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  15. Published

    Improving a constructive heuristic for the general routing problem

    Boyacı, B., Dang, T. & Letchford, A., 31/01/2023, In: Networks. 81, 1, p. 93-106 14 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  16. 2022
  17. Published

    Revisiting surrogate relaxation for the multidimensional knapsack problem

    Dokka, T., Letchford, A. & Mansoor, H., 30/11/2022, In: Operations Research Letters. 50, 6, p. 674-678 5 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  18. Published

    On the multiple knapsack assignment problem

    Letchford, A., 08/2022.

    Research output: Contribution to conference - Without ISBN/ISSN › Conference paper › peer-review

  19. Published

    Newsvendor problems: An integrated method for estimation and optimisation

    Liu, C., Letchford, A. & Svetunkov, I., 16/07/2022, In: European Journal of Operational Research. 300, 2, p. 590-601 12 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  20. Published

    A cut-and-branch algorithm for the quadratic knapsack problem

    Djeumou Fomeni, F., Kaparis, K. & Letchford, A., 31/05/2022, In: Discrete Optimization. 44, 2, 18 p., 100579.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  21. Published

    The Boolean quadric polytope

    Letchford, A., 1/05/2022, The Quadratic Unconstrained Binary Optimization Problem: Theory, Algorithms, and Applications. Punnen, A. (ed.). Cham, Switzerland: Springer, p. 97-120 24 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Chapter (peer-reviewed) › peer-review

  22. Published

    Generalised 2-circulant inequalities for the max-cut problem

    Kaparis, K., Letchford, A. & Mourtos, I., 31/03/2022, In: Operations Research Letters. 50, 2, p. 122-128 7 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  23. Published

    On matchings, T-joins and arc routing problems

    Boyacı, B., Dang, T. & Letchford, A., 31/01/2022, In: Networks. 79, 1, p. 20-31 12 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  24. 2021
  25. Published

    Biperspective functions for mixed-integer fractional programs with indicator variables

    Letchford, A., Ni, Q. & Zhong, Z., 30/11/2021, In: Mathematical Programming. 190, 1-2, p. 39-55 17 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  26. Published

    Valid inequalities for quadratic optimisation with domain constraints

    Galli, L. & Letchford, A., 31/08/2021, In: Discrete Optimization. 41, 19 p., 100661.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  27. Published

    Maths of OR – Reflections from the Committee

    Fliege, J., Letchford, A. & Tilley, D., 1/08/2021, Mathematics Today, 57, 4, p. 115 1 p.

    Research output: Contribution to specialist publication › Article

  28. Published

    A separation algorithm for the simple plant location problem

    Galli, L. & Letchford, A., 31/07/2021, In: Operations Research Letters. 49, 4, p. 610-615 6 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  29. Published

    On the complexity of surrogate and group relaxation for integer linear programs

    Dokka, T., Letchford, A. & Mansoor, H., 31/07/2021, In: Operations Research Letters. 49, 4, p. 530-534 5 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

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