academic web-page

Research fellow (CR HDR)
INRIA Bordeaux – Sud‐Ouest
RealOpt team
Address : Institut de Mathématiques de Bordeaux
351, cours de la Liberation
33405 Talence, France
Office : number 269 (building A33)
Phone : (+33) 5 40 00 60 52
Fax : (+33) 5 40 00 21 17
Email : Ruslan(point)Sadykov(at)inria(point)fr
Software | Recent slides | Publications | Other slides | Test instances | Education and experience| Teaching/Enseignement


Exact Branch-Cut-and-Price Solver for Vehicle Routing and Related Problems (can be downloaded and used for free for academic purposes)

Coluna.jl: an easy-to-use and flexible Branch-Cut-and-Price framework written in Julia

Recent slides


Research reports

Papers in international journals and long papers in conference proceedings

  1. A. Pessoa, R. Sadykov, E. Uchoa. "Solving Bin Packing Problems Using VRPSolver Models"
    SN Operations Research Forum, in Press, accepted in 2020.
    Preliminary version: download
  2. A. Pessoa, M. Poss, R. Sadykov, F. Vanderbeck. "Branch-and-cut-and-price for the robust capacitated vehicle routing problem with knapsack uncertainty"
    Operations Research, Ahead of print, accepted in 2020.
    DOI: 10.1287/opre.2020.2035 Preliminary version: download
  3. R. Sadykov, E. Uchoa, A. Pessoa. "A bucket graph based labeling algorithm with application to vehicle routing"
    Transportation Science, 55(1):4-28, 2021.
    DOI: 10.1287/trsc.2020.0985. Preliminary version: download
  4. A. Pessoa, R. Sadykov, E. Uchoa, F. Vanderbeck. "A Generic Exact Solver for Vehicle Routing and Related Problems",
    Mathematical Programming B, 183:483-523, 2020.
    DOI: 10.1007/s10107-020-01523-z . Preliminary version: download
    Short version appeared in Lecture Notes in Computer Science, 11480:354-369, 2019.
    (Proceedings of the 20th Conference on Integer Programming and Combinatorial Optimization IPCO'2019, Ann Arbor, Michigan, USA)
    DOI: 10.1007/978-3-030-17953-3_27.
  5. E. Queiroga, Y. Frota, R. Sadykov, A. Subramanian, E. Uchoa, Th. Vidal. "On the exact solution of vehicle routing problems with backhauls"
    European Journal of Operations Research, 287(1):76-89, 2020.
    DOI: 10.1016/j.ejor.2020.04.047. Preliminary version: download
  6. L. Gouveia, M. Leitner, M. Ruthmair, R. Sadykov. "Corrigendum to “Extended Formulations and Branch-and-Cut Algorithms for the Black-and-White Traveling Salesman Problem” [European Journal of Operational Research, 262(3) 2017, 908–928]"
    European Journal of Operations Research, 285(3):1199-1203, 2020.
    DOI: 10.1016/j.ejor.2020.02.039
  7. T. Bulhoes, R. Sadykov, A. Subramanian, E. Uchoa. "On the exact solution of a large class of parallel machine scheduling problems"
    Journal of Scheduling, 23:411-429, 2020.
    DOI: 10.1007/s10951-020-00640-z. Preliminary version: download
  8. G. Marques, R. Sadykov, J.-Ch. Deschamps, R. Dupas. "An improved branch-cut-and-price algorithm for the two-echelon capacitated vehicle routing problem"
    Computers and Operations Research, 114:104833, 2020.
    DOI: 10.1016/j.cor.2019.104833. Preliminary version: download
  9. F. Clautiaux, R. Sadykov, F. Vanderbeck, Q. Viaud. "Pattern based diving heuristics for a two-dimensional guillotine cutting-stock problem with leftovers".
    EURO Journal on Computational Optimization , 7(3):265-297, 2019.
    DOI: 10.1007/s13675-019-00113-9 . Preliminary version: download
  10. R. Sadykov, F. Vanderbeck, A. Pessoa, I. Tahiri, E. Uchoa. "Primal heuristics for Branch-and-Price: the assets of diving methods".
    INFORMS Journal on Computing, 31(2):251-267, 2019.
    DOI: 10.1287/ijoc.2018.0822. Preliminary version: download
  11. A. Pessoa, R. Sadykov, E. Uchoa. "Enhanced Branch-Cut-and-Price Algorithm for Heterogeneous Fleet Vehicle Routing Problems"
    European Journal of Operations Research, 270(2):530-543, 2018.
    DOI: 10.1016/j.ejor.2018.04.009. Preliminary version: download
  12. T. Bulhoes, R. Sadykov, E. Uchoa. "A branch-and-price algorithm for the Minimum Latency Problem"
    Computers & Operations Research, 93:66-78, 2018.
    DOI: 10.1016/j.cor.2018.01.016. Preliminary version: download
  13. F. Clautiaux, R. Sadykov, F. Vanderbeck, Q. Viaud. "Combining dynamic programming with filtering to solve a four-stage two-dimensional guillotine-cut bounded knapsack problem".
    Discrete Optimization, 29:18-44, 2018.
    DOI: 10.1016/j.disopt.2018.02.003. Preliminary version: download
  14. A. Pessoa, R. Sadykov, E. Uchoa, F. Vanderbeck. "Automation and combination of linear-programming based stabilization techniques in column generation".
    INFORMS Journal on Computing, 30(2):339-360, 2018.
    DOI: 10.1287/ijoc.2017.0784 Preliminary version: download
  15. M. Gérard, F. Clautieux, R. Sadykov. "Column generation based approaches for a tour scheduling problem with a multi-skill heterogeneous workforce".
    European Journal of Operations Research , 252(3):1019-1030, 2016.
    DOI: 10.1016/j.ejor.2016.01.036 Preliminary version: download
  16. B. Detienne, R. Sadykov, Sh. Tanaka. "The two-machine flowshop total completion time problem: branch-and-bound algorithms based on network-flow formulation".
    European Journal of Operations Research , 252(3):750-760, 2016.
    DOI: 10.1016/j.ejor.2016.02.003 Preliminary version: download
  17. R. Sadykov, A. A. Lazarev, V. Shiryaev, A. Stratonnikov. "Solving a Freight Railcar Flow Problem Arising in Russia"
    OpenAccess Series in Informatics (OASIcs), 33:55-67, 2013.
    (Proceedings of 13th Workshop on Algorithmic Approaches for Transportation Modelling, Optimization, and Systems ATMOS'2013, Sophia Antipolis, France)
    DOI: 10.4230/OASIcs.ATMOS.2013.55
  18. A. Pessoa, R. Sadykov, E. Uchoa, F. Vanderbeck. "In-Out Separation and Column Generation Stabilization by Dual Price Smoothing",
    Lecture Notes in Computer Science, 7933:354-365, 2013.
    (Proceedings of the 12th International Symposium on Experimetal Algorithms SEA'2013, Rome, Italy)
    DOI: 10.1007/978-3-642-38527-8_31
  19. R. Sadykov, F. Vanderbeck. "Column Generation for Extended Formulations"
    EURO Journal on Computational Optimization, 1(1-2):81-115, 2013.
    DOI: 10.1007/s13675-013-0009-9 Preliminary version: download
    Short version appeared in Electronic Notes in Discrete Mathematics, 37:357-362, 2011.
    (6th Latin-American Algorithms, Graphs and Optimization Symposium, Bariloche, Argentina)
    DOI: 10.1016/j.endm.2011.05.061
  20. R. Sadykov, F. Vanderbeck. "Bin Packing with Conflicts: a generic Branch-and-Price algorithm"
    INFORMS Journal on Computing, 25(2):244-255, 2013.
    DOI: 10.1287/ijoc.1120.0499 Preliminary version: download
  21. P. Pesneau, R. Sadykov, F. Vanderbeck. "Feasibility pump heuristics for column generation approaches",
    Lecture Notes in Computer Science, 7276:332-343, 2012.
    (Proceedings of the 11th International Symposium on Experimetal Algorithms SEA'2012, Bordeaux, France)
    DOI: 10.1007/978-3-642-30850-5_29
  22. R. Sadykov. "Scheduling incoming and outgoing trucks at cross docking terminals to minimize the storage cost"
    Annals of Operations Research, 201(1):423-440, 2012.
    DOI: 10.1007/s10479-012-1232-0 Preliminary version: download
  23. R. Sadykov. "A dominant class of schedules for malleable jobs in the problem to minimize the total weighted completion time",
    Computers and Operations Research , 39(6):1265-1270, 2012.
    DOI: 10.1016/j.cor.2011.02.023< Preliminary version: download
  24. C. Joncour, S. Michel, R. Sadykov, D. Sverdlov, F.Vanderbeck. "Column generation based heuristics",
    Electronic Notes in Discrete Mathematics, 36:695-702, 2010.
    (International Symposium on Combinatorial Optimization ISCO'2010, Hammamet, Tunisia)
    DOI: 10.1016/j.endm.2010.05.088
  25. Ph. Baptiste, R. Sadykov. "Time-indexed formulations for scheduling chains on a single machine: An application to airborne radars",
    European Journal of Operations Research , 203(2):476-483, 2010.
    DOI: 10.1016/j.ejor.2009.07.037 Preliminary version: download
  26. Ph. Baptiste, R. Sadykov. "On scheduling a single machine to minimize a piecewise linear objective function : A compact MIP formulation",
    Naval Research Logistics , 56(6):487-502, 2009.
    DOI: 10.1002/nav.20352 Preliminary version: download
  27. R. Sadykov. "A branch-and-check algorithm for minimizing the sum of the weights of the late jobs on a singlemachine with release dates",
    European Journal of Operations Research, 189(3):1284-1304, 2008.
    DOI: 10.1016/j.ejor.2006.06.078 Preliminary version: CORE Discussion Paper 2005/57
  28. A.A. Lazarev, R.R. Sadykov, S.V. Sevastianov. "A scheme of approximation solution of problem 1|rj|Lmax",
    Journal of Applied and Industrial Mathematics, 1(4):468-480, 2007.
    DOI: 10.1134/S1990478907040102
  29. R. Sadykov, L.A. Wolsey. "Integer Programming and Constraint Programming in Solving a Multi-Machine Assignment Scheduling Problem with Deadlines and Release Dates",
    INFORMS Journal on Computing, 18(2):209-217, 2006.
    DOI: 10.1287/ijoc.1040.0110 Preliminary version: CORE Discussion Paper 2003/81
  30. R. Sadykov. "A hybrid branch-and-cut algorithm for the one-machine scheduling problem",
    Lecture Notes in Computer Science, 3011:409-414, 2004.
    (Proceedings of the 1st International Conference CP-AI-OR'2004, Nice, France)
    DOI: 10.1007/b96957

Habilitation à diriger des recherches

Other international conferences and workshops

Other slides

Test instances

Education and experience

I got my Ph.D. in 2006 from the Center for Operations Research and Econometrics (Université Catholique de Louvain). My supervisor was Prof. Laurence A. Wolsey .
Thesis : ''Integer Programming-based Decomposition Approaches for Solving Machine Scheduling Problems''.

In the same year, I defended my russian Ph.D. thesis ''Algorithms for single machine sheduling problems with the criteria Lmax and wjUj'' at the Dorodnicyn Computing Centre of the Russian Academy of Sciences. My russian Ms. and Ph.D. supervisor was Prof. Alexander A. Lazarev.

During two years (2006‒08), I was a post-doc and a member of the Algorithms and Optimisation team in the Informatics Laboratory (LIX) of the Ecole Polytechnique , where I worked with Philippe Baptiste .


Last updated: February 12, 2021