academic web-page

Research fellow (CR1)
INRIA Bordeaux – Sud‐Ouest
RealOpt team
Address : Institut de Mathématique 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)

BaPCod (C++ library implementing generic Branch-Cut-and-Price) (if you want to use it, you can send me a request)

Recent slides


Research reports

Papers in international journals and long papers in conference proceedings

  1. A. Pessoa, R. Sadykov, E. Uchoa, F. Vanderbeck. "A Generic Exact Solver for Vehicle Routing and Related Problems",
    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. Preliminary version: download
  2. 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 , In Press, 2019.
    DOI: 10.1007/s13675-019-00113-9 . Preliminary version: download
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. 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
  22. 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
  23. 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

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: July 17, 2019