2026

Workshop on vehicle routing: Advances and applications, Rotterdam, Netherlands (February 13). Dynamic constraint aggregation for solving large-scale multi-depot bus scheduling problem instances. (Desaulniers, G., Rasouli, N., Soumis, F., Saddoune, M.)

2025

Conference in tribute to François Soumis & Pierre Hansen, Montréal, Canada (October 2-3). Dynamic constraint aggregation for the multi-depot bus scheduling problem. (Desaulniers, G., Rasouli, N., Soumis, F., Saddoune, M.)

INFORMS Computing Society Conference 2025, Toronto, Canada (March 14-16). Electric bus parking, charging and dispatching in real time. (Desaulniers, G., Barra, R., Khalilpourazari, S., Mendoza, J.)

VeRoLog 2025, Trento, Italy (June 16-19). Electric vehicle routing and overnight charging scheduling on a capacitated grid with adjustable power levels. (Desaulniers, G., Yamin, D., Mendoza, J.E.)

2024

Route 2024, Mauerbach, Austria (May 26-29). A branch-price-and-cut algorithm for the multi-commodity two-echelon vehicle routing problem with time windows. (Desaulniers, G., Mhamedi, T., Cherkesly, M.)

Odysseus 2024, Carmona, Spain (May 19-24). The electric vehicle routing and overnight charging scheduling problem on a multigraph. (Desaulniers, G., Yamin, D., Mendoza, J.E.)

Optimization Days 2024, Montréal, Canada (May 6-8). Tutorial on Branch-price-and-cut for electric vehicle routing. (Desaulniers, G.)

2023

TSL conference 2023, Chicago, USA (July 23-26). Learning dual inequalities for column generation. (Desaulniers, G., Popovic, L., Cappart, Q.)

Column Generation 2023, Montréal, Canada (May 16-19). Learning dual inequalities for column generation. (Desaulniers, G., Popovic, L., Cappart, Q.)

2022

INFORMS annual meeting, Indianapolis, USA (October 16-19). Machine-learning-based column selection in column generation. (Desaulniers, G., Morabit, M., Lodi, A.)

INFORMS annual meeting, Indianapolis, USA (October 16-19). A fast column-generation-based heuristic for electric bus scheduling. (Desaulniers, G., Gerbaux, J., Cappart, Q.)

Journées de l'Optimisation 2022, Montréal, Canada (May 16-18). Branch-and-cut-and-price for electric vehicle routing problem with time windows, piecewise-linear recharging and capacitated recharging stations. (Desaulniers, G., Lam, E., Stuckey, P.J.)

2021

INFORMS Transportation Science and Logistics Society, Webinar series (April 16). A branch-price-and-cut algorithm for the two-echelon vehicle routing problem with time windows. (Desaulniers, G., Andersson, H., Cherkesly, M., Mhamedi, T.)

2020

INFORMS annual meeting, Virtual (November 7-13). Designing compact routes for parcel delivery in postal agencies. (Desaulniers, G., Bretin, A., Rousseau, L.-M.)

Seminar, Chair of Logistics Management, Johannes Gutenberg Universität Mainz, Virtual (December 1). A branch-price-and-cut algorithm for the two-echelon vehicle routing problem with time windows. (Desaulniers, G., Andersson, H., Cherkesly, M., Mhamedi, T.)

2019

Workshop on vehicle routing: Advances and applications, Rotterdam, Netherlands (November 14). Column selection and aggregated row generation in branch-and-price algorithms for vehicle routing. (Desaulniers, G., Morabit, M., Lodi, A, Costa, L., Contardo, C.)

VeRoLog 2019, Seville, Spain (June 3-5). Column selection by machine learning in exact branch-price-and-cut algorithms. (Desaulniers, G., Morabit, M., Lodi, A.)

2018

23rd International Symposium on Mathematical Programming, Bordeaux, France (July 1-6). The vehicle routing problem with stochastic and correlated travel times. (Desaulniers, G., Rostami, B., Errico, F., Lodi, A.)

Odysseus 2018, Cagliari, Italy (June 3-8). Arc-pair variable fixing in branch-price-and-cut algorithms for vehicle routing. (Desaulniers, G., Gschwind, T., Irnich, S.)

VeRoLog PhD school 2018, Cagliari, Italy (June 1-2). Branch-price-and-cut for vehicle routing. (Desaulniers, G.)

Route 2018, Snekkersten, Denmark (May 27-30). The vehicle routing problem with stochastic and correlated travel times. (Desaulniers, G., Rostami, B., Errico, F., Lodi, A.)

Journées de l'Optimisation 2018, Montréal, Canada (May 7-9). Arc-pair variable fixing in branch-price-and-cut algorithms for vehicle routing. (Desaulniers, G., Gschwind, T., Irnich, S.)

2017

IFORS 2017, Quebec City, Canada (July 17-21). The vehicle routing problem wth time windows and a fragility constraint. (Desaulniers, G., Altman, C., Errico, F.)

VeRoLog 2017, Amsterdam, Netherlands (July 10-12). Branch-price-and-cut for vehicle routing: Recent advances. (Desaulniers, G.)

2016

INFORMS, Nashville, USA (November 13-16). Integral column generation for crew pairing. (Desaulniers, G., Tahir, A., Elhallaoui, I.)

TRISTAN IX, Oranjestad, Aruba (June 12-17). Selective pricing in branch-and-price algorithms for vehicle routing. (Desaulniers, G., Contardo, C., Pecin, D.)

Column Generation 2016, Buzios, Brazil (May 22-25). Selective pricing in branch-and-price algorithms for vehicle routing. (Desaulniers, G., Contardo, C., Pecin, D.)

2015

INFORMS, Philadelphia, USA (November 1-4). Airline fleet assignment with stochastic demand and limited re-fleeting recourse actions. (Desaulniers, G., Lasalle Ialongo, D.)

CORS/INFORMS International Conference, Montréal, Canada (June 14-17). Inventory routing: Minimizing the logistics ratio. (Desaulniers, G., Archetti, C., Speranza, G.)

Odysseus 2015, Ajaccio, France (May 31 - June 5). A branch-and-price algorithm for a production-routing problem with short-lifespan products. (Desaulniers, G., Dayarian, I.)

NOW 2015, La Rochelle, France (May 18-20). The vehicle routing problem with time windows: Solving 200-customer instances eaxctly. (Desaulniers, G., Pecin, D., Contardo, C., Uchoa, E.)

2014

TSL workshop 2014, Chicago, USA (June 29 - July 2). A priori optimization with recourse for the vehicle routing problems with hard time windows and stochastic service times. (Desaulniers, G., Errico, F., Gendreau, M., Rei, W., Rousseau, L.-M.)

Route 2014, Snekkersten, Denmark (June 1-4). Branch-price-and-cut algorithms for electric vehicle routing problems with time windows. (Desaulniers, G., Errico, F., Irnich, S., Schneider, M.)

2013

TRISTAN VIII, San Pedro de Atacama, Chili (June 9-14). Branch-price-and-cut for inventory routing under the maximum-level replenishment policy. (Desaulniers, G., Rakke, J.G., Coelho, L.C.)

2012

EURO XXV, Vilnius, Lituania (July 8-11). 20 years of column generation for the vehicle routing problem with time windows.

Odysseus 2012, Mykonos, Greece (May 21-25). A branch-price-and-cut algorithm for the workover rig routing problem (Desaulniers, G., Ribeiro, G. et Desrosiers, J.).

Journées de l'Optimisation, Montréal, Canada (May 7-9). A branch-price-and-cut algorithm for the workover rig routing problem (Desaulniers, G., Ribeiro, G. et Desrosiers, J.).

2011

Route 2011, Sitges, Spain (May 31 - June 3). A branch-price-and-cut algorithm for the min-max k-vehicle windy rural postman problem (Desaulniers, G., Lessard, F., Benavent, E., Corberan, A., Plana, I. et Sanchis, J.M.).

Journées de l'Optimisation, Montréal, Canada (May 2-4). A branch-price-and-cut algorithm for the min-max k-vehicle windy rural postman problem (Desaulniers, G., Lessard, F., Benavent, E., Corberan, A., Plana, I. et Sanchis, J.M.).

2010

INFORMS, Austin, USA (November 6-10). A stabilized dynamic constraint aggregation/column generation method for the multi-depot vehicle scheduling problem (Desaulniers, G., Benchimol, P., Desrosiers, J.).

Summer School on Column Generation, Darmstadt, Germany (August 23-27). Constrained vehicle routing and shortest path prblems (Desaulniers, G.).

Summer School on Column Generation, Darmstadt, Germany (August 23-27). Dynamic constraint aggregation (Desaulniers, G.).

TRISTAN VII, Tromso, Norway (June 20-25). Large neighborhood search heuristics for propane delivery (Desaulniers, G., Prescott-Gagnon, E., Rousseau, L.-M.).

MITACS/CORS Conference, Edmonton, Canada (May 25-28). Tutorial: Column Generation in Transportation (Desaulniers, G.).

CIRRELT Spring School on Combinatorial Optimization in Logistics, Montréal, Canada (May 17-20). Airline Crew Scheduling by Column Generation (Desaulniers, G., Soumis, F.).

2009

DOMinant workshop, Molde, Norway (September 20-22). Vehicle routing for propane delivery (Desaulniers, G., Prescott-Gagnon, E., Bélanger-Roy, B., Rousseau, L.-M.).

Route 2009, Skodsborg, Denmark (June 21-24). Branch-Price-and-Cut for Vehicle Routing with Split Deliveries and Time Windows: Cuts Defined on the Master Problem Variables (Desaulniers, G., Archetti, C., Bouchard, M.).

CORS/INFORMS International Meeting, Toronto, Canada (June 14-17). Split Delivery Vehicle Routing with Time Windows: An Improved Branch-Price-and-Cut Method (Desaulniers, G., Archetti, C., Bouchard, M.).

Odysseus 2009, Çesme, Turkey (May 26-29). Enhanced Branch-Price-and-Cut for Vehicle Routing with Split Deliveries and Time Windows (Desaulniers, G., Archetti, C., Bouchard, M.).

Journées de l'Optimisation, Montréal, Canada (May 4-6). Split Delivery Vehicle Routing Problem with Time Windows: An Improved Branch-Price-and-Cut Method (Desaulniers, G. et Archetti, C.).

2008

Column Generation 2008, Aussois, France (June 17-20) Branch-and-Price-and-Cut for the Split Delivery Vehicle Routing Problem with Time Windows (Desaulniers, G.).

SCRO/Journées de l'Optimisation, Québec, Canada (May 12-14). Branch-and-Price-and-Cut for the Split Delivery Vehicle Routing Problem with Time Windows (Desaulniers, G.).

Optimization of Maritime Transportation, Trondheim, Norway (March 3). Dynamic Constraint Aggregation in Branch-and-Price (Desaulniers, G.) .

2007

Séminaire de Polygistique, Montréal, Canada (November 13). La génération de colonnes pour le transport de passagers (Desaulniers, G.).

Operations Research 2007, Saarbruecken, Germany (September 5-7). Branch-and-Price with Dynamic Constraint Aggregation in Passenger Transportation (Desaulniers, G.) .

MIC 2007, Montreal, Canada (June 25-29). A Large Neighborhood Search Algorithm for the Vehicle Routing Problem with Time Windows (Desaulniers, G., Prescott-Gagnon, E. et Rousseau, L.-M.).

Séminaire du GERAD, Montreal, Canada (May 31). Column Generation in Passenger Transportation (Desaulniers, G.).

Route 2007, Jeykill Island, USA (May 13-16). A Large Neighborhood Search Algorithm for the Vehicle Routing Problem with Time Windows (Desaulniers, G., Prescott-Gagnon, E. et Rousseau, L.-M.).

2006

Odysseus 2006, Altea, Spain (May 23-26). Comparison of Heuristic Approaches for the MDVSP (Desaulniers, G., Pepin, A., Hertz, A. et Huisman, D.).

GERAD Summer School on Column Generation, Montreal, Canada (May 15-19). Heuristic Integer Solutions (Desaulniers, G.).

GERAD Summer School on Column Generation, Montreal, Canada (May 15-19). Master Problem Issues: Dynamic Constraint Aggregation and Fixed Cost Management (Desaulniers, G.).

CORS/Optimization Days Joint conference, Montreal, Canada (May 8-10). Parking Buses in a Depot using Block Patterns: A Benders Decomposition Approach for Minimizing Type Mistmatches (Desaulniers, G., Hamdouni, M. et Soumis, F.).

CORS/Optimization Days Joint conference, Montreal, Canada (May 8-10). Tabu Search and New Cutting Planes to Speed Up an Exact Branch-and-Price Method for the VRPTW (Desaulniers, G., Lessard, F. et Hadjar, A.).

2005

Route 2005, Bertinoro, Italy (June 23-26). Speeding Up Column Generation with Dynamic Constraint Aggregation (Desaulniers, G., Elhallaoui, I. et Soumis, F.).

International colloquium for the 25th anniversary of GERAD, Montreal, Canada (May 11-13). Column Generation with Dynamic Constraint Aggregation for a Train Unit Scheduling Problem (Desaulniers, G., Elhallaoui, I. et Soumis, F.).

2004

GERAD's thematic workshop on Optimization in Public Transit, Montreal, Canada (June 3). Dispatching Buses in a Depot using Block Patterns (Desaulniers, G., Hamdouni, M., Soumis, F., Marcotte, O., Van Putten, M.).

CORS/INFORMS International Meeting, Banff, Canada (May 16-19). Parking and Dispatching Buses in a Depot using Block Patterns (Desaulniers, G., Hamdouni, M., Soumis, F., Marcotte, O., Van Putten, M.).

Spring School on Transportation, HEC Montreal, Canada (May 12-14). Public Transit Planning (Desaulniers, G.).

Journées de l'Optimisation, Montreal, Canada (May 10-12). Dispatching Buses in a Depot using Block Patterns (Desaulniers, G., Hamdouni, M., Soumis, F., Marcotte, O., Van Putten, M.).

ECOPT Workshop on Optimization in Public Transport, Rotterdam, Netherlands (February 19). Bus Dispatching in Parking Depots using Block Patterns (Desaulniers, G., Hamdouni, M., Soumis, F., Marcotte, O.).

2003

ODYSSEUS , Palermo, Italy (May 27-30). Managing Fixed Costs in Vehicle and Crew Scheduling Problems Solved by a Branch-and-Price Approach (Desaulniers, G.).

Journées de l'Optimisation, Montreal, Canada (May 5-7). Bus Dispatching in Parking Depots using Block Patterns (Desaulniers, G., Hamdouni, M., Soumis, F.).

Journées de l'Optimisation, Montreal, Canada (May 5-7). Managing Fixed Costs in Vehicle and Crew Scheduling Problems (Desaulniers, G.).

2002

IMA, Travel and Transportation Workshop, Minneapolis, USA (November 11-15). Bus and Driver Scheduling in Urban Mass Transit Systems (Desaulniers, G.).

Journées de l'Optimisation, Montreal, Canada (May 6-8). Assigning Shift Activities (Desaulniers, G., Omari, Z., Lessard, F., et Dubois, M.).

2001

TRISTAN IV, Ponta Delgada, Azores, Portugal (June 13-19). Simultaneous Multi-Depot Bus and Driver Scheduling (Desaulniers, G., Cordeau, J.-F., Desrosiers, J. et Villeneuve, D.).

2000

Journées de l'Optimisation, Montreal, Canada (May 15-17). Schedule Synchronization for a Fleet Assignment Problem in Rail Transportation (Desaulniers, G., Soumis, F., et Dubois, M.).

Journées de l'Optimisation, Montreal, Canada (May 15-17). Simultaneous Vehicle and Crew Scheduling in Urban Mass Transit: Recent Results (Desaulniers, G., Villeneuve, B., Desrosiers, J., et Haase, K.).

INFORMS, Salt Lake City, USA (May 7-10). Simultaneous Vehicle and Crew Scheduling in Urban Mass Transit: Recent Results (Desaulniers, G., Villeneuve, B., Desrosiers, J., et Haase, K.).

1999

INFORMS, Philadelphia, USA (November 7-10). Strategic Fleet Planning with Schedule Flexibility (Desaulniers, G., Soumis, F., et Dubois, M.).

Journées de l'Optimisation, Montréal, Canada (May 10-12). Simultaneous Vehicle and Crew Scheduling (Desaulniers, G., Haase, K., et Desrosiers, J.).

INFORMS, Cincinnati, USA (May 2-5). Simultaneous Vehicle and Crew Scheduling (Desaulniers, G., Haase, K., et Desrosiers, J.).

1998

EURO XVI, Bruxelles, Belgium (July 12-15). ALTITUDE: An Optimization System for the Management of Operations in Air Transport (Desaulniers, G., Desrosiers, J., Gamache, M., Solomon, M.M. et Soumis, F.).

EURO XVI, Bruxelles, Belgium (July 12-15). RAIL-WAYS: a Fleet Assignement System for Passenger Railway Companies, (Desaulniers, G., Cordeau, J.-F., Desrosiers, J., Lingaya, N. et Soumis, F.).

TRISTAN III, San Juan, Puerto Rico (June 17-23). RAIL-WAYS: a Fleet Assignement System for Passenger Railway Companies, (Desaulniers, G., Cordeau, J.-F., Desrosiers, J., Lingaya, N. et Soumis, F.).

INFORMS, Montréal, Canada (April 26-29). RAIL-WAYS: a Fleet Assignement System for Passenger Railway Companies, (Desaulniers, G., Cordeau, J.-F., Desrosiers, J., Lingaya, N., Soumis, F.).

1997

16^th International Symposium on Mathematical Programming, Lausanne, Switzerland (August 24-29). Crew Pairing for a Regional Carrier, (Desaulniers, G., Desrosiers, J., Lasry, A. et Solomon, M.M.).

Journées de l'Optimisation, Montréal, Canada (May 12-14). On a Shortest Path with Time Windows and Linear Waiting Costs, (Desaulniers, G. et Villeneuve, D.).

Journées de l'Optimisation, Montréal, Canada (May 12-14). The Equipment Cycling Problem at VIA Rail, (Desaulniers, G., Cordeau, J.-F., Lingaya, N., Desrosiers, J. et Soumis, F.).

INFORMS, San Diego, USA (May 4-7). On a Shortest Path with Time Windows and Linear Waiting Costs, (Desaulniers, G. et Villeneuve, D.).

INFORMS, San Diego, USA (May 4-7). Locomotive and Car Assignment for a Passenger Railway Company, (Desaulniers, G., Cordeau, J.-F., Lingaya, N., Desrosiers, J. et Soumis, F.).