Presentations


Most current talks by topic

All talks by year

2024

  • T.K.R., Latest Developments in the MibS Solver for Mixed Integer Bilevel Optimization, EURO Conference 2024, Copenhagen, June 2024 (PDF)
  • T.K.R., It’s Farkas All the Way Down: A Generalized Farkas Lemma and Its Implications, MIP Workshop 2024, Lexington, KY, June 2024 (PDF)
  • T.K.R., Branch and Cut for Bilevel Integer Linear Optimization, Third International Workshop on Bilevel Optimization, Rancagua, Chile, January 2024 (PDF)
  • M. Schmidt, T. Kleinert, I. Ljubic, T.K.R., J. Thurauf, BOBILib – A Bilevel Optimization Benchmark Instance Library, International Symposium on Mathematical Programming 2024, Montreal (PDF)
  • F. Battista and T.K.R., A Branch-and-Cut Algorithm for Mixed Integer Bilevel Linear Optimization Based on Improving Directions, International Symposium on Mathematical Programming 2024, Montreal (PDF)

2023

  • T.K.R., Parametric Inequalities in Mixed Integer (Non?) Linear Optimization, Workshop on Optimization at the Second Level, Mittag Leffler Institute, Sweden, July 2023 (PDF)
  • T.K.R. and S. Bolusani, Parametric Inequalities in Mixed Integer Linear Optimization, INFORMS Annual Meeting, Phoenix, AZ, October 2023 (PDF)
  • F. Battista and T.K.R., Exploiting Dual Functions in Mixed Integer Bilevel Linear Programs, INFORMS Annual Meeting, Phoenix, AZ, October 2023 (PDF)

2022

  • T.K.R., Generalized Duality and Value Functions, Workshop on Optimization at the Second Level, Schloss Dagstuhl, Germany, November 2022 (PDF)

2021

  • T.K.R., Duality and Meaning in Computation, INFORMS Annual Meeting, Anaheim, CA, November 2021
  • S. Fallah, T.K.R., and L.V. Snyder, A Method of Constructing the Efficient Frontier by Exploiting the Value Function, INFORMS Annual Meeting, Anaheim, CA, November 2021
  • Y. Xie and T.K.R., Mixed Integer Bilevel Linear Optimization With Bounded Rationality, INFORMS Annual Meeting, Anaheim, CA, November 2021
  • M.H. Shaelaie, T.K.R., and L.V. Snyder, Towards A Unified Framework For Branch And Bound And Reinforcement Learning, INFORMS Annual Meeting, Anaheim, CA, November 2021
  • T.K.R., Duality and Meaning in Computation, UG Workshop, Berlin, October 2021 (PDF)

2020

  • S. Fallah, T.K.R., and L.V. Snyder, A Branch-and-Price Algorithm for Integrated Location, Routing and Scheduling Problems, INFORMS Annual Meeting (Virtual), November 2020
  • X. Shi, O.A. Prokopyev, T.K.R., A Scalable Bounding Approach for the Mixed Integer Bilevel Program, INFORMS Annual Meeting (Virtual), November 2020
  • T.K.R., S. Bolusani, and S. Tahernejad, A Framework for Generalized Benders’ Decomposition and Its Application to Multilevel Optimization, INFORMS Annual Meeting (Virtual), November 2020 (PDF)

2019

  • T.K.R. and S. Bolusani, Parametric Valid Inequalities, INFORMS Annual Meeting, Seattle, WA, October 2019 (PDF)
  • T.K.R., S. Bolusani and S. Tahernejad, Multistage/Multilevel Discrete Optimization, International Conference on Stochastic Programming, Trondheim, Norway, July 2019 (PDF)
  • T.K.R., Duality in Integer Linear Programming, Joint Mathematics Meetings, Baltimore, MD, January 2019 (PDF)
  • T.K.R., S.J. Maher, and Y. Shinano, Assessing Performance of Parallel MILP Solvers, UG Workshop, Berlin, Germany, January 2019 (PDF)
  • T.K.R., Separation, Inverse Optimization, and Decomposition: Connecting the Dots, 23rd Workshop on Combinatorial Optimization, Aussois, France, January 2019 (PDF)

2018

  • S. Tahernejad and T.K.R., Two-stage Mixed-integer Stochastic Bilevel Optimization Problems, INFORMS Annual Meeting, Phoenix, AZ, November 2018
  • S. Bolusani, F. Qiu, T.K.R., A. Botterud, and K. Kim, Warm Starting for Security Constrained Deterministic Unit Commitment, INFORMS Annual Meeting, Phoenix, AZ, November 2018
  • T.K.R., Introduction to COIN-OR and the Optimization Suite, COIN fORgery: Developing Open Source Tools for Operations Research, Institute for Mathematics and Its Applications, Minneapolis, MN, October 2018 (PDF)
  • T.K.R., Introduction to Project Management in COIN-OR, COIN fORgery: Developing Open Source Tools for Operations Research, Institute for Mathematics and Its Applications, Minneapolis, MN, October 2018 (PDF)
  • T.K.R., Introduction to Build and Test in COIN-OR, COIN fORgery: Developing Open Source Tools for Operations Research, Institute for Mathematics and Its Applications, Minneapolis, MN, October 2018 (PDF)
  • S. Bolusani and T.K.R., Generalized Benders’ Algorithm for Mixed Integer Bilevel Linear Optimization, MOPTA 2018, Bethlehem, PA, August 2018 (PDF)
  • T.K.R., Parallel Solution of Mixed Integer Linear Programs, New Computing-driven Opportunities for Optimization, Wuyishan, Fujian, China, August 2018 (PDF)
  • T.K.R., Separation, Inverse Optimization, and Decomposition: Some Observations, Peking University Workshop on Optimization Theory and Methods, Beijing, China, August 2018 (PDF)
  • S. Bolusani and T.K.R., Generalized Benders’ Algorithm for Mixed Integer Bilevel Linear Optimization, Second International Workshop of Bilvel Programming, Lille, France, June 2018
  • S. Tahernejad, T.K.R., Valid Inequalities for Mixed Integer Bilevel Linear Optimization (poster), Second International Workshop of Bilvel Programming, Lille, France, June 2018 (PDF)
  • S. Tahernejad, T.K.R., Valid Inequalities for Mixed Integer Bilevel Linear Optimization (poster), Mixed Integer Programming Workshop, Clemson, SC, June 2018 (PDF)
  • T.K.R., S.J. Maher, and Y. Shinano, Assessing Performance of Parallel MILP Solvers, International Symposium on Mathematical Programming, Bordeaux, France, July 2018 (PDF)
  • T.K.R., S.J. Maher, and Y. Shinano, Assessing Performance of Parallel MILP Solvers, SIAM Conference on Parallel Processing for Scientific Computing, Tokyo, Japan, March 2018
  • T.K.R., Multilevel Optimization and Game Theory: Applications and Algorithms, Tsinghua University, Beijing, China, March 2018

2017

  • T.K.R., Parametric Valid Inequalities, INFORMS Annual Meeting, Houston, TX, October 2017 (PDF)
  • A. Bulut and T.K.R., Computational Approaches to Mixed Integer Second Order Cone Optimization, INFORMS Annual Meeting, Houston, TX, October 2017 (PDF)
  • S. Taherjejad, T.K.R., and S. DeNegre, A Branch-and-Cut Algorithm for Mixed Integer Bilevel Linear Optimization Problems and Its Implementation, INFORMS Annual Meeting, Houston, TX, October 2017 (PDF)
  • S. Bolusani and T.K.R., Generalized Benders’ Algorithm for Mixed Integer Bilevel Linear Optimization, INFORMS Annual Meeting, Houston, TX, October 2017
  • T.K.R., Open Source Tools for Optimization in Python, Sage Days, Institute for Mathematics and Its Application, Minneapolis, MN, August 2017 (PDF)
  • A. Bulut and T.K.R., Computational Approaches to Mixed Integer Second Order Cone Optimization, SIAM Conference on Optimization, Vancouver, BC, Canada, May 2017
  • T.K.R., S.J. Maher, and Y. Shinano, Assessing Performance of Parallel MILP Solvers: How Are We Doing, Really?, SIAM Conference on Optimization, Vancouver, BC, Canada, May 2017 (PDF)
  • T.K.R., Algorithms: Why and How, Guest Lecture, Introduction to Operations Research, Cal Poly, San Luis Obispo, CA (PDF)
  • T.K.R., S. DeNegre, M. Guzelsoy, and A. Hassanzadeh, and S. Tahernejad, Duality, Multilevel Optimization, and Game Theory: Algorithms and Applications, Virginia Tech, Blacksburg, VA, February 2017 (PDF)

2016

  • T.K.R., Duality and Warm-starting in MILP, Zuse Institute Berlin, Berlin, Germany, September 2016 (PDF)
  • T.K.R., S. DeNegre, M. Guzelsoy, and A. Hassanzadeh, and S. Tahernejad Duality, Multilevel Optimization, and Game Theory: Algorithms and Applications, Norwegian School of Economics, Bergen, Norway, September 2016 (PDF)
  • T.K.R., The COIN-OR Optimization Suite: Open Source Tools for Optimization, International Congress on Mathematical Software, Berlin, Germany, July 2016
  • T.K.R., Separation, Inverse Optimization, and Decomposition: Some Observations, International Workshop on Modern Optimization and Applications, Beijing, China, June 2016 (PDF)
  • T.K.R., Separation, Inverse Optimization, and Decomposition: Some Observations, International Workshop on Column Generation 2016, Buzios, Brazil, May 2016 (PDF)
  • T.K.R., S. DeNegre, M. Guzelsoy, and A. Hassanzadeh, and S. Tahernejad Multistage Discrete Optimization (Tutorial, Part I), INFORMS Optimization Society Conference, Princeton, NJ, March 2016
  • S. Bolusani, T.K.R., M. Guzelsoy, and A. Mahajan, Bilevel Optimization and the SYMPHONY MILP Solver (Tutorial, Part II), INFORMS Optimization Society Conference, Princeton, NJ, March 2016
  • S. Tahernejad, T.K.R., and S. DeNegre The MibS Solver for Bilevel Integer Optimization Problems (Tutorial, Part III), INFORMS Optimization Society Conference, Princeton, NJ, March 2016
  • T.K.R., S. DeNegre, M. Guzelsoy, and A. Hassanzadeh, and S. Tahernejad Multistage Discrete Optimization (Plenary), First International Workshop on Bilevel Programming, Monterrey, Mexico, March 2016 (PDF)
  • T.K.R., S. DeNegre, M. Guzelsoy, and A. Hassanzadeh, and S. Tahernejad Computational Experience with Algorithms for Solving Multistage Integer Programs, Aussois Workshop on Combinatorial Optimization, Aussois, France, January 2016 (PDF)

2015

  • T.K.R., Open Source Tools for Optimization in Python, SciPy India, IIT Bombay, Mumbai, India, December 2015 (PDF)
  • S. Tahernejad and T.K.R., Branch-and-cut Algorithm for Integer Bilevel Linear Optimization Problems, INFORMS Annual Meeting, Philadelphia, November, 2015.
  • A. Bulut and T.K.R., Computational Approaches to Mixed Integer Second Order Cone Optimization, INFORMS Annual Meeting, Philadelphia, November, 2015.
  • S. Bolusani and T.K.R., Solving Bilevel Linear Optimization Problems in Parallel, INFORMS Annual Meeting, Philadelphia, November, 2015.
  • T.K.R., M. Guzelsoy, and A. Hassanzadeh, Computational Experience with a Benders Algorithm for Two-stage Stochastic Integer Programming, INFORMS Annual Meeting, Philadelphia, November, 2015 (PDF).
  • T.K.R., Big Data Analytics: The Hype and the Hope, Mountain Talk Webinar given to Lehigh Alumni Association, October, 2015 (PDF)
  • T.K.R., S. Tahernejad, S. DeNegre, M. Guzelsoy, and A. Hassanzadeh, Bilevel Integer Optimization: Theory and Algorithms, International Symposium on Mathematical Programming 2015, Pittsburgh, PA, July 2015
  • A. Bulut and T.K. Ralphs, Computational Approaches to Mixed Integer Second Order Cone Optimization, International Symposium on Mathematical Programming 2015, Pittsburgh, PA, July 2015
  • M.J. Saltzman and T.K. Ralphs, COIN-OR at 15: Open Source Tools for Operations Research, International Symposium on Mathematical Programming 2015, Pittsburgh, PA, July 2015
  • A. Hassanzadeh, T.K.R., and M. Guzelsoy, A Benders’ Algorithm for Two-stage Stochastic Optimization Problems with Mixed Integer Programs, INFORMS Computing Society Biennial Meeting, Richmond, VA, January 2015 (PDF)
  • J. Wang and T.K.R., Recent Progress on the DIP Decomposition-based MILP Solver, INFORMS Computing Society Biennial Meeting, Richmond, VA, January 2015 (PDF)

2014

  • T.K.R. and A. Bulut, Optimization, Separation, and the Complexity of Inverse Optimization, INFORMS Annual Meeting, San Francisco, CA, November 2014 (PDF)
  • A. Bulut and T.K.R., Valid Inequalities for Mixed Integer Second Order Cone Optimization, INFORMS Annual Meeting, San Francisco, CA, November 2014
  • T.K.R., Accessible Analytics: Openness and Operations Research (Keynote Address), South African Operational Research Society Conference 2014, Parys, South Africa, September 2014 (PDF)
  • T.K.R., M. Galati, M. O’Sullivan, and J. Wang, DIP and DipPy: A Decomposition-based Modeling System and Solver, International Federation of Operations Research Societies Triennial Conference, Barcelona, Spain, July 2014 (PDF)
  • T.K.R., M. Guzelsoy, and A. Hassanzadeh, Generation and Representation of Piecewise Polyhedral Value Functions, MINLP 2014, Carnegie Mellon University, Pittsburgh, PA, June 2014 (PDF)
  • T. Terlaky, J. Goez, S. Cay, T.K.R., P. Belotti, and I. Polik, Mixed-integer second-order conic optimization: Disjunctive conic cuts and portfolio models, MINLP 2014, Carnegie Mellon University, Pittsburgh, PA, June 2014.
  • T.K.R., A. Bulut, S. DeNegre, M. Guzelsoy, A. Hassanzadeh, Multistage Integer Programming: Algorithms and Complexity, University of Houston, March 2014 (PDF)

2013

  • T.K.R., A. Bulut, S. DeNegre, M. Guzelsoy, A. Hassanzadeh, Multilevel and Multistage Integer Programming: Algorithms and Complexity, Oakland University, November 2013 (PDF)
  • T.K.R., A. Bulut, S. DeNegre, M. Guzelsoy, A. Hassanzadeh, Multilevel and Multistage Integer Programming: Algorithms and Complexity, University of Florida, October 2013.
  • A. Bulut and T.K.R., On the Complexity and Solution of Inverse Mixed Integer Linear Programs, INFORMS Annual Meeting, Minneapolis, MN, October 2013 (PDF)
  • A. Hassanzadeh, T.K.R., and M. Guzelsoy, A Generalized Benders’ Algorithm for Two-stage Stochastic Mixed Integer Linear Programs, INFORMS Annual Meeting, Minneapolis, MN, October 2013 (PDF)
  • T.K.R., J. Wang, M. Galati, and M. O’Sullivan, DIP and DipPy: A Decomposition-based Modeling System and Solver, INFORMS Annual Meeting, Minneapolis, MN, October 2013 (PDF)
  • T.K.R., A. Bulut, A. Lodi, and G. Woeginger, Multilevel and Multistage Integer Programming: Complexity and Algorithms, INFORMS Annual Meeting, Minneapolis, MN, October 2013 (PDF)
  • A. Hassanzadeh, T.K. Ralphs, and M. Guzelsoy, An Algorithm for Solving Two-stage Stochastic Programs with Mixed Integer Recourse, International Conference on Stochastic Programming, Bergamo, IT, July 2013.
  • T.K.R., A. Bulut, S. DeNegre, M. Guzelsoy, and A. Hassanzadeh The Complexity of Search: What We Can Learn from Games, CPAIOR 2013, IBM T.J. Watson Research Center, May 2013 (PDF)
  • T.K.R. and J. Wang Computational Experience with Hypergraph-based Methods for Automatic Decomposition in Integer Programming, CPAIOR 2013, IBM T.J. Watson Research Center, May 2013 (PDF)
  • T.K.R. An Introduction to the COIN-OR Optimization Suite: Open Source Tools for Building and Solving Optimization Models, Optimization Days, Montreal, May 2013 (PDF)
  • T.K.R., A. Bulut, S. DeNegre, M. Guzelsoy, A. Hassanzadeh, Multilevel Integer Programming, The Polynomial Time Hierarchy, and Parallel Computing, Penn State University, March 2013 (PDF)
  • J.C. Góez, P. Belotti, I. Polik, T.K.R., and T. Terlaky, Disjunctive Conic Cuts, INFORMS Computing Society Biannual Meeting, Santa Fe, NM, January 2013 (PDF).
  • T.K.R., et. al., Decomposition Methods for Discrete Optimization (Invited Tutorial), INFORMS Computing Society Biannual Meeting, Santa Fe, NM, January 2013 (PDF).
  • A. Bulut and T.K.R., Inverse Integer Programming: Complexity and Algorithms, INFORMS Computing Society Biannual Meeting, Santa Fe, NM, January 2013 (PDF).
  • A. Hassanzadeh, T.K.R., and M. Guzelsoy, A Value Function Approach for Solving Two-stage Stochastic Programs with Mixed Integer Recourse, INFORMS Computing Society Biannual Meeting, Santa Fe, NM, January 2013 (PDF).
  • T.K.R., A. Bulut, M. O’Sullivan, O. Ozaltin, and B. Hunsaker, GiMPy and GrUMPy: Visualization for Optimization in Python, INFORMS Computing Society Biannual Meeting, Santa Fe, NM, January 2013 (PDF).

2012

  • J.C. Góez, P. Belotti, I. Polik, T.K.R., and T. Terlaky, Branch and Bound for Mixed Integer Second Order Cone Optimization: Impact of Disjunctive Conic Cuts, INFORMS Annual Conference, Phoenix, AZ, November 2012.
  • T.K.R., M.V. Galati, and J. Wang, DIP and DIPPy: Towards a Generic, Decomposition-based MIP Solver, INFORMS Annual Conference, Phoenix, AZ, October 2012 (PDF).
  • T.K.R. and S. Yildiz, Some Experiments on Branching with General Disjunctions, INFORMS Annual Conference, Phoenix, AZ, October 2012 (PDF).
  • A. Bulut and T.K.R., An Algorithm for Solving Inverse Integer Programs, INFORMS Annual Conference, Phoenix, AZ, October 2012 (PDF).
  • A. Hassanzadeh, T.K.R., and M. Guzelsoy, An Algorithm for Solving Two-stage Stochastic Programs with Mixed Integer Recourse, INFORMS Annual Conference, Phoenix, AZ, October 2012 (PDF).
  • T.K.R., T. Koch, and Y. Shinano, Could we Use a Million Cores to Solve a Single Integer Program?, INFORMS Annual Conference, Phoenix, AZ, October 2012 (PDF).
  • T.K.R., A. Bulut, M. O’Sullivan, O. Ozaltin, and B. Hunsaker, GiMPy and GrUMPy: Visualization for Optimization in Python, INFORMS Annual Conference, Phoenix, AZ, October 2012.
  • T.K.R., A. Bulut, A. Lodi, F. Rossi, S. Smriglio, and G. Woeginger, Complexity and Multilevel Optimization, University of Kyoto, Kyoto, Japan, September 2012.
  • T.K.R., A. Bulut, A. Lodi, F. Rossi, S. Smriglio, and G. Woeginger, Complexity and Multilevel Optimization, Chuo University, Tokyo, Japan, September 2012.
  • T.K.R., M.V. Galati, and J. Wang, Computational Experience with Generic Decomposition using the DIP framework, RAMP Symposium, Tokyo, Japan, September 2012.
  • T.K.R., M.V. Galati, and J. Wang, Generic Decomposition-based Solution Methods, International Symposium on Mathematical Programming, Berlin, Germany, August 2012 (PDF).
  • T.K.R., A. Bulut, A. Lodi, F. Rossi, S. Smriglio, and G. Woeginger, Complexity and Multilevel Optimization, Mixed Integer Programming Workshop, UC Davis, July 2012 (PDF).

2011

  • T.K.R., M. Galati, and J. Wang, DIP with CHiPPS: Decomposition in Integer Linear Programming, CSIRO, Melbourne, Australia, December 2011 (PDF).
  • T.K.R. Making Molehills out of Mountains: A Guided Tour of Discrete Optimization, CSIRO, Melbourne, Australia, December 2011 (PDF).
  • T.K.R. and Y. Xu, Computational Approaches to Solving Integer Programs in Parallel, INFORMS Annual Conference, Charlotte, NC, November 2011 (PDF).
  • T.K.R., S. DeNegre, and M. Guzelsoy, Computational Experience Solving Bilevel Programs, INFORMS Annual Conference, Charlotte, NC, November 2011 (PDF).
  • J.C. Góez, P. Belotti, I. Polik, T.K.R., and T. Terlaky, Generating the Convex Hull of Disjunctions in Mixed Integer Second Order Cone Optimization, INFORMS Annual Conference, Charlotte, NC, November 2011.
  • G. Gamrath et al., MIPLIB 2010, INFORMS Annual Conference, Charlotte, NC, November 2011.
  • T.K.R., M. Galati, and J. Wang, DIP with CHiPPS: Decomposition in Integer Linear Programming, University of Michigan, Ann Arbor, MI, November 2011 (PDF).
  • T.K.R. and M. Galati, DIP with CHiPPS: Decomposition in Integer Linear Programming, ExxonMobil Research, Annandale, NJ, October 2011 (PDF).
  • J.C. Góez, P. Belotti, I. Polik, T.K.R., and T. Terlaky, Generating the Convex Hull of a Disjunction for Mixed Integer Second Order Cone Optimization, MOPTA, Bethlehem, PA, August 2011.
  • T.K.R. and Y. Xu, Computational Approaches to Solving Integer Programs in Parallel, SIAM Conference on Optimization, Darmstadt, Germany, May 2011 (PDF).
  • T.K.R., S. DeNegre, and M. Guzelsoy, Bilevel Integer Linear Programming, University of Edinburgh, Edinburgh, UK, May 2011 (PDF).
  • T.K.R., M. Galati, and Y. Xu, DIP with CHiPPS: Decomposition in Integer Linear Programming, Cornell University, Ithaca, NY, March 2011 (PDF).
  • T.K.R., S. DeNegre, and M. Guzelsoy, Bilevel Integer Linear Programming, Northwestern University, Chicago, IL, January 2011 (PDF).

2010

  • T.K.R., COIN-OR: Revving Up the Engine, INFORMS Annual Conference, Austin, TX, November 2010 (PDF).
  • T.K.R., A. Lodi, F. Rossi, and S. Smriglio, Interdiction Branching, INFORMS Annual Conference, Austin, TX, November 2010 (PDF).
  • M. Galati and T.K.R., Progress Update on COIN/DIP – Decomposition for Integer Programming, INFORMS Annual Conference, Austin, TX, November 2010.
  • A. Mahajan and T.K.R., Selecting Disjunctions for Solving MILPs, INFORMS Annual Conference, Austin, TX, November 2010.
  • S. DeNegre and T.K.R., Sensor Placement in Water Networks: An Interdiction Model, INFORMS Annual Conference, Austin, TX, November 2010.
  • J.C. Góez, P. Belotti, I. Polik, T.K.R., and T. Terlaky, Disjunctive Conic Cuts for Mixed Integer Second Order Cone Optimization, INFORMS Annual Conference, Austin, TX, November 2010.
  • T.K.R., S. DeNegre, M. Guzelsoy, A. Lodi, F. Rossi, and S. Smriglio, Bilevel Integer Programming, University of Pittsburgh, Pittsburgh, PA, October 2010 (PDF).
  • J.C. Góez, P. Belotti, I. Polik, T.K.R., and T. Terlaky, Disjunctive Conic Cuts for Second Order Cone Optimization, MOPTA, Bethlehem, PA, August 2010.
  • T.K.R., Benchmarking and Performance Analysis of Optimization Software, CPAIOR 2010, Bologna, Italy, June 2010 (PDF).
  • T.K.R. and Y. Xu, The COIN-OR High-Performance Parallel Search Framework, CPAIOR 2010, Bologna, Italy, June 2010 (PDF).
  • T.K.R. and M. Galati, DIP with ChiPPS: Decomposition Methods for Integer Linear Programming, University of Bordeaux, Bordeaux, France, June 2010 (PDF).
  • T.K.R. and M. Galati, DIP with ChiPPS: Decomposition Methods for Integer Linear Programming, University of Edinburgh, Edinburgh, Scotland, June 2010.
  • T.K.R., Introduction to COIN-OR Tools for Optimization, COR@L Seminar, Lehigh University, January 2010 (PDF).
  • T.K.R., S. DeNegre, M. Guzelsoy, A. Lodi, F. Rossi, and S. Smriglio, Bilevel Integer Linear Programming, Workshop on Combinatorial Optimization, Aussois, France, January 2010 (PDF).
  • A. Lodi, T.K.R., F. Rossi, and S. Smriglio, Interdiction Branching, Workshop on Combinatorial Optimization, Aussois, France, January 2010.

2009

  • T.K.R., Y. Xu, L. Ladanyi, and M.Saltzman, Implementing Custom Applications with CHiPPS, INFORMS Annual Conference, San Diego, October 2009 (PDF).
  • T.K.R., Y. Xu, L. Ladanyi, and M.Saltzman, Computational Experience with Parallel Integer Programming using the CHiPPS Framework, INFORMS Annual Conference, San Diego, October 2009 (PDF).
  • M. Guzelsoy, T.K.R. On the Value Function of a Mixed Integer Linear Program, INFORMS Annual Conference, San Diego, October 2009 (PDF).
  • S. DeNegre, T.K.R. Branch and Cut for Mixed Integer Bilevel Linear Programs, INFORMS Annual Conference, San Diego, October 2009 (PDF).
  • M. Galati and T.K.R., A Framework for Decomposition in Integer Programming, INFORMS Annual Conference, San Diego, October 2009 (PDF).
  • T.K.R., Introduction to COIN-OR Tools for Optimization, Combinatorial Optimization at Work, ZIB, Berlin, September 2009 (PDF).
  • A. Mahajan and T.K.R., To Branch or To Cut, International Symposium on Mathematical Programming, Chicago, August 2009 (PDF).
  • T.K.R., A. Lodi, F. Rossi, and S. Smriglio, Bilevel Branching, International Symposium on Mathematical Programming, Chicago, August 2009 (PDF).
  • T.K.R., S. DeNegre, and E. Suet Tse, A Bilevel Integer Nonlinear Programming Model for Cross-layer Network Design Optimization, International Symposium on Mathematical Programming, Chicago, August 2009 (PDF).
  • M. Galati and T.K.R., A Framework for Decomposition in Integer Programming, International Symposium on Mathematical Programming, Chicago, August 2009 (PDF).
  • T.K.R. and S. Denegre, Bilevel Integer Linear Programming, MOPTA 2009, Bethlehem, PA, August 2009 (PDF).
  • T.K.R. and M. Galati, A Framework for Decomposition in Integer Programming, University of Newcastle, Newcastle, NSW, Australia, June 2009 (PDF).
  • T.K.R., Y. Xu, L. Ladanyi, and M.Saltzman, Doing it in Parallel (DIP) with the COIN-OR High Performance Parallel Search Framework (CHiPPS), University of Newcastle, Newcastle, NSW, Australia, May 2009 (PDF).
  • A. Mahajan and T.K.R., In Search of Optimal Disjunctions in Mixed Integer Programming, University of Newcastle, Newcastle, NSW, Australia, May 2009 (PDF).
  • T.K.R. and S. Denegre, Bilevel Integer Linear Programming, University of Newcastle, Newcastle, NSW, Australia, May 2009 (PDF).
  • T.K.R. and M. Guzelsoy, Duality in Mixed Integer Linear Programming, University of Newcastle, Newcastle, NSW, Australia, May 2009 (PDF).
  • T.K.R. and M. Guzelsoy, Duality in Mixed Integer Linear Programming, Monash University, Melbourne, VIC, Australia, April 2009.
  • T.K.R. and S. Denegre, Bilevel Integer Linear Programming, University of Melbourne, VIC, Australia, April 2009.
  • A. Mahajan and T.K.R., In Search of Optimal Disjunctions in Mixed Integer Programming, Monash University, Melbourne, VIC, Australia, April 2009.
  • T.K.R. and M. Galati, A Framework for Decomposition in Integer Programming, Monash University, Melbourne, VIC, Australia, March 2009.
  • T.K.R., Y. Xu, L. Ladanyi, and M. Saltzman, Doing it in Parallel (DIP) with the COIN-OR High Performance Parallel Search Framework (CHiPPS), Monash University, Melbourne, VIC, Australia, March 2009.
  • T.K.R. and M. Guzelsoy, Duality in Mixed Integer Linear Programming, University of Canterbury, Christchurch, New Zealand, February 2009.
  • T.K.R., Introduction to COIN-OR: Open Source Software for Optimization, University of Canterbury, Christchurch, New Zealand, February 2009 (PDF).
  • T.K.R. and M. Guzelsoy, On the Value Function of a General Mixed Integer Linear Program, Victoria University of Wellington, New Zealand, January 2009.
  • T.K.R. and S. Denegre, Bilevel Integer Linear Programming, Victoria University of Wellington, New Zealand, January 2009.
  • T.K.R. and S. Denegre, Bilevel Integer Linear Programming, University of Auckland, New Zealand, January 2009.

2008

  • A. Mahajan and T.K.R., In Search of Optimal Disjunctions in Mixed Integer Programming, Argonne National Labs, Chicago, IL, December 2008 (PDF).
  • T.K.R. and S. Denegre, Bilevel Integer Linear Programming, Université Bordeaux, France, December 2008 (PDF).
  • T.K.R., Short Course in Bilevel Programming, Università di Bologna, Italy, December 2008.
  • T.K.R. and S. Denegre, Bilevel Integer Linear Programming, Politecnico di Milano, November 2008.
  • T.K.R., Optimization and Combinatorial Auctions, Institute for Advanced Studies, Università di Bologna, Italy, November 2008.
  • S. Denegre and T.K.R., A Mixed Integer Bilevel Programming Solver, INFORMS Annual Meeting, Washington, D.C., October, 2008.
  • Y. Xu, T.K.R., L. Ladanyi, and M.J. Saltzman, Developing Applications Based on CHiPPS, INFORMS Annual Meeting, Washington, D.C., October, 2008.
  • S. Denegre and T.K.R., Mixed Integer Interdiction, INFORMS Annual Meeting, Washington, D.C., October, 2008.
  • A. Mahajan and T.K.R., On Branching on General Hyperplanes for Mixed Integer Programming, INFORMS Annual Meeting, Washington, D.C., October, 2008.
  • M. Guzelsoy, A. Mahajan, and T.K.R., The SYMPHONY MIP Solver, INFORMS Annual Meeting, Washington, D.C., October, 2008.
  • M. Guzelsoy and T.K.R., Warm Starting for Mixed Integer Linear Programming, INFORMS Annual Meeting, Washington, D.C., October, 2008.
  • T.K.R. and S. Denegre, Bilevel Integer Linear Programming, Università degli Studi dell’Aquila, Italy, September 2008.
  • T.K.R. and M. Guzelsoy, On the Value Function of a General Mixed Integer Linear Program, XXXIX Annual Conference of Italian Operational Research Society, Ischia, Italy, September, 2008 (PDF).
  • Z. Akca, R. Berger, T.K.R., Optimizing Location, Routing, and Scheduling Decisions Under Capacity Restrictions, Column Generation 2008, Aussois, France, June 2008.
  • M. Galati, T.K.R., A Framework for Decomposition in Integer Programming, Column Generation 2008, Aussois, France, June 2008 (PDF).
  • T.K.R., Y. Xu, L. Ladanyi, and M.Saltzman, Doing it in Parallel (DIP) with the COIN-OR High Performance Parallel Search Framework (CHiPPS), Graduate Research Seminar, Pennsylvania State University, April, 2008 (PDF).
  • Y. Xu, T.K.R., M.J. Saltzman, and L. Ladányi, The CHiPPS Framework for Parallel Tree Search and Integer Programming, INFORMS Optimization Society Conference, Atlanta, GA, March, 2008.
  • M. Galati, T.K.R., DECOMP: A Framework for Decomposition in Integer Programming, INFORMS Optimization Society Conference, Atlanta, GA, March, 2008.
  • T.K.R. and M. Guzelsoy, The Value Function of a Mixed Integer Program with a Single Constraint, INFORMS Optimization Society Conference, Atlanta, GA, March, 2008 (PDF).
  • T.K.R. and M. Guzelsoy, The Value Function of a Mixed Integer Program with a Single Constraint, COPTA Seminar, University of Wisconsin-Madison, February, 2008 (PDF).

2007

  • Y. Xu, T.K.R., M.J. Saltzman, and L. Ladányi, A Framework for Implementing Parallel Tree Search Algorithms, INFORMS Annual Conference, Seattle, WA, November, 2007.
  • M. Galati and T.K.R., DECOMP: A Framework for Decomposition in Integer Programming, INFORMS Annual Conference, Seattle, WA, November, 2007.
  • O. Osaltyn, B. Hunsaker, and T.K.R., Estimating Solution Time of Branch-and-bound Algorithm, INFORMS Annual Conference, Seattle, WA, November, 2007.
  • B. Hunsaker, O. Osaltyn, and T.K.R., Visualization Tools for Branch-and-bound Algorithms, INFORMS Annual Conference, Seattle, WA, November, 2007 (a href=”/~ted/files/talks/visualization.pdf”>PDF)
  • Z. Akca, R. Berger, and T.K.R., Solving Integrated Location, Routing and Scheduling Problems, INFORMS Annual Conference, Seattle, WA, November, 2007.
  • S. DeNegre and T.K.R., Solution Approaches for Integer Bilevel Programs, INFORMS Annual Conference, Seattle, WA, November, 2007.
  • Y. Xu, T.K.R., M.J. Saltzman, and L. Ladányi, The Design and Implementation of BLIS, INFORMS Annual Conference, Seattle, WA, November, 2007.
  • M. Guzelsoy and T.K.R., The SYMPHONY Callable Library, INFORMS Annual Conference, Seattle, WA, November, 2007.
  • M. Guzelsoy and T.K.R., The Value Function of a Mixed-integer Linear Program with a Single Constraint, INFORMS Annual Conference, Seattle, WA, November, 2007.
  • T.K.R. and M. Guzelsoy, Warm Starting for Mixed Integer Linear Programs, INFORMS Annual Conference, Seattle, WA, November, 2007 (PDF).
  • S. DeNegre and T.K.R., Integer Bilevel Linear Programming: A Novel Branch-and-Cut Algorithm, INFORMS International Conference, Puerto Rico, July, 2007.
  • B. Hunsaker, O. Osaltyn, and T.K.R., Visualization Tools for Branch-and-Bound, The Tenth INFORMS Computing Society Conference, Miami, FL, January, 2007.

2006

  • T.K.R., M. Guzelsoy, J.T. Linderoth, M.J. Saltzman, and M. Wiecek, Using Cyberinfrastructure Tools to Solve Biobjective Integer Programs, INFORMS Annual Conference, Pittsburgh, PA, November 2006 (PDF).
  • M.J. Saltzman, L. Ladányi, and T.K.R., The COIN-OR Open Solver Interface: Inside a Portable Solver API, INFORMS Annual Conference, Pittsburgh, PA, November 2006.
  • K. Martin, JP Fasano, and T.K.R., Source Code Not Required: Using the COIN-OR Binaries, INFORMS Annual Conference, Pittsburgh, PA, November 2006.
  • M.V. Galati and T.K.R., DECOMP: A Framework for Decomposition in Integer Programming, INFORMS Annual Conference, Pittsburgh, PA, November 2006.
  • Y. Xu, T.K.R., L. Ladányi, and M.J. Saltzman, A Library Hierarchy for Implementing Scalable Parallel Search Algorithms, INFORMS Annual Conference, Pittsburgh, PA, November 2006.
  • S. DeNegre and T.K.R., Multiobjective Mixed-Integer Stackelberg Games, The International Symposium on Mathematical Programming, Rio de Janeiro, Brazil, August 2006.
  • T.K.R., Y. Xu, M.J. Saltzman, and L. Ladányi, Parallel Integer Programming with ALPS, The International Symposium on Mathematical Programming, Rio de Janeiro, Brazil, August 2006 (PDF).
  • T.K.R., The SYMPHONY Framework for Mixed-Integer Linear Programming: Basic Features, DIMACS Workshop on COIN-OR, Rutgers University, July 2006 (PDF).
  • T.K.R., The SYMPHONY Framework for Mixed-Integer Linear Programming: Advanced Features, DIMACS Workshop on COIN-OR, Rutgers University, July 2006 (PDF).
  • T.K.R. and S. DeNegre, Multiobjective Mixed-Integer Stackelberg Games, EURO XXI, Reykjavic, Iceland, June 2006 (PDF).
  • M.J. Saltzman, Y. Xu, T.K.R., and L. Ladányi, A Library Hierarchy for Implementing Scalable Parallel Search Algorithms, EURO XXI, Reykjavic, Iceland, June 2006.
  • T.K.R., M. Saltzman, and M. Galati, Using COIN-OR to Solve the Uncapacitated Facility Location Problem, EURO XXI, Reykjavic, Iceland, June 2006 (PDF).
  • T.K.R., M. Guzelsoy, J.T. Linderoth, M.J. Saltzman, and M. Wiecek, Biobjective Integer Programming, MIP 2006: Workshop on Mixed-Integer Programming, University of Miami, June 2006 (PS PDF).
  • T.K.R., M. Guzelsoy, J.T. Linderoth, M.J. Saltzman, and M. Wiecek, Biobjective Integer Programming, SAS Institute , June 2006. (PS PDF).

2005

  • T.K.R. and M. Guzelsoy, The SYMPHONY Callable Library, INFORMS Annual Conference, San Francisco, CA, November 2005 (PS PDF).
  • Y. Xu, T.K.R., L. Ladányi, and M.J. Saltzman, A Library Hierarchy for Implementing Scalable Parallel Search Algorithms, INFORMS Annual Conference, San Francisco, CA, November 2005 (PS PDF).
  • M.V. Galati and T.K.R., DECOMP: A Framework for Decomposition and Dynamic Cut Generation in Integer Programming, INFORMS Annual Conference, San Francisco, CA, November 2005.
  • T.K.R. and A. Pilatin, Parallel Solution of Vehicle Routing Problems, INFORMS Annual Conference, San Francisco, CA, November 2005 (PS PDF).
  • T.K.R., M. Guzelsoy, M. Saltzman, and M. Wiecek, Bioobjective Integer Programming, Rutgers University, Department of Industrial and Systems Engineering, Piscataway, NJ, October 2005 (PS PDF).
  • T.K.R. and M. Guzelsoy, Duality, Sensitivity Analysis, and Warm Starting, SAS Institute , August 2005. (PS PDF).
  • T.K.R., Making Molehills out of Mountains: A Guided Tour of Large-scale Discrete Optimization, Mathematics Department Colloquium, April 2005. (PS PDF).
  • T.K.R., Capacitated Vehicle Routing and Some Related Problems, Computer Science and Engineering Seminar Series, March 2005. (PS PDF).
  • Y. Xu, T.K.R., L. Ladányi, and M.J. Saltzman, ALPS: A Framework for Implementing Parallel Tree Search Algorithms, Fourth International Workshop of the EURO Working Group on Parallel Processing in Operations Research, Mont Tremblant, Canada, January 2005.
  • T.K.R. and M. Guzelsoy, A Mini-Tutorial on the SYMPHONY Callable Library for Mixed-Integer Linear Programming, The Ninth INFORMS Computing Society Conference, Annapolis, MD, January 2005 (PS PDF).
  • T.K.R. and M. Guzelsoy, The SYMPHONY Callable Library for Mixed-Integer Linear Programming, The Ninth INFORMS Computing Society Conference, Annapolis, MD, January 2005 (PS PDF).
  • M.V. Galati and T.K.R., DECOMP: A Framework for Decomposition and Dynamic Cut Generation in Integer Programming, The Ninth INFORMS Computing Society Conference, Annapolis, MD, January 2005.
  • Y. Xu, T.K.R., L. Ladányi, and M.J. Saltzman, ALPS: A Framework for Implementing Parallel Tree Search Algorithms, The Ninth INFORMS Computing Society Conference, Annapolis, MD, January 2005.

2004

2003

2002

2001

2000

Pre-2000

  • T.K.R., W. Pulleyblank, and L.E. Trotter Jr., A New Generic Separation Algorithm and Its Application to the Vehicle Routing Problem The Institute for Operations Research and Management Science Annual Conference, Philadelphia, PA, November 1999 (PS PDF).
  • T.K.R., W. Pulleyblank, and L.E. Trotter Jr., A New Generic Separation Algorithm for Combinatorial Optimization, IBM T.J. Watson Research Center, Yorktown Heights, NY, November 1999 (PS PDF).
  • T.K.R. and L. Ladányi, Computational Experience with Generic Parallel Branch and Cut, The Institute for Operations Research and Management Science Annual Conference, Seattle, WA, October 1998 (PS PDF).
  • T.K.R., W. Pulleyblank, and L. Trotter Jr., Parallel Branch and Cut for Vehicle Routing, The International Symposium on Mathematical Programming ’97, Lausanne, Switzerland, August 1997.
  • M. Eso, L. Ladányi, T.K.R., and L.E. Trotter Jr., Fully Parallel Generic Branch-and-Cut Framework, The 8th SIAM Conference on Parallel Processing for Scientific Computing, Minneapolis, MN, March 1997.
  • T.K.R., Polyhedral Aspects of the Mixed Postman Problem, Cornell Computational Optimization Project Colloquium, Ithaca, NY, February 1994.
  • T.K.R. and L. Ladányi, Computational Experience with a New Heuristic for the Crew Scheduling Problem, Cornell Computational Optimization Project Colloquium, Ithaca, NY, October 1993.

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