This page is not updated often enough, so some of the links are no longer functional.

Useful general resources

• Michael Trick's Operations Research Page, now maintained by INFORMS. A great collection of Operations Research information.
• Optimization Online, a repository of eprints about optimization and related topics.
• Mathematical Programming Glossary. Includes a list of myths and counterexamples in mathematical programming.
• The NEOS Server is a project to make the latest techniques in optimization widely available. You can submit a problem in an appropriate framework, and request that a particular algorithm be used to solve the problem. This is a service of the Optimization Technology Center at Argonne National Lab. It includes interactive formulations of the diet problem and the portfolio optimization problem.
• INFORMS maintains searchable databases of abstracts of talks at the semiannual meetings and recent publications.
• The SIAM Activity Group on Optimization has a nice collection of pointers for people interested in optimization.
• Linear Programming FAQ
• Nonlinear Programming FAQ
• COIN-OR, the open source initiative for the OR community.
• IFORS, including a dissertation directory.
• A decision tree of optimization software
• Opt-Net home page. (Here is the old address.)
• tutOR, a collection of OR learning modules.
• WORMS
• The CHANCE Database Welcome Page
• The WWW library for Statistics
• Netlib at UTK/ORNL.
• Documentation of the performance of various computers, due to Jack Dongarra
• Stochastic Programming Community homepage, including tutorial chapters on various aspects of stochastic programming.
• Myron Hlynka's Queueing Homepage.
• Operations Research techniques in radiation oncology.
• RIOT: Baseball Playoff Races. This site uses linear programming to determine when a baseball team is eliminated from contention.

Conferences

• Abstracts of talks at INFORMS conferences
• The NETLIB Conferences database
• DIMACS Workshops. RPI is a DIMACS affiliate member, so the registration fees for most of these workshops are waived for attendees from RPI.

• INFORMS 2010 Austin, Texas, November 7-10.
• MOPTA, Lehigh University, Bethlehem, PA, August 18-20, 2010.
• ICCOPT, Santiago, Chile, July 26-29, 2010.
• Waterloo Engineering Optimization Day, March 31, 2010.

• INFORMS Annual Meeting, San Diego, October 11-14, 2009.
• 20th International Symposium on Mathematical Programming, Chicago, August 23-28, 2009.
• CORS-INFORMS International Meeting, Toronto, June 14-17, 2009.
• MIP 2009, University of California at Berkeley, June 8-11, 2009.

• Mixed Integer Nonlinear Optimization: Algorithmic Advances and Applications, IMA, University of Minnesota, November 17-21, 2008.
• INFORMS 2008, October 12-15, Washington.
• MOPTA 2008, University of Guelph, August 18-20, 2008.
• MIP 2008, Columbia University, August 4-7, 2008.
• SIAM Conference on Optimization, Boston, Massachusetts, May 10-13, 2008.
• INFORMS Optimization Society 2008 Conference, March 14 - March 16, 2008, Atlanta.

• INFORMS Annual Meeting, November 4-7, Seattle, Washington.
• ICCOPT II and MOPTA-07, August 13-16, McMaster University, Hamilton, Ontario, Canada.
• IPCO 2007, June 25-27, Cornell University, Ithaca, New York.
• C&O@40 Conference, Conference on Combinatorics and Optimization, June 18-23, University of Waterloo, Ontario, Canada.

• ISMP 2006, Rio de Janeiro, Brazil, July 30 to August 4, 2006.
• EURO 2006 in Reykjavik, Iceland, July 2-5, 2006.

• Columbia Optimization Day, December 5, 2005.
• IFORS, Hawaii, July 11-15, 2005.
• Workshop on Optimization in Finance, Coimbra, Portugal, July 5-8, 2005.
• FoCM Optimization Workshop, Santander, Spain, July 4-6, 2005.
• 8th International Symposium on Generalized Convexity and Generalized Monotonicity, Varese, Italy, July 4-8, 2005
• IPCO XI, Berlin, June 8-10, 2005.
• Eighth SIAM Conference on Optimization, Stockholm, May 15-18, 2005.
• Optimization Days 2005, Montreal, May 9-11, 2005.
• Conference on Systems Analysis, Data Mining and Optimization in Biomedicine, University of Florida, February 2-4, 2005.

• The Vescprem Optimization Conference: Advanced Algorithms (VOCAL), December 13-15, 2004, Veszprem, Hungary.
• 4th COLUMBIA OPTIMIZATION DAY , New York, November 15, 2004.
• Tenth International Conference on Stochastic Programming , Tucson, Arizona, October 11-15, 2004.
• MAO 2004, the 10th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, Albany, NY, Aug 30 - Sep 1, 2004.
• XIII Panamerican Conference of Transportation, Albany, NY Sep 26-29, 2004.
• OR 2004, Symposium on Operations Research, Tilburg University, September 1-3, 2004.
• First Mathematical Programming Society International Conference on Continuous Optimization, ICCOPT I, will be held at RPI, August 2-4 2004, with a summer school on July 31 and August 1, 2004.
• MOPTA 2004, McMaster University, Hamilton, Canada, July 28-30, 2004.
• HPOPT 2004, CWI, Amsterdam, The Netherlands, June 23-25, 2004.
• APMOD 2004, Brunel University, June 20-23, 2004.
• IPCO, Columbia University, June 9-11, 2004.
• Workshop on Large Scale Nonlinear and Semidefinite Programming, University of Waterloo, May 12-15, 2004.
• V BRAZILIAN WORKSHOP ON CONTINUOUS OPTIMIZATION, In honor of the 60th birthday of Clóvis Caesar Gonzaga, UFSC - Florianópolis, March 22 - 25, 2004.
• Multiscale optimization methods and applications, February 26-28, 2004, University of Florida.
• HICSS, January 5-8, 2004.
• 2004 NSF Design, Service and Manufacturing Grantees and Research Conference, Dallas, January 5-8, 2004.
• AMS Short Course: Trends in Optimization, January 5-6, 2004, Phoenix, preceding the Joint Mathematics Meeting.

• Columbia Optimization Day, November 3, 2003.
• DIMACS Workshop on Data Mining Techniques in Bioinformatics, October 30-31, 2003.
• INFORMS Atlanta 2003, October 19-22, 2003.
• ISMP 2003, the international symposium on mathematical programming, Copenhagen, 18-22 August 2003.
• MOPTA 2003, McMaster University, Hamilton, Canada, July 30 - August 1, 2003.
• Discussions on mixed integer programming, June 25-26, 2003, Columbia University.
• Semidefinite programming and robust optimization, IMA Workshop, Minneapolis, March 12-19, 2003. Part of the year on optimization.

• Conferences in 2002.
• Conferences in 2001.
• Conferences in 2000.
• Conferences in 1999.
• Conferences in 1998.
• Conferences in 1997.
• Conferences in 1996.

Test cases for various types of problems

• Netlib at UTK/ORNL has test cases for many problems, including linear programming problems.
• MIPLIB, a collection of mixed integer programming data sets.
• OR-Library, a collection of test data sets for a variety of problems. Maintained by John Beasley.
• COPS, a collection of large-scale nonlinearly Constrained Optimization ProblemS.
• SDPLIB, a collection of semidefinite programming problems, maintained by Brian Borchers.
• TSPLIB, a collection of TSP instances.
• LOLIB, a collection of linear ordering test instances. I also have a collection of random linear ordering instances.
• QAPLIB, the Quadratic Assignment Problem library homepage.
• Multicommodity network flow problems.
• UCI Repository Of Machine Learning Databases and Domain Theories (These are clustering problems.)

Interior point methods

• Interior-Point Archive. Initially set up by Steve Wright.
• The semidefinite programming homepages maintained by Christoph Helmberg and Farid Alizadeh.
• SDPLIB, a collection of semidefinite programming problems, maintained by Brian Borchers.
• The DIMACS Challenge on SDP.

Integer programming

• OR-Library, a collection of test data sets for a variety of problems. Maintained by John Beasley.
• MIPLIB, a collection of mixed integer programming data sets.
• TSPLIB, a collection of TSP instances.
• LOLIB, a collection of linear ordering test instances. I also have a collection of random linear ordering instances.
• DIMACS Challenge on Cliques, Coloring, and Satisfiability
• The semidefinite programming homepages maintained by Christof Helmberg and Farid Alizadeh.
• QAPLIB, the Quadratic Assignment Problem library homepage.
• ABACUS, a branch-and-cut system now distributed under a GNU licence.
• UCI Repository Of Machine Learning Databases and Domain Theories (These are clustering problems.)
• Network on metaheuristic procedures, HEUR.
• Memetic algorithms, a metaheuristic for combinatorial optimization problems.
• Ant Colony Optimization, generally used for combinatorial optimization problems.
• An on-line optimization system for MILPs (for small examples!)
• An online bibtex file (150K) of an annotated bibliography for post-solution analysis in mixed integer programming and combinatorial optimization, and an associated paper in postscript (353K) and pdf (351K) formats, maintained by Harvey Greenberg.
• A set of benchmark instances for various classes of graph problems.

Computational logic

• SATLIB - the satisfiability library.
• SAT competitions.
• DIMACS Challenge on Cliques, Coloring, and Satisfiability
• John Franco's homepage
• Jun Gu's homepage. You can ftp his papers.
• John Hooker's homepage
• Peter Barth's homepage
• Ken McAloon and Carol Tretkoff
• Fang's Fuzzy Theory Resources

Transportation

• CRT at Montreal
• IRO at Montreal, including Eric Taillard
• CASTLE Lab at Princeton, set up by Warren Powell of Civil&OR at Princeton

Software packages

• The NEOS Server is a project to make the latest techniques in optimization widely available. You can submit a problem in an appropriate framework, and request that a particular algorithm be used to solve the problem. This is a service of the Optimization Technology Center at Argonne National Lab. It includes interactive formulations of the diet problem and the portfolio optimization problem.
• AMPL.
• COIN-OR, the open source initiative for the OR community.
• Here is a list of software packages.
• CPLEX Optimization, Inc. Home Page
• XPRESS-MP, a package for linear programs and integer programs. The interior point solver for linear programming problems uses a homogeneous method.
• MOSEK, a homogenized interior point method package for use with Windows operating systems. Written by Erling Andersen.
• YALMIP, a MATLAB toolbox "initially focused on semi-definite programming, but the latest release extends this scope significantly".
• ABACUS, a branch-and-cut system now distributed under a GNU licence.
• LINDO
• KETRON
• ACCPM and HOPDM, from Jacek Gondzio. HOPDM is a public domain interior point code for linear and quadratic programs that is comparable in performance with commercial codes. ACCPM is an implementation of an interior point cutting plane algorithm.
• PCx, another very good public domain interior point code for linear programming problems, written by Sanjay Mehrotra at Northwestern, Steve Wright, and Joe Czycyk at Argonne, and others.
• LOQO, Bob Vanderbei's interior point solver.
• LIPSOL, a MATLAB interior point LP code written by Yin Zhang.
• CSDP, a public domain package for solving semidefinite programming problems, written in C by Brian Borchers.
• DSDP, Steve Benson and Yinyu Ye's code for solving MAXCUT and similar problems using a dual semidefinite programming approach.
• SDPT3, an SDP package written in MATLAB, by K.C. Toh, Mike Todd, and Reha Tutuncu.
• SeDuMi, an SDP package originally developed by Jos Sturm.
• Biq-Mac, a Binary quadratic and Max cut Solver.
• MatView, a sparse matrix viewer.
• OSL, the IBM package.
• BARON, for concave minimization over polyhedra.
• MINOPT, a package for mixed integer nonlinear programming by Christodoulos Floudas et al.
• PORTA, a polyhedral representation algorithm. If you provide the algorithm with an integer programming problem, it will return a list of all the extreme points and information about the facets. Also available from the same site is SMAPO, a library of linear descriptions of polytopes of small instances of various integer programming problems.
• MCF, a C implementation of a network simplex solver. Available free of charge for academic use.
• RELAX, a FORTRAN code for minimum cost flow problems by Dimitri Bertsekas and Paul Tseng.
• METIS, a freely distributed package for graph partitioning by George Karypis.
• CHACO, for partitioning and ordering graphs, free for academic use with a research licence.
• DONLP2, an SQP code.
• Software Visualization, including XTANGO, a program for visualizing the progress of an algorithm.
• National HPCC Software Exchange
• ADIFOR, also available at this site. For more information about automatic differentiation, see this page
• ADMIT, an automatic differentiation package from Tom Coleman.
• COOOL, a set of object oriented optimization codes written in C++.
• I also have an unorganized list of announcements of computational packages that are available for solving a variety of problems.

Global optimization

• Global optimization homepage
• Another global optimization homepage
• Comparison of global solvers.

Various networks and pointers to pointers.

• eLib Entry Point at ZIB-Berlin
• NA-Net , Numerical Analysis net.
• IM-Net, Industrial Mathematics net.
• A collection of computer science bibliographies.
• A list of mathematics sites.
• A decision tree of optimization software
• Math-Net Links to the Mathematical World
• Center for Research on Parallel Computing at Rice University

Some personal homepages, and some universities and corporations with pointers to homepages for various researchers

• Kartik Krishnan.
• Kristin Bennett
• Jong-Shi Pang
• Brian Borchers, integer programming, computational logic.
• Jon Lee, integer programming.
• Yinyu Ye
• Kurt Anstreicher
• Jean-Louis Goffin.
• Mohammad Oskoorouchi.
• Anil Kamath home page
• Combinatorics and Optimization at Waterloo, including Levent Tuncel and Henry Wolkowicz
• McMaster University department of Computing and Software, including Tamas Terlaky.
• AT&T Research (includes Mauricio Resende, among others).
• TU Delft Department of Technical Mathematics and Informatics (includes Kees Roos and Etienne de Klerk, among others).
• Tokyo Institute of Technology, Department of Information Science. (Includes M. Kojima). There is an ftp site for papers and software.
• Computer Science and Discrete Optimization group at Heidelberg, including Gerhard Reinelt.
• Michael Juenger's group at the University of Cologne.
• OR at Cornell, including Mike Todd, ...
• OR at Stanford, including Walter Murray, Michael Saunders, ..., and Stephen Boyd in the electrical engineering department/information systems laboratory.
• Rice University, including David Applegate, Bob Bixby, Bill Cook, John Dennis, Richard Tapia, and Yin Zhang.
• OR at Georgia Tech, including Renato Monteiro and Eva Lee,...
• IEOR at Columbia.
• Operations Research at MIT, including Rob Freund, Michel Goemans, Pablo Parrilo,...
• Courant at NYU, including Michael Overton, Joel Spencer. and Margaret Wright.
• Computer Science at Wisconsin, including Michael Ferris, Steve Wright, and Olvi Mangasarian.
• Industrial and Systems Engineering at the University of Florida, including Panos Pardalos.
• RUTCOR, including Farid Alizadeh, Jonathan Eckstein,...
• Industrial and Operations Engineering at Michigan, including John Birge and Romesh Saigal.
• Logilab at the University of Geneva, including Jean-Philippe Vial.
• OR at Princeton, including Bob Vanderbei.
• Econometric Institute at Erasmus University, Rotterdam, including Shuzhong Zhang, and Arjan Berkelaar.
• Jos Sturm, in Tilburg.
• Shuzhong Zhang at the Chinese University of Hong Kong.
• Christoph Helmberg at Chemnitz University of Technology.
• Sven Leyffer at Argonne.
• Stefan Scholtes at the Judge Institute of Management, Cambridge University.
• Management Science at the University of Miami, including Anuj Mehrotra.
• CIRL, University of Oregon (includes Matt Ginsberg).
• Chris Jones, including pointers to work in graphical visualization of algorithms.
• Computing and Applied Mathematics Laboratory, NIST.
• NASA Langley Optimization Group
• Management at Odense University, including Erling Andersen.
• Bob Bosch at Oberlin College. Bob uses integer programming and dominoes to create portraits.

Professional organizations

• The Mathematical Programming Society
• SIAM
• INFORMS
• SIAM Activity Group on Optimization

NSF, ONR, and funding information

• SMARTS
• National Science Foundation
• NSF Custom News Service.
• ONR
• ONR OR page
• AFOSR
• Grant information

Journals and Publishers

• Tables of contents for various journals, a list of pointers put together by Brian Borchers.
• Akademie Verlag, Berlin
• Baltzer Science, the publishers of the Annals of OR.
• Elsevier Science
• Kluwer
• O'Reilly
• PWS Computer Science
• Springer
• John Wiley

• SIAM
• INFORMS
• OR/MS Today
• Linear and Nonlinear Programming, a book by Stephen Nash and Ariela Sofer.

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