Talks and Slides Archive 2010-2014
Welcome to our extensive archives of all talks and slide presentations AMPL has provided from 2010-2014. Explore the listings below. Click on the links to find PDFs and web pages with all the information from the event.
INFORMS Annual Meeting
9-12 November 2014 – San Francisco, California, U.S.A.
AMPL booth in the exhibit area
Session SC56: Software Demonstrations, Sunday, November 9, 13:30-15:00:
Robert Fourer, Victor Zverovich, Building AMPL Models into Your Applications
Session MB08: Celebrating the Contributions of George Dantzig, Monday, November 10, 11:00-12:30:
Robert Fourer, The Origins of a Practical Simplex Method
Session MC46: Advances in MIP Modeling Systems, Monday, November 10, 13:30-15:00:
Robert Fourer, David M. Gay, Victor Zverovich, Conveying Logical Conditions to MIP Solvers through an Algebraic Modeling Language
OR2014
2-5 September 2014 – Aachen, Germany
AMPL sponsorship of this event
AMPL booth in the exhibit area
Session TA-21: Optimization Modeling II, Thursday, September 4, 8:15-9:45:
Robert Fourer, Alternatives for Programming in Conjunction with an Algebraic Modeling Language for Optimization
11th Mixed Integer Programming Workshop
21-24 July 2014 – Columbus, Ohio, U.S.A.
AMPL sponsorship of this event
IFORS 2014: 20th Conference of the International Federation of Operational Research Societies
13-18 July 2014 – Barcelona, Spain
AMPL booth in the exhibit area
SIAM Conference on Optimization
19-22 May 2014 – San Diego, California, U.S.A.
AMPL sponsorship of this event
AMPL table in the exhibit area
APMOD 2014: International Conference on Applied Mathematical Optimization and Modelling
9-11 April 2014 – Coventry, U.K.
AMPL sponsorship of this event
Bob Fourer of AMPL Optimization is a member of the Program Committee and is organizing sessions on Optimization Modeling Languages and Software
2014 INFORMS Conference on Business Analytics & Operations Research
30 March-1 April 2014 – Boston, Massachusetts, U.S.A.
AMPL booth in the exhibit area
Session MD11: Software Tutorials, Monday, March 31, 13:50-14:40
Robert Fourer, New AMPL Interfaces for Enhanced Development and Deployment of Optimization Models
6th INFORMS Optimization Society Conference
6-8 March 2014 – Houston, Texas, U.S.A.
AMPL sponsorship of this event
AMPL table in the exhibit area
Session TA-01: Large-Scale Problems, Thursday, March 6, 9:00-10:30
Robert Fourer, Strategies for “Not Linear” Optimization
Informs Annual Meeting, Minneapolis,
6-9 October 2013 – Minnesota, U.S.A.
AMPL booth in the exhibit area
Session MC29: Software Demonstrations, Monday, October 7, 13:30-15:00
Robert Fourer,
New AMPL Interfaces for Enhanced Development and Deployment of Optimization Models
Session TD08: Constraint Programming III, Tuesday, October 8, 16:30-18:00
Victor Zverovich,
New Features of the AMPL Constraint Programming Interfaces
CP 2013: 19th International Conference on Principles and Practice of Constraint Programming
16-20 September 2013 – Uppsala, Sweden
AMPL sponsorship of this event
Workshop on CP Solvers: Modeling, Applications, Integration, and Standardization, Monday, September 16, 15:00-15:25
Victor Zverovich,
Constraint Programming in AMPL
OR 2013: International Conference of the German and Dutch OR Societies
3-6 September 2013 – Rotterdam, The Netherlands
AMPL booth in the exhibit area
AMPL sponsorship of this event
4th International Conference on Continuous Optimization
29 July – 1 August 2013 – Caparica, Portugal
Session Thu.A.23: Extending the Power and Expressiveness of Optimization
Modeling Languages, Thursday, August 1, 9:00-10:30
Robert Fourer,
Convex Quadratic Programming in AMPL
13th International Conference on Stochastic Programming
8-12 July 2013 – Bergamo, Italy
Solvers for Stochastic Optimization, Wednesday, July 10, 10:45-12:50
Victor Zverovich, Gautam Mitra, Csaba I. Fábián,
A Solver for Problems with Second-Order Stochastic Dominance Constraints
Computational SP Including Risk Management and Energy Applications, Thursday, July 11, 14:00-16:25
Gautam Mitra, Victor Zverovich, Christian Valente,
Formulation and Solver Support for Optimisation under Uncertainty
EURO-INFORMS Joint International Meeting
1-4 July 2013 – Rome, Italy
AMPL booth in the exhibit area
Session TB56: Optimization Modeling I, Tuesday, July 2, 10:30-12:00
Robert Fourer,
New Interface Developments in the AMPL Modeling Language & System
Session WB9: Sponsor Presentations, Wednesday, July 3, 10:30-12:00
Robert Fourer,
AMPL Models for Not-Linear Optimization Using Linear Solvers
CPAIOR 2013: 10th International Conference on Integration of Artificial Intelligence and Operations Research Techniques in Constraint Programming,
18-22 May 2013 – Yorktown Heights, New York, U.S.A.
Late Breaking Abstracts, Wednesday, May 22, 16:00-17:00
Victor Zverovich,
Connecting Constraint Programming Solvers to AMPL
INFORMS Conference on Business Analytics & Operations Research
7-9 April 2013 – San Antonio, Texas, U.S.A.
AMPL booth in the exhibit area
Track 11: Software Tutorials, Monday, April 8, 13:50-14:40
Robert Fourer,
New and Forthcoming Developments in the AMPL Modeling Language and System
13th INFORMS Computing Society Conference
6-8 January 2013 – Santa Fe, New Mexico, U.S.A.
AMPL sponsorship of this event
Conference theme: Modeling and Analytics for the Real World
Bob Fourer of AMPL Optimization is the stream chair for
Modeling Languages and Systems.
Optimization Modeling: Alternative Interfaces, Sunday, January 6, 16:30-18:00
Session SC3: Victor Zverovich and Robert Fourer,
The AMPL Interface to Constraint Programming Solvers
Optimization Modeling: Algebraic Languages, Tuesday, January 8, 16:30-18:00
Session TC3: David M. Gay,
AMPL Implementation Techniques
“Logic” and Constraint Programming Extensions
22 October 2012: The AMPL language has been extended in a variety of ways to take better advantage of constraint programming and mixed-integer programming solvers that deal directly with “logic” in constraints of various kinds. Among these extensions are basic logical operators (and, or, not, exists, forall), conditional operators (if ... then ..., ==>), counting operators (count, atleast, atmost), and operators that facilitate so-called global constraints (alldiff, numberof).
Many of the extended operators are recognized by a new AMPL driver for the ILOG Concert Technology C++ interface to the IBM ILOG CP constraint programming optimizer and also the IBM CPLEX mixed-integer programming optimizer. This driver is available to all registered CPLEX for AMPL users including academic and trial license users.
See our new logic extensions page for a syntax and usage summary of all of the extended operators recognized by the new ilogcp driver.
Free Extended Function Library
22 October 2012: A new, free function library extends AMPL with over 300 functions chosen from the GNU Scientific Library. Included are scientific, statistical, and utility functions of many kinds, and a variety of random number generators.
Once installed and declared, these functions may be applied to any arguments anywhere in an AMPL model or script. When applied to variables in objectives or constraints, they are sent to solvers, which automatically gain access to them. Thus solvers that rely on function evaluations can optimize over expressions that use this library.
Xpress for AMPL Now Available
15 October 2012: FICO Xpress version 23 for linear, mixed integer, and quadratic programming is now available for purchase with an AMPL interface, directly from AMPL Optimization. A complete, updated Xpress option listing details settings for access to all of the Xpress solver features. With this addition, we now offer a choice among all of the best MIP optimizers; free trials are available for benchmarking.
INFORMS Annual Meeting
14-17 October 2012 – Phoenix, Arizona, U.S.A.
AMPL booth in the exhibit area
Bob Fourer of AMPL Optimization has organized 3 sessions on Advances in Optimization Modeling Languages and Systems
Session SA15: Software Tutorials, Sunday, October 14, 8:00-9:30
Robert Fourer,
Specifying “Logical” Conditions in AMPL Optimization Models
Session SD72: Advances in Optimization Modeling Languages and Systems I, Sunday, October 14, 16:30-18:00
Jared Erickson and Robert Fourer,
Automated Conversion of Common Optimization Problem Structures to Mixed-Integer Linear Programs
OR 2012: International Annual Conference of the German Operations Research Society
4-7 September 2012 – Hannover, Germany
AMPL booth in the exhibit area
Invited Talk, to be scheduled
Robert Fourer,
Alternatives for Scripting in Conjunction with an Algebraic Modeling Language for Optimization
AMPL Book Chapters Now Free Online
28 August 2012: We are pleased to announce that chapters of “AMPL: A Modeling Language for Mathematical Programming” are now freely available for download. This offering became possible through a recent agreement with the book’s publisher, who will continue to make hardbound books available for purchase.
21st International Symposium on Mathematical Programming
19-24 August 2012 – Berlin, Germany
AMPL booth in the exhibit area
Bob Fourer of AMPL Optimization has organized 3 sessions on Modeling Languages and Software
Modeling Languages and Software I, Thursday, August 23, 10:30-12:00
Robert Fourer,
Strategies for Using Algebraic Modeling Languages to Formulate Second-Order Cone Programs
6th International Conference on Automatic Differentiation,
23-27 July 2012 – Fort Collins, Colorado, U.S.A.
Poster Presentation 5
David M. Gay,
Bounds from Slopes
25th European Conference on Operational Research
8-11 July 2012 – Vilnius, Lithuania
AMPL booth in the exhibit area
Session WD-33: Optimization Modeling II, Wednesday, July 11, 14:30-16:00
Robert Fourer,
Alternatives for Scripting in Conjunction with an Algebraic Modeling Language for Optimization
INFORMS International Conference
24-27 June 2012 – Beijing, China
AMPL booth in the exhibit area
AMPL sponsorship of this event
Session TB20: Software Tutorials, Tuesday, June 26, 11:00-12:30
Robert Fourer,
Alternatives for Scripting in the AMPL Modeling Language
Victor Zverovich Joins AMPL Optimization
1 June 2012: AMPL Optimization is pleased to welcome Victor Zverovich as the newest member of the AMPL team. Victor’s skills will play a key role in the development of the next generation of AMPL products.
Victor is a specialist in mathematical optimization. In 2011 he completed his PhD in Mathematics at Brunel University, UK. His main research interests are stochastic programming and algebraic modeling languages. During and after his PhD Victor worked at OptiRisk Systems on a stochastic programming solver, stochastic extensions to AMPL and an integrated development environment for those extensions. Victor has a first class honors degree in Mathematics from Belarusian State University and many years of software development experience.
Gurobi 5.0 for AMPL Now Available
15 May 2012: Gurobi version 5.0 for linear, mixed integer, and quadratic programming is now available for purchase with an AMPL interface, both directly through us and from Gurobi Optimization. This version adds support for quadratic constraints and a variety of performance enhancements. Accounts that are up-to-date on Gurobi for AMPL maintenance and support service can download this major update immediately; other should contact licensing@ampl.com for information.
CPLEX 12.4 for AMPL Now Available
15 May 2012: IBM ILOG CPLEX version 12.4 for linear, mixed integer, and quadratic programming is now available for purchase with an AMPL interface, directly from AMPL Optimization. Accounts that are up-to-date on CPLEX for AMPL maintenance and support service can download this significant update immediately; other should contact licensing@ampl.com for information.
INFORMS Conference on Business Analytics & Operations Research
April 15-17, 2012 – Huntington Beach, California, U.S.A.
AMPL booth in the exhibit area
Track 22: Software Tutorials, Tuesday, April 17, 10:30-11:20
Robert Fourer,
New and Forthcoming Developments in the AMPL Modeling Language and System
APMOD 2012: International Conference on Applied Mathematical Optimization and Modelling
March 28-30, 2012 – Paderborn, Germany
AMPL sponsorship of this event
4th INFORMS Optimization Society Conference
February 24-26, 2012 – Coral Gables, Florida
AMPL sponsorship of this event
Session SB01: Software for Optimization Modeling, Saturday, February 25, 10:30-12:00
Robert Fourer,
Alternatives for Scripting in the AMPL Modeling Language
Gurobi Optimizer Solutions Seminar
2 December 2011 – Tokyo, Japan
Invited presentation, Friday, December 2, 13:20-14:35
Robert Fourer,
Using AMPL with Gurobi to Apply Optimization Models Efficiently and Reliably
International Symposium on Mathematics of Logistics: Theory and Practice
29-30 November 2011 – Tokyo, Japan
Invited presentation, Tuesday, November 29, 11:00-12:00
Robert Fourer,
Using a Modeling Language for Efficient and Reliable Optimization in Logistics and Related Applications
INFORMS Annual Meeting
13-16 November 2011 – Charlotte, North Carolina, U.S.A.
AMPL booth in the exhibit area
Session SB03: Optimization Software, Sunday, November 13, 11:00-12:30
Robert Fourer, Jared Erickson,
Strategies for Using Algebraic Modeling Languages to Formulate Second-Order Cone Programs
Session TC10: Software Demonstrations, Tuesday, November 15, 13:30-15:00
Robert Fourer,
AMPL Models for “Not Linear” Optimization Using Linear Solvers
OR53: Annual Conference of the OR Society
6-8 September 2011 – Nottingham, United Kingdom
Track 11: Optimisation Keynote, Thursday, Sept 8, 14:00-15:00
Robert Fourer,
Convexity Detection in Large-Scale Optimization
Very Large Scale Optimization: A Conference in Honor of Etienne Loute
6 September 2011 – Brussels, Belgium
Invited presentation, Tuesday, September 6, 14:45-15:30
Robert Fourer,
Convexity Detection in Large-Scale Optimization
OR 2011: International Conference on Operations Research, sponsored by the German, Austrian, and Swiss OR societies
30 August – 2 September 2011 – Zurich, Switzerland
AMPL booth in the exhibit area
Session TC-22: Advances in Modeling Languages, Thursday, Sept 1, 11:30-13:00
Robert Fourer,
New and Forthcoming Developments in the AMPL Modeling Language and System
IFORS 2011: 19th Triennial Conference of the International Federation of Operational Research Societies
10-15 July 2011 – Melbourne, Australia
AMPL booth in the exhibit area
Session MC-7: OR Software, Monday, July 11, 16:15-17:45
Robert Fourer,
Attacking Hard Mixed-Integer Optimization Problems Using an Algebraic Modeling Language
CPLEX 12.3 for AMPL Now Available
12 June 2011: IBM ILOG CPLEX version 12.3 for linear, mixed integer, and quadratic programming is now available for purchase with an AMPL interface, directly from AMPL Optimization. Those who have purchased earlier versions from us can also arrange to download this update; contact licensing@ampl.com if you need to set up a download account.
CPAIOR 2011: 8th International Conference on Integration of Artificial Intelligence and Operations Research Techniques in Constraint Programming for Combinatorial Optimization
23-27 May 2011 – Berlin, Germany
AMPL sponsorship of this event
Bob Fourer of AMPL Optimization will be attending.
SIAM Conference on Optimization
16-19 May 2011 – Darmstadt, Germany
AMPL sponsorship and booth in the exhibit area
David Gay of AMPL Optimization will be attending.
Gurobi 4.5 for AMPL Now Available
15 April 2011: Gurobi version 4.5 for linear, mixed integer, and quadratic programming is now available for purchase with an AMPL interface, both directly through us and from Gurobi Optimization. Those who have purchased earlier versions from us can also arrange to download this update; contact licensing@ampl.com if you need to set up a download account.
INFORMS Conference on Business Analytics and Operations Research
10-12 April 2011 – Chicago, Illinois, U.S.A.
AMPL booth in the exhibit area
Workshop: Ziena Optimization, Sunday, April 10, 9:10-10:00
Robert Fourer and David M. Gay,
Using KNITRO for AMPL
Track 19: Software Tutorials, Tuesday, April 12, 12:45-13:10
Robert Fourer,
New and Forthcoming Developments in the AMPL Modeling Language and System
12th INFORMS Computing Society Conference,
9-11 January 2011 -Monterey, California, U.S.A.
Bob Fourer of AMPL Optimization will be attending.
CMIC-2011: Chiang Mai University Intl Conference,
4-7 January 2011 – Chiang Mai, Thailand
Workshop, Tuesday-Wednesday, January 4-5
Robert Fourer,
Modeling and Solving Nontraditional Optimization Problems
1a. Background
1b. Current Features
2b. Complementarity Conditions
3a. Discrete Models
4b. Solver Selection
Keynote presentation,
Robert Fourer,
Assigning People in Practice
85th GOR Working Group on Real World Optimization:
Modelling Languages in Mathematical Optimization, Bad
18-19 November 2010 – Honnef, Germany
Developer presentation, Friday, November 19, 09:15-10:15
Robert Fourer and David M. Gay,
Recent Developments in Model and Solver Support in the AMPL Modeling Language
INFORMS Annual Meeting
7-10 November 2010 – Austin, Texas, U.S.A.
AMPL booth in the exhibit area
INFORMS Roundtable: OR in the Cloud, Sunday, November 7
Robert Fourer,
Cloud Pioneers: NEOS and Optimization Services
Session SA18: Optimization Modeling, Sunday, November 7, 8:00-9:30
Barry King and Terri Friel,
Class Rostering at Roosevelt University using AMPL and LPsolve
Session SD48: Exhibitor Presentations, Sunday, November 7, 16:30-18:00
Robert Fourer and David M. Gay,
New and Forthcoming Developments in the AMPL Modeling Language and System
Session MC33: Algorithms & Solvers for SOCP & Stochastic SDP, Monday, November 8, 13:30-15:00
Jared Erickson and Robert Fourer,
Second-Order Cone Program (SOCP) Detection and Transformation Algorithms for Optimization Software
Session MD18: Modeling Languages II, Monday, November 8, 16:30-18:00
Robert Fourer and David M. Gay,
New Directions in Development of the AMPL Modeling Language and System
Session TC40: Solver Interface APIs I, Tuesday, November 9, 13:30-15:00
David M. Gay,
Overview of and Update on ASL, the AMPL/Solver Interface Library
KNITRO 7.0 for AMPL Now Available
13 October 2010: KNITRO version 7.0 for nonlinear optimization in continuous and integer variables is now available for purchase with an AMPL interface, both directly through us and from Ziena Optimization. Those who have purchased earlier versions from us can also arrange to download this update; contact licensing@ampl.com if you need to set up a download account.
What a Pivot: Workshop Honoring the 65th Birthday of Bob Bixby
26-28 September 2010 – Erlangen, Germany
Presentation, Monday, September 27
Robert Fourer,
Approaches to Near-Optimally Solving Mixed-Integer Programs
Full-Featured MIP Solvers Available Free for Academic Use
20 September 2010: The AMPL-enabled versions of two popular mixed-integer optimizers are now available free for teaching and research at degree-granting academic institutions. These are full-featured versions that impose no arbitrary limits on problem size.
Gurobi may be included as a no-cost item on any academic license order. Those who already have AMPL academic licenses can contact us to arrange to add Gurobi, or can download solver software and academic licenses free of charge from the Gurobi website; see our Gurobi download instructions for details.
CPLEX for AMPL can be obtained without charge through the IBM Academic Initiative; see our CPLEX download instructions for details.
Purchase CPLEX for AMPL Directly From Us
15 September 2010: CPLEX for linear, quadratic, and mixed-integer programming has joined the lineup of AMPL-enabled solvers available for purchase directly from AMPL Optimization LLC. Version 12.2 is currently shipping. Contact us at info@ampl.com for pricing on single-user, floating, and server licenses. Full-featured trials are also available.
OR 2010: German OR Society Annual International Conference
1-3 September 2010 – Munich, Germany
Semi-plenary presentation, Wednesday, September 1, 13:30-14:15
Robert Fourer,
Cyberinfrastructure and Optimization
SP XXI: 12th International Conference on Stochastic Programming
16-20 August 2010 – Halifax, Nova Scotia, Canada
AMPL table in the exhibit area
Session RB2: Solution Algorithms for Stochastic Programming,
Thursday, August 19, 10:00-11:40
Christian Valente,
Extensions to the SP Modelling System SPInE/SAMPL
Session RC4: Software and Modelling Tools for Stochastic Programming I,
Thursday, August 19, 13:20-15:00
David M. Gay,
Update on AMPL Extensions for Stochastic Programming
EURO XXIV: 24th European Conference on Operational Research
11-14 July 2010 – Lisbon, Portugal
AMPL booth in the exhibit area
Session MC21: Optimization Modeling I, Monday, July 12, 12:20-13:40
Robert Fourer and David M. Gay,
Attacking Hard Mixed-Integer Optimization Problems Through the AMPL Modeling Language
Andreas Grothey, Jacek Gondzio, Marco Colombo, Kristian Woodsend and Jonathan Hogg,
A Structure-Conveying Modelling Language for Mathematical and Stochastic Programming
Session TB21: Optimization Modeling V, Tuesday, July 13, 10:40-12:00
Alexandra Newman,
Efficient Mixed Integer Programming Formulations in Energy and Mining
Session WD35: Mixed-Integer Nonlinear Programming Problem-Specific Approaches, Wednesday, July 14, 14:00-15:20
David M. Gay,
On Bound Computations for MINLP
ALIO-INFORMS Joint International Meeting
6-9 June 2010 – Buenos Aires, Argentina
AMPL table in the exhibit area
Session TB08: Modeling Languages for Optimization, Tuesday, June 8, 11:30-13:00
Robert Fourer and David M. Gay,
Attacking Hard Mixed-Integer Optimization Problems Through the AMPL Modeling Language
Session WC08: OR in Practice III Modeling, Wednesday, June 9, 13:20-14:50
Robert Fourer,
Experimenting with Near-Optimal Integer Programming Formulations for Discrete Optimization Problems
INFORMS Conference on OR/MS Practice
18-20 April 2010 – Orlando, Florida, U.S.A.
AMPL booth in the exhibit area
Track T9: Software Tutorials, Monday, April 19, 15:40-16:30
Robert Fourer
Attacking Hard Mixed-Integer Optimization Problems Through the AMPL Modeling Language
Gurobi 3.0 for AMPL Now Available
15 April 2010: Gurobi version 3.0 for linear and mixed integer programming is now available for purchase with an AMPL interface, both directly through us and from Gurobi Optimization.