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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. 

See all archives

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

2a. Conic Constraints

2b. Complementarity Conditions

3a. Discrete Models

3b. Discrete Solver Support

4a. Solver Interfaces

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.