COR@L Seminar Series 2004-05


Introduction

Coral Seminar Series is a series of weekly seminars focussing on Optimization. These informal seminars are usually held on every Thursday 12:00-1:00pm in room Mo355. Anyone interested in a particular seminar or mathematical programming and optimization in general is welcome. Attendees are encouraged to bring their lunch. Important announcements and discussions about the seminar are made on the seminar mailing list, which is open to everyone for subscription. If you wish to contribute a talk on your own research in optimization send an email with a short description of your topic to Menal Guzelsoy.


Summer 2005

Following is a list of presentations done during the summer break, along with the slides and suggested readings.

Date:Thursdays, 07/14/2005, 07/28/2005, 08/04/2005, 08/11/2005
Speaker:Menal Guzelsoy, Ted Ralphs
Topic:IP Duality, sensitivity and parametric analysis [PDF]
Suggested Reading:
Diego Klabjan, A New Subadditive Approach to Integer Programming: Theory and Algorithms, In Proceedings of the Ninth Conference on Integer Programming and Combinatorial Optimization, Cambridge, MA, pages 384-400 [PDF]

L.A. Wolsey, Integer Programming Duality: Price Functions and Sensitivity Analaysis, Math Programming, 20.

And a lot more. ;-)





Date:Thursday, 07/14/2005
Speaker:Wasu Glankwamdee
Topic:An approximation algorithm for cover inequality separation; and Benchmarking optimization software. [PDF]
Suggested Reading:
Dolan E.D., More J.J., Benchmarking optimization software with performance profiles, Mathematical Programming, Series A, 91, 201-213, 2002. [PDF]





Date:Thursday, 07/07/2005
Speaker:Matthew Galati
Topic:Aggregation and Mixed Integer Rounding to solve MILPs [PDF]
Suggested Reading:
Marchand H., Wolsey L.A., Aggregation and Mixed Integer Rounding to Solve MIPs, CORE Discussion Paper, June 1998. [PDF]





Date:Thursday, 06/30/2005
Speaker:Scott Denegree
Topic:Sparse Simplex and LPs with Embedded Network Structure [PDF]
Suggested Reading:
Gulpinar N., Mitra G., Maros I., Creating Advanced Bases for Large Scale Linear Programs Exploiting Embedded Network Structure, Computational Optimization and Applications, 21(1), 71-93. [PDF]





Date:Thursday, 06/16/2005
Speaker:Ashutosh Mahajan
Topic:Inverting Basis in Simplex [PDF]
Suggested Reading:
Istvan Maros, Computational Techniques of the Simplex Method, Kluwer Academic Publishers, 2003.





Date:Thursday, 06/09/2005
Lead:Ted Ralphs
Topic:Hypersparsity in Revised Simplex Method
Suggested Reading:
J.A.J. Hall, K.I.M. McKinnon, Hyper-sparsity in the revised simplex method and how to exploit it, University of Edinburgh School of Mathematics October 2002. [Optimization-Online]



Date:Thursday, 06/02/2005
Speakers:Scott Denegree
Topic:Sparse Matrix Factorization
Suggested Reading:
Edward Rothberg, Anoop Gupta, Efficient sparse matrix factorization on high performance workstations\u2014exploiting the memory hierarchyl, ACM Transactions on Mathematical Software (TOMS), Volume 17, Issue 3, September 1991

J.W. Demmel, S.C. Eisenstat, J.R. Gilbert, X.S. Li, J.W.H. LiuA Supernodal Approach to Sparse Partial Pivoting, SIAM Journal on Matrix Analysis and Applications, Vol 20, No. 3, pp 720-755.



Date:Thursday, 05/26/2005
Speakers:Jim Ostrowski
Topic:Basic Linear Algebra: LU Decomposition



Date:Thursday, 05/19/2005
Speakers:Ashutosh Mahajan, Ali Pilatin
Topic:Pancakes: Half baked and burnt [PDF]
Suggested Reading:
W.H. Gates, C.H.Papadimitriou, Bounds for sorting by prefix reversal, Discrete Mathematics, 27, (1979).

M.H. Heydari, I.H. Sudborough, On the diameter of the pancake network, Journal of Algorithms, 25, 1997.




Date:Thursday, 05/12/2005
Speaker:Jeff Linderoth
Topic:Mixed Integer Non Linear Programming - II (Algorithms) [PDF]

Final version of presentation is available at COR@L Tutorials Page

Suggested Reading:
Grossmann, I.E., Review of Nonlinear Mixed-Integer and Disjunctive Programming Techniques, Optimization and Engineering, 3, 227-252 (2002). [PDF]

Stubbs R.A., Mehrotra S., A branch and cut method for 0-1 mixed convex programming, Mathematical Programming, vol 86, 1999.

Cezik M.T., Iyengar G., Cuts for mixed (0-1) Conic Programming, Mathmatical Programming, (to appear), 2005.



Date:Thursday, 05/05/2005
Speaker:Jeff Linderoth
Topic:Mixed Integer Non Linear Programming - I (Introduction) [PDF]
Suggested Reading:
Grossmann, I.E., Review of Nonlinear Mixed-Integer and Disjunctive Programming Techniques, Optimization and Engineering, 3, 227-252 (2002). [PDF]

Stubbs R.A., Mehrotra S., A branch and cut method for 0-1 mixed convex programming, Mathematical Programming, vol 86, 1999.

Cezik M.T., Iyengar G., Cuts for mixed (0-1) Conic Programming, Mathmatical Programming, (to appear), 2005.



Spring 2005 Presentations

Date:Thursday, 04/21/2005
Speaker:Kumar Abhishek
Topic:Approximation Algorithms [PDF]
Suggested Reading:
Vijay Vazirani, Approximation Algorithms, Springer-Verlag, 2001.



Date:Thursday, 04/14/2005
Speaker:Udom Janjarassuk
Topic:Stochastic Network Interdiction [PPT]
Suggested Reading:
Cormican K.J., Morton D.P., Wood R.K., Stochastic Network Interdiction , Operations Research, Vol. 46, No. 2, 1998. [PDF]



Date:Thursday, 04/08/2005
Speaker:Ashutosh Mahajan
Topic:Complexity - 101 [PDF]
Suggested Reading:
Christos H. Papadimitriou. Computational Complexity, Addison-Wesley, 1994, Chapters 1-3.



Date:Thursday, 03/24/2005
Speaker:Zeliha Akca, Ali Pilatin
Topic:Linearizing Mixed 0-1 Polynomial Expressions [PPT unavailable]
Note:
Based on the work of W.P. Adams and R.J. Forrester



Date:Thursday, 03/07/2005
Speaker:Scott DeNegree
Topic:Integer Programming Duality [PDF]
Suggested Reading:
Gomory, R.E., An algorithm for integer solutions to linear programs.In R.L. Graves and P.Wolfe, Recent Advances in Mathematical Programming, 269-302. McGraw-Hill New York, 1963

K. Klamroth, J. Tind, and S. Zust Integer Programming Duality in multiple objective programming. Journal of Global Optimization, 29, 1-18, 2004. [PDF]

G.L. Nemhuaser and L.A. Wolsey, Integer and Combinatorial Optimization. John Wiley and Sons, Inc, New York, 1999

Wolsey, L.A., Integer Programming Duality: Price Functions and sensitivity analysis. Mathematical Programming, 20, 173-195, 1981.



Date:Thursday, 03/03/2005
Speaker:Jerry Shen, Zeliha Akca
Topic:Sampling Methods in Stochastic Programming [PPT]
Suggested Reading:
A.Oven 1998. Monte Carlo Extension of Quasi-Monte Carlo. 1998 Winter Simulation Conference.

M.Koivu 2004. Variance Reduction in Sample Approximations of Stochastic Programs. Mathematical Programming.

J.Linderoth A.Shapiro and S.Wright. 2002.The Empirical Behavior of Sampling Methods for Stochastic Programming. Optimization technical report 02-01.

H.Niederreiter. 1992. Random Number Generation and Quasi-Monte Carlo Methods, volume 63 of CBMS-NSF Reginal Conference Series in Applied Mathematics.



Date:Thursday, 02/17/2005
Speaker:Menal Guzelsoy
Topic:Infeasibility in MIPs [PDF]
Suggested Reading:
Chinneck J.W. Analyzing Infeasible Optimization Models, A tutorial for CORS/INFORMS, 2004 [PDF]

Guieu O., Chinneck J.W. Analyzing Infeasible Mixed Integer and Integer Linear Programs, INFORMS Journal on Computing, vol 11, no. 1, pp 63-77, 1999.

Chinneck J.W. Finding a Useful Subset of Constraints for Analysis in an Infeasbile Linear Program, INFORMS Journal on Computing, vol. 9, no. 2, 1997.



Date:Thursday, 02/10/2005
Speaker:Ted Ralphs
Topic:Bicriteria Integer Programming [PS, PDF]
Suggested Reading:
T.K.Ralphs, M.J. Saltzman, and M.M. Wiecek, An Improved Algorithm for Biobjective Integer Programming, to appear in Annals of Operations Research [Working paper version:PS, PDF]




Fall 2004 Presentations


Topic: Subgradient and Sampling Algorithms for l1 Regression
Time:Thursday 11/11/04 12:00pm - 1:00pm
Place:Mohler Laboratory - Room 355
Speaker:Ken Clarkson (Bell Laboratories)




Topic: Duality, Warm Starting and Sensitivity Analysis for MILP
Authors:Ted Ralphs, Menal Guzelsoy
Time:Thursday 11/04/04 12:00pm - 1:00pm
Place:Mohler Laboratory - Room 355
Speaker:Ted Ralphs



October 24-27, INFORMS break!



Topic: A Set-Partitioning-Based Model and Solution Procedure for the SVRP
Authors:Rosemary Berger, Jeff Linderoth, Clara Novoa, Bob Storer
Time:Thursday 10/21/04 12:00pm - 1:00pm
Place:Mohler Laboratory - Room 355
Speaker:Rosemary Berger



Topic: An Overview of Dynamic Programming
Time:Thursday 10/14/04 12:00pm - 1:00pm
Place:Mohler Laboratory - Room 355
Speaker:Joseph C. Hartman



Topic: A Computational Experience with 2-Stage SIP Problems
Authors:Menal Guzelsoy, Ted Ralphs
Time:Thursday 10/07/04 12:00pm - 1:00pm
Place:Mohler Laboratory - Room 355
Speaker:Menal Guzelsoy



Topic:Discussion on Stochastic Integer Programming
Time:Tuesdays 09/16/04 - 09/30/04 12:00pm - 1:00pm
Place:Mohler Laboratory - Room 355
Lead:Jeff Linderoth

Suggested Readings:
R. Schultz. Stochastic Programming with Integer Variables. Mathematical Programming, Series {B},97:285-309, 2003.

A Tutorial by Shabbir Ahmed: Stochastic Programming .

Lewis Ntaimo, Suvrajeet Sen. The Million-Variable "March" for Stochastic Combinatorial Optimization.


Topic: A Gentle Introduction to Stochastic Programming
Time:Thursday 09/09/04 12:00pm - 1:00pm
Place:Mohler Laboratory - Room 355
Speaker:Jeff Linderoth



Topic: ---
Authors:Scott DeNegree, Ted Ralphs
Time:Thursday 09/02/04 12:00pm - 1:00pm
Place:Mohler Laboratory - Room 355
Speaker:Scott DeNegree


Archives Seminar Series 2003-2004


Last Updated: Sept 10, 2005