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The 24th Conference on Integer Programming and Combinatorial Optimization

Submission deadline: November 6, 2022, 23:59 (CET)
Notifications: January 20, 2023
IPCO Summer School: June 19-20, 2023
IPCO Conference: June 21-23, 2023

The 24th Conference on Integer Programming and Combinatorial Optimization (IPCO XXIV) will take place on June 21–23, 2023 at the University of Wisconsin-Madison, Madison (WI), USA. It will be organized by the Wisconsin Institute for Discovery.

The conference will be preceded by a Summer School (June 19-20).

The IPCO conference is under the auspices of the Mathematical Optimization Society and is held every year, except for those in which the International Symposium on Mathematical Programming takes place. The conference is a forum for researchers and practitioners working on various aspects of integer programming and combinatorial optimization. The aim is to present recent developments in theory, computation, and applications in these areas.

Call for Papers

Important Dates

Submission deadline: November 6, 2022, 23:59 (CET)
Notifications: January 20, 2023


The IPCO conference is a forum for researchers and practitioners working on various aspects of integer programming and combinatorial optimization. The aim is to present recent developments in theory, computation, and applications. The scope of IPCO is viewed in a broad sense, to include algorithmic and structural results in integer programming and combinatorial optimization as well as revealing computational studies and novel applications of discrete optimization to practical problems.

Authors are invited to submit extended abstracts of their recent work by November 6, 2022 (23:59 CET); see the submission guidelines below for more information. The Program Committee will select the papers to be presented on the basis of the submitted extended abstracts. Contributions are expected to be original, unpublished and not under review by journals or conferences with proceedings before the notification date (January 20, 2023). Papers violating these requirements will not be considered by the Program Committee.

During the conference, approximately 33 papers will be presented in single-track sessions. Each lecture will be 30 minutes long. The proceedings will be published as a volume of Springer Lecture Notes in Computer Science. They will contain extended abstracts of all accepted submissions. It is expected that revised and extended versions will subsequently be submitted for publication in appropriate journals.

Submission Guidelines and Instructions for Authors

The extended abstract – in Springer LNCS format – should not exceed 12 pages plus references. Please check the Springer Information for LNCS Authors for additional information. Appendices are allowed only if they fit within the 12 page limit. Submissions not following these guidelines will not be considered. It is allowed to put full versions of the submitted papers in an on-line repository.

The first page should contain the title, the authors’ names with their affiliations, and a short abstract. The introduction should be a broadly accessible exposition of the main ideas and techniques used to achieve the results, including motivation and a clear comparison with related work. In particular, the introduction should convey to the non-expert why the paper should be accepted to IPCO. Submitted extended abstracts will be reviewed according to the standards of top tier reviewed conferences. The main acceptance criteria used by the Program Committee are the quality and originality of the research, plus its interest to people working in the field. It is crucial that the importance of the work is understood by the committee. The claimed results must be correct and new.

A paper will not be considered in any of the following cases:

– It has already been published.
– It is under review by a journal or another conference with proceedings.
– It has a member of the Program Committee among its authors.
– It is submitted after the submission deadline.

It is not allowed to submit a paper that has been submitted to IPCO 2023 to a journal or a conference with proceedings before the IPCO 2023 notification date.

The submission server can be accessed here:

Best Paper Award

IPCO will present a Best Paper Award, to be chosen by the Program Committee.

Accepted Papers

  • Sabrina Bruckmeier, Christoph Hunkenschröder and Robert Weismantel
    Sparse Approximation Over the Cube
  • Yusuke Kobayashi
    Optimal General Factor Problem and Jump System Intersection
  • Jean Cardinal and Raphael Steiner
    Inapproximability of shortest paths on perfect matching polytopes
  • Da Wei Zheng and Monika Henzinger
    Multiplicative Auction Algorithm for Approximate Maximum Weight Bipartite Matching
  • Billy Jin, Nathan Klein and David Williamson
    A 4/3-Approximation Algorithm for Half-Integral Cycle Cut Instances of the TSP
  • Christina Büsing, Timo Gersing and Arie Koster
    Recycling Inequalities for Robust Combinatorial Optimization
  • Nicole Megow and Jens Schlöter
    Set Selection under Explorable Stochastic Uncertainty via Covering Techniques
  • Matthew Gerstbrein, Laura Sanità and Lucy Verberk
    Stabilization of Capacitated Matching Games
  • Martin Nägele, Christian Nöbel, Richard Santiago and Rico Zenklusen
    Advances on Strictly Δ-Modular IPs
  • Sander Borst, Daniel Dadush, Sophie Huiberts and Danish Kashaev
    A nearly optimal randomized algorithm for explorable heap selection
  • Michael Joswig, Max Klimm and Sylvain Spitz
    The Polyhedral Geometry of Truthful Auctions
  • Satoru Fujishige, Tomonari Kitahara and László Végh
    An Update-and-Stabilize Framework for the Minimum-Norm-Point Problem
  • Franziska Eberle, Anupam Gupta, Nicole Megow, Benjamin Moseley and Rudy Zhou
    Configuration Balancing for Stochastic Requests
  • Edin Husić, Zhuan Khye Koh, Georg Loho and László A. Végh
    On the Correlation Gap of Matroids
  • Christoph Hertrich and Leon Sering
    ReLU Neural Networks of Polynomial Size for Exact Maximum Flow Computation
  • Gonzalo Muñoz, Joseph Paat and Álinson S. Xavier
    Compressing Branch-and-Bound Trees
  • Oussama Hanguir, Will Ma and Christopher Thomas Ryan
    Designing Optimization Problems with Diverse Solutions
  • Ksenia Bestuzheva, Ambros Gleixner and Tobias Achterberg
    Efficient Separation of RLT Cuts for Implicit and Explicit Bilinear Products
  • Noah Weninger and Ricardo Fukasawa
    A Fast Combinatorial Algorithm for the Bilevel Knapsack Problem with Interdiction Constraints
  • Richard Santiago, Ivan Sergeev and Rico Zenklusen
    Constant-Competitiveness for Random Assignment Matroid Secretary Without Knowing the Matroid
  • Amitabh Basu, Hongyi Jiang, Phillip Kerger and Marco Molinaro
    Information complexity of mixed-integer convex optimization
  • Gonzalo Muñoz, David Salas and Anton Svensson
    Linear bilevel programming with uncertain lower-level costs
  • Eranda Çela, Bettina Klinz, Stefan Lendl, Gerhard Woeginger and Lasse Wulf
    A linear time algorithm for linearizing quadratic and higher-order shortest path problems
  • Jannik Matuschke
    Decomposition of Probability Marginals for Security Games in Abstract Networks
  • Daniel Dadush, Friedrich Eisenbrand and Thomas Rothvoss
    From approximate to exact integer programming
  • Sven Jäger, Guillaume Sagnol, Daniel Schmidt Genannt Waldschmidt and Philipp Warode
    Competitive Kill-and-Restart and Preemptive Strategies for Non-clairvoyant Scheduling
  • Daniel Dadush, Arthur Leonard, Lars Rohwedder and Jose Verschae
    Optimizing Low Dimensional Functions over the Integers
  • Pranav Nuti and Jan Vondrák
    Towards an Optimal Contention Resolution Scheme for Matchings
  • Anna Karlin, Nathan Klein and Shayan Oveis Gharan
    A Deterministic Better-than-3/2 Approximation Algorithm for Metric TSP
  • Gonzalo Muñoz, Joseph Paat and Felipe Serrano
    Towards a characterization of maximal quadratic-free sets
  • Joseph Poremba and F. Bruce Shepherd
    Cut-Sufficient Directed 2-Commodity Multiflow Topologies
  • Aleksandr M. Kazachkov and Egon Balas
    Monoidal Strengthening of V-Polyhedral Disjunctive Cuts
  • Antonia Chmiela, Gonzalo Muñoz and Felipe Serrano
    Monoidal strengthening and unique lifting in MIQCPs


Program Committee

  • Merve Bodur, University of Toronto
  • José Correa, Universidad de Chile
  • Alberto Del Pia, University of Wisconsin-Madison
  • Yuri Faenza, Columbia University
  • Volker Kaibel, OVGU Magdeburg (Chair)
  • Simge Küçükyavuz, Northwestern University
  • Andrea Lodi, Cornell Tech
  • Diego Moran, Universidad Adolfo Ibañez
  • Giacomo Nannicini, IBM Research
  • Britta Peis, RWTH Aachen
  • Mohit Singh, Georgia Tech
  • Martin Skutella, TU Berlin
  • Juan Pablo Vielma, Google
  • Jens Vygen, Universität Bonn
  • Stefan Weltge, TU München
  • Giacomo Zambelli, London School of Economics

Local Organization Committee

  • Styliana Avraamidou
  • Alberto Del Pia (Chair)
  • Jeff Linderoth
  • Jim Luedtke
  • Carla Michini

Summer School

The IPCO 2023 summer school will be held on June 19-20, 2023 in the Orchard View Room in the Discovery Building. The Discovery Building is located in 330 N. Orchard St., Madison, WI 53715 United States. Click here for directions.

Summer School Program

Monday (June 19) 8:30 Registration and coffee
9:00 Amitabh Basu (Lecture 1)
10:30 Coffee break
11:00 Fatma Kılınç-Karzan (Lecture 1)
12:30 Lunch break
14:00 Domenico Salvagnin (Lecture 1)
15:30 Coffee break
16:00 Problem session
17:00 End of day
Tuesday (June 20) 8:45 Coffee
9:00 Amitabh Basu (Lecture 2)
10:30 Coffee break
11:00 Fatma Kılınç-Karzan (Lecture 2)
12:30 Lunch break
14:00 Domenico Salvagnin (Lecture 2)
15:30 Coffee break
16:00 Problem session
17:00 End of day

See the “Local Information” page for suggested venues for lunch break.

Summer School Speakers

Amitabh Basu, Johns Hopkins University

Amitabh BasuAmitabh Basu is a professor in the Dept. of Applied Mathematics and Statistics at Johns Hopkins University. He received his Ph.D. from Carnegie Mellon University in 2010 and did postdoctoral work in the Dept. of Mathematics at the University of California, Davis from 2010-2013. His main research interests are in mathematical optimization and its applications, with an emphasis on problems with a combinatorial or discrete flavor. He serves on the editorial boards of Mathematics of Operations Research, Discrete Optimization, MOS-SIAM Series on Optimization, Mathematical Programming, and SIAM Journal on Optimization. His work has been recognized by the NSF Career award and the Egon Balas Prize from the INFORMS Optimization Society.

Fatma Kılınç-Karzan, Carnegie Mellon University

Fatma Kilinc-KarzanFatma Kılınç-Karzan is an Associate Professor of Operations Research at Tepper School of Business, Carnegie Mellon University. She also holds a courtesy appointment at the Department of Computer Science, and is affiliated with the Algorithms Combinatorics and Optimization (ACO) PhD Program as well. She completed her PhD in Industrial and Systems Engineering from Georgia Institute of Technology in 2011. Her research interests are on foundational theory and algorithms for convex optimization and structured nonconvex optimization, and their applications in optimization under uncertainty, machine learning and business analytics. Dr. Kılınç-Karzan is an associate editor for the journals Mathematical Programming A, Operations Research, INFORMS Journal on Computing, and Optimization Methods and Software and serves on the editorial board of MOS-SIAM book series on Optimization. She is also an elected member of Mathematical Optimization Society Council and has served as an elected member in the Board of Directors of INFORMS Computing Society (2021–2023). Her research is supported by NSF, ONR and AFOSR and has received the 2015 INFORMS Optimization Society Prize for Young Researchers, the 2014 INFORMS JFIG Best Paper Award, and an NSF CAREER Award in 2015.

Domenico Salvagnin, University of Padova

Domenico SalvagninDomenico Salvagnin received his degree in Computer Science Engineering (cum laude) at the University of Padova, Italy, in 2005, and his PhD degree in Computational Mathematics (Operations Research) at the University of Padova, Italy, in 2009. He is associate professor in Operations Research at DEI, University of Padova, Italy since 2018, and got the National Academic Qualification as full professor in 2018. He was lead development scientist in IBM ILOG CPLEX team in 2015-2017, and is currently scientific consultant for FICO XPRESS.
His research interests include theory and algorithms for linear and mixed integer linear programming, constraint programming, and hybrid methods for optimization. His awards include: winner of the 11th DIMACS Implementation Challenge for the best computer codes for Steiner Tree problems, Computational Optimization and Applications 2016 Best Paper Award, CPAIOR 2019 Distinguished Paper Award and ICAPS 2019 Best Paper Award.


The IPCO 2023 conference will be held on June 21-23, 2023 in the DeLuca Forum in the Discovery Building. The Discovery Building is located in 330 N. Orchard St., Madison, WI 53715 United States. Click here for directions.

Wednesday (June 21) 8:00 Registration and coffee
8:45 Opening remarks
9:00 3 talks
10:30 Coffee break
11:00 3 talks
12:30 Lunch break
14:00 3 talks
15:30 Coffee break
16:00 3 talks
17:30 Poster session
19:30 End of day
Thursday (June 22) 8:45 Coffee
9:00 3 talks
10:30 Coffee break
11:00 3 talks
12:30 Lunch break
14:00 3 talks
15:30 Coffee break
16:00 3 talks
17:30 Free time: transition to conference banquet
18:30 Conference banquet in Memorial Union, Tripp Commons
21:00 End of day
Friday (June 23) 8:45 Coffee
9:00 3 talks
10:30 Coffee break
11:00 3 talks
12:30 Lunch break
14:00 3 talks
15:30 Concluding remarks
15:40 End of day

See the “Local Information” page for suggested venues for lunch break.


The IPCO Conference will include a poster session on June 21, 2023. We welcome posters from anyone (particularly Ph.D. students and Postdocs) on research in any of the IPCO topics.

The deadline to submit a poster abstract is expected to be in April. More details soon!

Travel & Accommodations

How to reach Madison?

The easiest way to come to Madison is via the Dane County Regional Airport (MSN), which is a 15-minutes drive from the Discovery Building. This small airport has good domestic connections.

Attendees can also fly to the Chicago O’Hare International Airport (ORD), which has extensive international connections, and then get to Madison by car or bus. Driving to Madison takes a bit more than 2 hours (depending on traffic), while a bus ride takes approximately 3 hours. Cars can be rented at the airport, and a frequent bus service is offered by Van Galder.


We recommend the following hotels which are within walking distance of the Discovery Building:

Wisconsin Union Hotel, 1308 W Dayton St, Madison, WI 53715. Rooms available at the IPCO preferred rate of $170 per night, until May 28, 2023.

DoubleTree by Hilton Madison Downtown, 525 W Johnson St, Madison, WI 53703. Rooms available at the IPCO preferred rate of $179 per night, until May 30, 2023.

Hampton Inn & Suites Madison / Downtown, 440 W Johnson St, Madison, WI 53703.

Hilton Garden Inn Madison Downtown, 770 Regent St, Madison, WI 53715.

Graduate Madison, 601 Langdon St, Madison, WI 53703.

You can also look at other on or near-campus hotels, preferably between the Discovery Building (330 N Orchard St, Madison, WI 53715) and the Wisconsin State Capitol (2 E Main St, Madison, WI 53703).

Local Information

Conference and Summer School Venue

IPCO 2023 takes place at the University of Wisconsin-Madison which is located at Madison, Wisconsin, USA. Both the summer school and conference take place at the Discovery Building. The Summer School will be in the Orchard View Room (3rd floor), while the conference and the poster session will be in the DeLuca Forum (1st floor).
See the map below for some points of interest discussed in this page and click here for a bigger and complete view. A map of the campus can be found here.

Conference Dinner

The conference banquet takes place in the Tripp Commons room in the Memorial Union on Thursday evening, June 22. Memorial Union can be reached by a 10 minute walk from the Discovery Building.


There are several lunch venues within walking distance from the Discovery Building. Some recommended options are listed below, ordered by distance from the Discovery Building.

Dinner and NightLife

The lively city of Madison offers many possibilities for dinner and nightlife. Several venues for different types of budgets can be found in the following streets:

Getting Around

If you decide to stay in one of the recommended hotels, or any other hotel between campus and the Wisconsin State Capitol, the conference venue and most restaurants/bars are within walking distance. Other nice options to get around are:

Covid-19 Regulations

Wearing face masks is not mandatory. To ensure a safe environment for everyone, all participants are asked to behave responsibly. See also the CDC guidance.

Code of Conduct

The IPCO 2023 organizers are committed to an inclusive and respectful conference experience for all participants, free from any form of discrimination, harassment, bullying, or retaliation. We strongly believe in equality of treatment for all participants regardless of gender, gender identity/expression, sexual orientation, race, color, nationality, ethnicity, religion, age, marital status, physical appearance, disabilities, or other reasons. All participants in any of the IPCO activities agree to comply with this code of conduct, and to create an inclusive, professional, and respectful atmosphere.

If you experience or witness any type of discrimination, harassment or other unethical behavior at the conference, we strongly encourage you to report and seek advice/remedy by reporting by email to

The organizing committee reserves the right to take any necessary and appropriate action against participants who engage in inappropriate behaviors, including removing registered participants from the conference should they pose a risk to other participants.


Registration fees are listed below. Please note, early registration will end on April 1, 2023, after which fees will increase.

on or before April 1, 2023 Beginning April 2, 2023
MOS member $375 $425
General $425 $475
Student $175 $225
Summer School $75 $125
Add’l banquet ticket $60 $60

The IPCO registration fee includes the conference banquet to be held on Thursday, June 22.

Go to registration site.

Days until Conference