EXCILL2: Extremal Combinatorics at Illinois

March 16-18, 2013

A conference hosted by the Department of Mathematics,
University of Illinois at Urbana-Champaign

Organizers: J. Balogh, A. Kostochka, B. Lidický, and D.B. West


Combinatorics is the study of existence, enumeration, and optimization of discrete configurations. It has applications in computer science, operation research, genetics, and other natural and social sciences. This conference emphasizes its optimization and extremal aspects, with topics including extremal set theory, coloring theory for graphs and hypergraphs, Ramsey theory, cycles in graphs, discrete geometry, and probabilistic methods in combinatorics.

Plenary speakers:
Invited speakers:
  • P. Balister (University of Memphis)
  • G. Chen (Georgia State University)
  • Z. Füredi (Rényi Mathematical Institute)
  • D. Galvin (University of Notre Dame)
  • P. Haxell (University of Waterloo)
  • T. Jiang (Miami University)
  • H. Kierstead (Arizona State University)
  • D. Král' (University of Warwick)
  • C. Lee (MIT)
  • J. Lenz (University of Illinois at Chicago)
  • S. Lo (Birmingham University)
  • D. Mubayi (University of Illinois at Chicago)
  • R. Mycroft (Birmingham University)
  • V. Nikiforov (University of Memphis)
  • S. Norin (McGill University)
  • A. Ruciński (Emory, GA)
  • W. Samotij (Cambridge, UK and Tel Aviv University)
  • G. Sárközy (Worcester Polytechnic Institute)
  • B. Sudakov (University of California, LA)
  • W. Trotter (Georgia Institute of Technology)
  • J. Verstraëte (University of California, SD)

List of registered participants

The conference is supported by IMA (Institute for Mathematics and its Applications) and NSF grant (DMS-0745185).

Practical information:

Poster session:

There will be a poster session on Saturday evening organized by Derrick Stolee stolee@illinois.edu. Please use poster registration page to submit your abstract if you want to join.

Registration and Support:

There are no registration fees for the conference, but please tell us as soon as possible if you plan to come. Please use the registration page to register for the conference.

Limited funds are available to defray a portion of the local expenses of some attending participants. Individuals desiring support should mention that during the registration. Deadline for support request is Feb 10. People receiving support have too fill a reimbursement form and submit together with receipts and/or photocopies of other documents to the business office. Reimbursement forms will be for pickup during the registration.

Additionally, please note that this conference is supported in part by the Institute for Mathematics and its Applications, of which the University of Illinois is a member. This support is provided through the IMA's Participating Institution (PI) program. Participating institutions may use IMA/PI funds to support travel of their personnel to this conference.

Sunday dinner reception:

There will be a dinner reception on Sunday evening from 6:30pm at Golden Harbor - 505 S Neil St Champaign, IL. The location is several block west from Altgeld hall. There is parking at the restaurant. Walking from AH takes about 20 minutes. The food will be in a shared style. A Vegetarian/Fish option is available.

Regular Vegetarian/Fish
Basil Eggplant (meat) Eggplant w Garlic Sauce (no meat)
Three Cup Chicken Three Cup Tofu
Fish with Hot Bean Sauce Yellowbean Fish
Green Beans w Fresh Garlic Green Beans w Fresh Garlic
Crispy Tofu (double order) Crispy Tofu (double order)
Beef w King Mushroom Salt/Pepper King Mushroom
BokChoy w 3Kind Mushroom BokChoy w 3Kind Mushroom
Crispy Shredded Pork Vinegar Shredded Potato
Black Bean Prawns Black Bean Prawns
Xiamen (Pork/Shrimp) Noodles Vegetarian Noodles

If you want Vegetarian/Fish, you need to tell us when you get your dinner reception ticket. Tickets for the reception will be sold on Saturday morning during registration until beginning of the afternoon sessions. Price is $15 for people with PhD and $12 for people without PhD. Speakers will get their (non-transferable) tickets for $0. We can accept cash only. Exact change would be greatly appreciated.


Parking for those staying in the Illini Union or the Hampton Inn is provided by the hotel. For others driving to campus, parking is available in the C7 parking structure at the corner of John St. and Sixth St. The entrance is on John St., which is one-way street and must be approached from the west. Any open spot may be used on Saturday and Sunday.

The airport for Champaign and Urbana is Willard Airport (airport code CMI). Only American Airlines flies to Willard Airport. The Champaign-Urbana Mass Transit District has regular AirBus service from the airport to the Illini Union. (Note: The AirBus will not be running on Sat, Sun, or Mon.)

Other airports: O'Hare (ORD), Midway (MDW) in Chicago, Indianapolis (IND), and Bloomington-Normal (BMI). Rental cars are available at all airports. Driving times: CMI - 10 minutes; ORD - 3 hours; MDW - 2.5 hours; IND - 2 hours; BMI - 1 hour.

The university maintains a web page giving a variety of travel information, particularly driving directions.


The conference will be held in the math department in Altgeld Hall. For hotel lodgings within walking distance, the Illini Union (217-333-1241) is next to Altgeld, and the Hampton Inn (1-800-HAMPTON or 217-337-1100) is about 9 short blocks away. We have reserved a block of rooms at the Illini Union for speakers and we will do the booking. Other participants should book their accommodation on their own. We have also reserved a block of rooms at the Hampton Inn at a special rate 119.00 USD/Night. Use booking site to book the hotel. The special rate expires February 13.

For those with a car, there are several other hotels in Urbana-Champaign, with cheaper prices the farther from campus and closer to the interstate highways.


If you have other question, please use lidicky@illinois.edu.

This page last modified March 14, 2013.