Problems in Combinatorics and Posets session
Jagiellonian University, Kraków, September 12-15, 2012

The Problem session is an offshoot of a very successful course Partially ordered sets: problems and methods given by Tom Trotter in May-June 2011 at Jagiellonian University. The video records of 15 exhaustive lectures and exercise sessions with hundreds of tasks can be found here.

The workshop aims to gather people working in combinatorics with a special emphasis on those interested in posets. The full scope of considered problems should include graph theory, probabilistic combinatorics, extremal combinatorics and algorithmic problems in theoretical computer science.

It is also envisioned as a problems oriented workshop where speakers will brag more about what they can’t do than what they can. The idea is to gather interesting problems and set directions. So tell why the problem is interesting. Explain the background and why its resolution will have meaning. The collection of all open problems raised at the meeting will be available on-line.

related events

The workshop is scheduled just before the Polish Combinatorial Conference, September 17-21, 2012. There will be a bus available for all participants going from Kraków to Będlewo (probably leaving on September 16; distance: 425 km).

There is one more posets-dedicated event this year. The biennial SIAM Conference on Discrete Mathematics, June 18-21, 2012 will contain a minisymposium on posets led by Tom Trotter.

fee and support

There is no fee and no financial support for participants is available.


The organizers recommend to stay in Hotel Ruczaj, (+48 12 2691000; Its only 5min walk away from the faculty building. Participants of the workshop can get a special rate: 180 PLN / night for single room and 250 PLN / night for double room. There is a wireless internet access in the entire building of the hotel.


  • Csaba Biro, University of Louisville
  • Bartłomiej Bosek, Jagiellonian University
  • Lech Duraj, Jagiellonian University
  • Michał Farnik, Jagiellonian University
  • Stefan Felsner, Technical University Berlin
  • Katarzyna Grygiel, Jagiellonian University
  • Grzegorz Gutowski, Jagiellonian University
  • Udo Hoffman, Technical University Berlin
  • Katharina Jochemko, Free University Berlin
  • Tomasz Krawczyk, Jagiellonian University
  • Grzegorz Matecki, Jagiellonian University
  • Piotr Micek, Jagiellonian University
  • Kevin Milans, West Virginia University
  • Arkadiusz Pawlik, Jagiellonian University
  • Aleksander Rutkowski, Warsaw University of Technology
  • Casey Tompkins, Central European University, Budapest
  • William Tom Trotter, Georgia Institute of Technology
  • Veit Wiechert, Technical University Berlin
  • Stephen Young, University of Louisville


  • William Tom Trotter, Georgia Institute of Technology

and a team from Jagiellonian University

  • Bartłomiej Bosek
  • Tomasz Krawczyk
  • Grzegorz Matecki
  • Piotr Micek
  • Bartosz Walczak

Looking forward to seeing you in Kraków.