Midsummer Combinatorial Workshop XXI
July 27 - July 31, 2015, Prague
The workshop continues the tradition of Prague Combinatorial Workshops held since 1993. Oriented on problems of all fields of graph theory, combinatorics and discrete geometry, it will continue in the spirit and informal working atmosphere of the previous meetings.
The workshop takes place at DIMATIA and the Department of Applied Mathematics of Charles University, Malostranske namesti 25, Prague 1, which is located in a historic building in the center of Old Prague. The workshop is also supported by Computer Science Institute of Charles University.
The workshop participation is by invitation only. Regardless, if you wish to participate, please email the organizers and we will respond to you shortly. In case you need an invitation letter (for example for your visa), please let us know and we will be happy to write one for you.
Coffee breaks and part of the meals are provided by the organizers. However, we will collect a modest fee of EUR 70 towards a fraction of the expenses.
As is the tradition, the program of the workshop is determined from day to day. The afternoons are reserved for discussions and other activities. If you intend to give a talk during the MCW, please let us know a few days in advance.
- 9:30 Registration + welcome coffee.
- 10:00 at Lecture Room S5: Workshop starts.
- 13:00 Lunch.
- Afternoon: Individual program.
Tuesday - Friday
- 9:00 Talks start.
- 10:30 Coffee break.
- 13:00 Lunch.
List of lectures
- Jiří Sgall: Online Algorithms for Multi-Level Aggregation
- Pavel Valtr: On the obstacle complexity number of a graph
- Dominique Andres
- Martin Koutecký: Applying Convex Integer Programming: Sum Multicoloring on Bounded Neighborhood Diversity
- Guus Regts: Zero-free regions of partition functions, sparse graph limits and algorithms
- John Gimbel: The obstacle number of a planar graph
- Imre Bárány: Block partitions of sequences
- Tomáš Valla: On the tree search problem
- Jozsef Solymosi: Touching and kissing; algebra in discrete geometry
- Peter Zeman: Automorphism groups of geometrically represented graphs
- Matt DeVos: On 3-flows with big support
- Jan Foniok: Find me another adjoint pair!
- Ida Kantor: Minimum difference representations of graphs
- Stanislav Jendrol: Facial colorings of plane graphs
- Peter Allen: Almost all trees are almost graceful
- Konstantinos Stavropoulos: Coloring and covering nowhere dense graphs
- Bill Kay: The chromatic number of generalized shift groups
- Pavel Klavík: Automorphism groups of planar graphs
- András Gyárfás: Chromatic Ramsey numbers (two problems)
- Imdad Ullah Khan: Perfect matchings in uniform hypergraphs
- Troy Retter: Size Ramsey numbers
- Ronald de Wolf: Quantum property testing
- Martin Balko: Drawing graphs unsing a small number of obstacles
- Michael Stiebitz: Coloring of signed graphs
- Robert Šámal: Testing if a graph is a core of vector coloring
- Julia Böttcher: Resilience of random graphs for spanning subgraphs
- Tereza Klimošová: Infinitely dimensional finitely forcible graphons
- Immanuel Albrecht: Simple gammoids of rank 3 have possitive colines
- Endre Csóka: Limits of some combinatorial problems
- Patrice Ossona de Mendez: Clustering graphs in a local convergent sequence
- Louis Vena Cros: Random graphs and limits
If you arrive later during the workshop, please register with the secretaries in the room 222 (at the 2nd floor).
On Wednesday afternoon, there will be an awesome social event. We will visit the Museum of Antonín Dvořák, who was a famous Czech composer. In the evening, there will be a workshop raut.
Besides the workshop itself, you are free to use the following facilities of our departments:
- Two open lounges with tables, chairs and a whiteboard opposite the Lecture Room S5. You can take the lounges on a first come, first serve basis. Great for working on open problems in the afternoon!
- Two open lounges with tables, chairs and a whiteboard on the third floor, directly above the lounges on the second floor. Same rules apply.
- Water coolers in the hall with the open lounges -- both on second and third floor.
If you need anything else, contact the organizers.
Travel info (public transport)
For the public transportation you can buy a 90-minute ticket for 32 CZK or 30-minute for 24 CZK in a newsstand or in a vending machine. The vending machines only accept coins (no credit cards, no paper money).
The ticket needs to be validated (in a magic yellow validating machine with a shining arrow). The validating machines are located inside buses and trams. In the Metro subway system, the machine is located at the entryway to the station.
If you need to find a tram connection, you can use the official website. The department building is located near the tram stop "Malostranske namesti". You can see it from the tram stop. It is this building.
Airport -> Marianeum Hotel
- Take bus number 119 to Nádraží Veleslavín station (last stop).
- Transfer to Metro subway A (green line) and take it to the station Namesti Miru.
- Take the tram 22 (direction: Kubanske namesti) for one stop to the tram stop Jana Masaryka (location here), and walk to the hotel (hotel location here) from that stop.
- Alternately: for a faster but slightly longer walk, you can walk from the station Namesti Miru as follows: Take the Americka street and when you reach the intersection with Machova street, your hotel is nearby (hotel location here).
Marianeum Hotel -> MCW
- Walk to the tram stop Jana Masaryka (location here)
- Take the tram 22 (direction: Kralovka) to the stop Malostranske namesti.
Airport -> Karolinum Hotel
- From airport to Karolinum take bus number 119 to Nádraží Veleslavín station (last stop).
- Transfer to Metro subway A (green line) and take it to the station Staromestska.
- Exit the subway and continue on foot:
- Take the Kaprova street to the Old Town Square.
- From the Old Town Square go through the Celetna street to your hotel.
Karolinum Hotel -> MCW
- Walk to the Subway station Staromestska.
- Take the Metro subway line A (direction: Nemocnice Motol) to Malostranska.
- Exit the subway at Malostranska and take one stop with any of the following trams: 12, 20 or 22 to Malostranske namesti.
All e-mail correspondence concerning the workshop (e.g. registration, accommodation) should be directed to firstname.lastname@example.org.
Senior organizer: Jaroslav Nešetřil
Junior organizer: Zuzana Patáková
- Midsummer Workshop XX - July 28 - August 1, 2014
- Midsummer Workshop XIX - July 29 - August 2, 2013
- Midsummer Workshop XVIII - July 30 - August 3, 2012
- Midsummer Workshop XVII - July 25 - July 29, 2011
- Midsummer Workshop XVI - July 26 - July 30, 2010
- Midsummer Workshop XV - July 27 - July 31, 2009
- Midsummer Workshop XIV - July 28 - August 1, 2008
- Midsummer Workshop XIII - July 30 - August 3, 2007
- Midsummer Workshop XII - July 25 - 29, 2005
- Midsummer Workshop XI - July 26 - 30, 2004
- Midsummer Workshop X - July 28 - August 1, 2003
- Midsummer Workshop IX - July 29 - August 2, 2002
- Midsummer Workshop VIII - July 30 - August 3, 2001
- Midsummer Workshop VII - August 7 - 11, 2000
- Midsummer Workshop VI - July 26 - 30, 1999
- Midsummer Workshop V - July 26 - August 2, 1997
- Midsummer Workshop IV - July 28 - August 2, 1996
- Midsummer Workshop III - August 24-20, 1995
- Midsummer Workshop II - July 24-30, 1994
- Midsummer Workshop I - July 25-30, 1993
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