Digraph structure theory has known several exciting developments recently. We propose to learn and work on topics around the directed flat wall theorem. In particular, there will be introductory talks to butterfly minors, directed tree-width, the directed grid-theorem and the directed flat wall theorem. We shall also explore links and extensions of these (matching theory, tournaments immersion, strong minors).

The workshop is intended to last one week (five workdays), starting on a Monday with two talks, an open-problem session, and the formation of groups. A typical day after Monday would have one talk, two coffee breaks and a progress report for half of the working groups (plus voluntary interventions in cases of specific news to report). The first day will have two talks, plus the open-problem session and formation of the groups. One board game evening (e.g. arena).

Jean-Sébastien Sereni, Raphael Steiner, Sebastian Wiederrecht

4-8 April 2022

form: https://9vllfi1nwke.typeform.com/to/QvaV5ep4

deadline: March XX.

(last update: March 9)

• Jean-Sébastien Sereni (organiser)
• Raphael Steiner (organiser)
• Sebastian Wiederrecht (organiser)

Submit open problems related to the themes of the workshop (generously interpreted) by email to the organisers. One main aim of the workshop is, in small groups, to work on and solve these!

template: download

Deadline: XX March.

Monday, Apr. 4th

• 09:30 — 10:00: Welcome & 1-minute “Hello World” from everybody.
• 10:00 — 11:00: Introduction Talk by Stephan Kreutzer: “TBA”
• 11:00 — 11:15: Coffee break
• 11:15 — 12:15: Talk (TBA)
• 13:15 — 14:45: Open problem session
• 14:45 — 15:00: Tea break
• 15:00 — 15:45: Partition into groups

Tuesday, Apr. 5th

• 09:30 — 10:00: Talk (TBA)
• 10:00 — 10:15: Coffee break
• 15:00 — 16:00: Progress report
• 16:00 — 16:15: Tea break

Wednesday, Apr. 6th

• 09:30 — 10:00: Talk (TBA)
• 10:00 — 10:15: Coffee break
• 15:00 — 16:00: Progress report
• 16:00 — 16:15: Tea break
• 20:00 — ??: Social event on arena (bring dice)

Thursday, Apr. 7th

• 09:30 — 10:00: Talk by Shoham Letzter about complete digraph immersions in Eulerian digraphs.
• 10:00 — 10:15: Coffee break
• 15:00 — 16:00: Progress report
• 16:00 — 16:15: Tea break

Friday, Apr. 8th

• 09:30 — 10:00: Talk (TBA)
• 10:10 — 10:15: Coffee break
• 14:15 — 14:30: Tea break
• 14:30 — 16:00: Wrap-up meeting