Lyon graph meetings

The graph meetings are a series of meeting in Lyon that aims at gathering people from different institutions around common interests in graph theory.

We (try to) have physical meetings twice a month, alternating between LIP (ENS Lyon) and LIRIS (University of Lyon). We usually have two 30-minute talks, on the board, with a lot of interaction.

Useful information

Announcements: The meetings are announced on the mailing list graphesalyon[at]
This mailing list is primarily used to announce seminars in the Lyon area, and is managed by Nicolas Bousquet (nicolas.bousquet[at]

Contact: For any question, contact Laurent: laurent.feuilloley[at], and for urgent matter: 06 72 31 57 **, where ** is 34.



A tentative schedule for the meetings of the semester.

→ Next meeting: June 8

Past meetings

14th graph meeting - May 5
13th graph meeting - April 4
12th graph meeting - January 17
11th graph meeting - December 13
  • The meeting took place on Tuesday December 13, at 10AM, at the LIRIS, in Salle visio. This meeting had a very low attendance, hence the speakers will give their talks again later this year.
  • Menu:
10th graph meeting - November 22

Academic year 2021-2022

9th graph meeting - June 16th
8th graph meeting - June 3rd
Seventh graph meeting - May 19th Sixth graph meeting - December 9th Fifth graph meeting - November 26th
  • The meeting took place at ENS, at the "Salle du conseil" at 10:30 AM.
  • Schedule:
    • Median and simplex graphs, by Pierre Bergé.
      Links: Median graphs on wikipedia. Two recent papers about the diameter of median graphs: here and there.
    • Model checking for first-order logic with connectivity predicate, by Alexandre Vigny.
      Links: The two papers: here and there.
Forth graph meeting - November 4th Third graph meeting - October 14th Second graph meeting - October 1st
  • The meeting took place at LIRIS, in the "Salle visio" (ground level, on the left of the entrance) at 10:30.
  • Schedule:
First graph meeting - September 20th