Hi,

unrelated to the seminar, this looks like a great zoom-talk next Friday for those of you interested in graph theory.

Best wishes,

R

-- Robert Šámal IÚUK MFF UK -- CSI of Charles University

---------- Forwarded message --------- From: Reza Naserasr reza@irif.fr Date: Thu, Nov 24, 2022 at 9:26 PM Subject: Graph Theory in Paris, Dec 02, 15:00, on zoom. To: gdr-im@gdr-im.fr, gt-graphes@gdr-im.fr, gdrro@services.cnrs.fr, Seminairealgo seminairealgo@listes.irif.fr Cc: Claude Tardif Claude.Tardif@rmc.ca

Dear colleagues,

We are pleased to announce a special edition of "Graph Theory in Paris" event to be held on zoom:

Speaker: Claude Tardif, from RMC.

Title of the talk: New counterexamples to Hedetniemi's conjecture

Time: Friday 02 December 2022, 15:00 Paris time (9:00 Toronto time)

More details, including the zoom link, at: https://www.irif.fr/~gtp/2022Autumn.html

Note 1: Claude will take questions and, therefore, no time limit will be posed on the talk. Moreover, we may have discussions after the talk.

Note 2: Feel free to forward this invitation to any person or group that might be interested.

=========================================

GTP is a young series, aiming to gather together graph theorists in Paris once or twice a year. Activities were naturally on pause. However, given the high interest of the subject for this session, which goes far beyond Parisian graph theorists, we decided to have this session on zoom.

*Claude will present a full resolution of Hedetniemi's conjecture in this talk. This is an old conjecture on the chromatic number of the categorical product of two graphs.*

We hope to resume our activities in 2023. For suggestions of speakers, or to help us organize next events do not hesitate to write to us.

Looking forward to seeing many of you on Dec 02,

Organizers: Reza, Valia, Zhouningxin