GdT: The Hodge Conjecture for Abelian Fourfolds, after Markman

We are organizing two seminar days, on May 7 and May 23, dedicated to Markman's proof of the Hodge conjecture for abelian fourfolds. Discussion will be centered around the preprint   https://arxiv.org/abs/2502.03415 .

The first session will take place on May 7, starting at 10 AM, in Orsay, room 3L15, and will feature four talks. Please find below the schedule.

Schedule – May 7

• 10h00 - 11h30 – Olivier Debarre (Paris): Abelian varieties of Weil type. Notes.

• 12h00 - 13h00 – Alessio Bottini (Bonn): Semiregularity of sheaves (Markman, Section 7)

• 15h00 - 16h30 – Federico Tufo (Bologna): Spin representations (Markman, Sections 2–3)

• 17h00 - 18h00 – Vanja Zuliani (Paris): Derived categories and equivalences of abelian varieties (Markman, Sections 5–6). Notes.

The second session will take place on May 23, starting at 10 AM, in Orsay, room 3L15. Please find below the schedule.

Schedule – May 23

• 10h00 - 11h30 – Salvatore Floccari (Bielefeld)

• 12h00 - 12h45 – Giovanni Mongardi (Bologna)

• 14h45 - 15h30 – Giovanni Mongardi (Bologna)

• 16h00 - 17h30 – Claire Voisin (Paris)

The talk will be broadcast on Zoom at the following link:

https://universite-paris-saclay-fr.zoom.us/j/95443979735?pwd=ZLTm2hSkiCgC5AIDe7MfJ63flBGDp9.1

Meeting ID: 95443979735

Password: To join, you will need to answer the following question: How many lines on a cubic surface?

For any question, do not hesitate to contact: 

Franco Giovenzana (franco dot giovenzana at universite-paris-saclay dot fr), or 

Franco Rota (franco dot rota at universite-paris-saclay dot fr).