Ημερομηνία: Πέμπτη 14/5/2026

Ώρα: 13:00 - 14:00
Αίθουσα: Γ31
Ομιλητής:Sokratis Zikas (IMPA)
Title: On simplicity of the Cremona groups

Abstract: The Cremona group or rank n is the group of birational transformations of the projective space of dimension n. One of the central
questions regarding these groups, dating all the way back to the 19th century and settled only recently, is whether they are simple. In this
talk I will review the history of the problem, as well as the modern machinery that led to the proof of their non-simplicity. I will also
demonstrate how to use this machinery to obtain an explicit free product structure in dimension 3 which, among other consequences, recovers non-simplicity in an effective way.

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Ιστοσελίδα σεμιναρίου:sites.google.com/view/nkua-math-colloquium/