| Equipe(s) : | tga, |
| Responsables : | Cyril Demarche, Diego Izquierdo et Charles De Clercq |
| Email des responsables : | |
| Salle : | |
| Adresse : | Campus Pierre et Marie Curie |
| Description | Le séminaire a généralement lieu à Jussieu (Sorbonne Université, Paris), un vendredi par mois, entre 14h30 et 17h. |
| Orateur(s) | Maksim Zhykhovich - Munich, |
| Titre | The J-invariant of algerbas with orthogonal involution |
| Date | 17/06/2022 |
| Horaire | 15:30 à 16:30 |
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| Diffusion | https://bigbluebutton.imj-prg.fr/b/cyr-xch-bqw-ao3 |
| Résume | The J-invariant of a semi-simple algebraic group G was introduced by Petrov, Semenov and Zainoulline in 2008. The J-invariant is a discrete invariant which encodes the motivic decomposition of the variety of Borel subgroups in G. Let (A, σ) be a central simple algebra with orthogonal involution and trivial discriminant. The J-invariant of (A,σ) is defined as J(PGO+(A,σ)). In this talk I will discuss a conjecture of Quéguiner-Mathieu, Semenov and Zainoulline, which allows to reduce the computation of J(A,σ) to the case of quadratic forms. |
| Salle | Jussieu, salle 16-26-113 |
| Adresse | Campus Pierre et Marie Curie |