Séminaires : Séminaire Théorie des Nombres

Equipe(s) : tn,
Responsables :Ziyang Gao, Marc Hindry, Bruno Kahn, João Pedro P. dos Santos
Email des responsables : ziyang.gao@imj-prg.fr
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Adresse :
Description

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Orateur(s) Ambrus Pál - Imperial College,
Titre An arithmetic Yau-Zaslow formula
Date02/03/2020
Horaire14:00 à 15:00
Diffusion
Résume

There is an arithmetic refinement of the Yau-Zaslow formula by replacing the classical Euler characteristic in Beauville's argument by a variant of Levine's motivic Euler characteristic. This result implies several similar formulas for other related invariants, including Saito's determinant of cohomology, and a generalisation of a formula of Kharlamov and Rasdeaconu on counting real rational curves on real K3 surfaces. The methods of the proof are classical, and don't use motivic homotopical tools.

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