9 janvier 2018

Walter Gubler (Universität Regensburg)
Non-archimedean Monge-Ampère equations

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Lieu : IMO Bât. 307, salle 3L15

Résumé : We study non-archimedean volumes, a tool which allows us to control the asymptotic
growth of small sections of big powers of a metrized line bundle. We prove that the nonarchimedean volume is differentiable at a continuous semipositive metric and that the derivative is given by integration with respect to a Monge-Amp`ere measure. Such a differentiability formula had been proposed by M. Kontsevich and Y. Tschinkel. In residue characteristic zero, it implies an orthogonality property for non-archimedean plurisubharmonic functions which allows us to drop an algebraicity assumption in a theorem of S. Boucksom, C. Favre and M. Jonsson about the solution to the non-archimedean Monge-Amp`ere equation. We will also present a similar result in positive equicharacteristic assuming resolution of singularities.

Non-archimedean Monge-Ampère equations  Version PDF