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Categoria evento: Algebraic and Arithmetic Geometry Seminar
TBA – Enrica Mazzon (University of Regensburg)
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TBA – Samuel Le Fourn (Institut Fourier, Grenoble)
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TBA – David Rydh (Stockholm)
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TBA – Mauro Porta (Université de Strasbourg)
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TBA – Olivier Schiffmann (CNRS and Université de Paris-Saclay)
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Degenerations of Hilbert schemes and relative VGIT – Lars Halvard Halle (Università di Bologna)
Let G be a reductive group acting on a projective variety X. In Mumford’s Geometric Invariant Theory (GIT), the formation of a quotient in this situation depends on the choice of a G-linearized ample line bundle on X. In “Variation of GIT” (VGIT),…
Fano 4-folds with $b_2>12$ are products of surfaces – Cinzia Casagrande (Università di Torino)
Let $X$ be a smooth, complex Fano 4-fold, and $b_2$ its second Betti number. We will discuss the following result: if $b_2>12$, then X is a product of del Pezzo surfaces. The proof relies on a careful study of divisorial elementary contractions $f:…
Bounded height problems and applications – Francesco Amoroso (Université de Caen)
We shall report on some recent joint works with D. Masser and U. Zannier.Let $C$ be a curve defined over $\mathbb{Q}$. In 1999, Bombieri, Masser, and Zannier proved a result which may be rephrased as a toric analogue of Silverman’s Specialization…
Log Prym varities – Andrea Di Lorenzo (Berlin)
Given a finite morphism of smooth curves, the Prym variety parametrizes line bundles on the source whose norm is isomorphic to the canonical bundle of the target. What if the target and/or the source are not smooth? Several people already…