Changho Han (한창호, Korea University)
Changho Han (한창호) Visitor (2024.10.13-2024.10.14) from Korea University Office: -
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Changho Han, Trigonal Curves and Associated K3 Surfaces
Changho Han, Trigonal Curves and Associated K3 Surfaces
Speaker Changho Han Korea university K3 surfaces, as a generalization of elliptic curves, have a rich amount of geometric properties. Recalling that elliptic curves are double covers of rational curves branched over 4 distinct points, there are K3 surfaces that are cyclic triple covers of rational surfaces; Artebani and Sarti classified such generic …
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Justin Lacini, On Log del Pezzo Surfaces in Positive Characteristic
Justin Lacini, On Log del Pezzo Surfaces in Positive Characteristic
Speaker Justin Lacini Princeton university A log del Pezzo surface is a normal surface with only Kawamata log terminal singularities and anti-ample canonical class. Over the complex numbers, Keel and McKernan have classified all but a bounded family of log del Pezzo surfaces of Picard number one. In this talk we will extend …
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David Sykes, CR Hypersurfaces, Studying 2-nondegenerate Structures via Absolute Parallelisms
David Sykes, CR Hypersurfaces, Studying 2-nondegenerate Structures via Absolute Parallelisms
Speaker David Sykes IBS CCG The basic problem of finding (local) biholomorphisms mapping one real hypersurface in a complex space onto another is only well understood for a limited class of hypersurfaces, and has a fundamental relationship to their induced CR geometries. Following a light historical survey of major results in the area, …
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Naoto Yotsutani (Kagawa University)
Naoto Yotsutani Visitor (2024.10.26-2024.10.29) from Kagawa University Office: -
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Naoto Yotsutani, Bott Manifolds with the Strong Calabi Dream Structure
Naoto Yotsutani, Bott Manifolds with the Strong Calabi Dream Structure
Speaker Naoto Yotsutani Kagawa university We prove that if the Futaki invariant of a polarized Bott manifold (X, L) for any ample line bundle L vanishes, then X is isomorphic to the products of the projective lines. This talk is based on a work joint with Kento Fujita (algebro-geometrical approach), and another independent …