BEGIN:VCALENDAR VERSION:2.0 PRODID:-//University of Utah Math Department//Algebraic Geometry Seminar//EN CALSCALE:GREGORIAN METHOD:PUBLISH X-WR-CALNAME:Algebraic Geometry Seminar - Spring 2018 X-WR-CALDESC:Algebraic Geometry Seminar at University of Utah Mathematics Department X-WR-TIMEZONE:America/Denver BEGIN:VEVENT UID:20180130T153000-joe-waldron@math.utah.edu DTSTART;TZID=America/Denver:20180130T153000 DTEND;TZID=America/Denver:20180130T163000 DTSTAMP:20260819T205508Z SUMMARY:Singularities of general fibers in positive characteristic DESCRIPTION:Speaker: Joe Waldron\, Princeton University\n\nGeneric smoothness fails to hold for some fibrations in positive characteristic. We study consequences of this failure, in particularly by obtaining a canonical bundle formula relating a fiber with the normalization of its maximal reduced subscheme. This has geometric consequences, including that … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2018-spring/ END:VEVENT BEGIN:VEVENT UID:20180206T153000-grigory-mikhalkin@math.utah.edu DTSTART;TZID=America/Denver:20180206T153000 DTEND;TZID=America/Denver:20180206T163000 DTSTAMP:20260819T205508Z SUMMARY:Examples of tropical-to-Lagrangian correspondence DESCRIPTION:Speaker: Grigory Mikhalkin\, University of Geneva\n\nAccording to SYZ philosophy the same tropical object should admit two ways to be lifted classically: as a complex object, and as a (T-dual) symplectic object. While the tropical-to-complex correspondence is relatively well-studied, tropical-to-symplectic correspondence remains significantly less … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2018-spring/ END:VEVENT BEGIN:VEVENT UID:20180213T153000-lei-wu@math.utah.edu DTSTART;TZID=America/Denver:20180213T153000 DTEND;TZID=America/Denver:20180213T163000 DTSTAMP:20260819T205508Z SUMMARY:Hyperbolicity of base spaces of certain families DESCRIPTION:Speaker: Lei Wu\, University of Utah\n\nHyperbolicity is an interesting property of varieties both analytically and algebraically. I will make a recall of several hyperbolicity conjectures and related results, especially hyperbolicity of moduli spaces. Then I will discuss hyperbolicity of base spaces of families of smooth general type … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2018-spring/ END:VEVENT BEGIN:VEVENT UID:20180220T153000-tommaso-de-fernex@math.utah.edu DTSTART;TZID=America/Denver:20180220T153000 DTEND;TZID=America/Denver:20180220T163000 DTSTAMP:20260819T205508Z SUMMARY:The complex Plateau problem DESCRIPTION:Speaker: Tommaso de Fernex\, University of Utah\n\nThe complex Plateau problem has been studied in the context of CR manifolds in works of Rossi (1965) and Harvey and Lawson (1975) where it is proved that every embedded strongly pseudoconvex compact CR manifold of dimension at least 3 is the boundary of a Stein space with isolated singularities. … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2018-spring/ END:VEVENT BEGIN:VEVENT UID:20180227T153000-andreas-malmendier@math.utah.edu DTSTART;TZID=America/Denver:20180227T153000 DTEND;TZID=America/Denver:20180227T163000 DTSTAMP:20260819T205508Z SUMMARY:(1,2) polarized Kummer surfaces, elliptic fibrations, and Prym varieties DESCRIPTION:Speaker: Andreas Malmendier\, Utah State University\n\nA smooth K3 surface obtained as the blow-up of the quotient of a four-torus by the involution automorphism at all 16 fixed points is called a Kummer surface. Kummer surface need not be algebraic, just as the original torus need not be. However, algebraic Kummer surfaces obtained from abelian … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2018-spring/ END:VEVENT BEGIN:VEVENT UID:20180309T133000-yuri-tschinkel@math.utah.edu DTSTART;TZID=America/Denver:20180309T133000 DTEND;TZID=America/Denver:20180309T143000 DTSTAMP:20260819T205508Z SUMMARY:Joint AG and CA seminar: Rationality and Unirationality Note the speaker is also giving this week's colloquium on March 8. AG seminar participants are encouraged to attend. DESCRIPTION:Speaker: Yuri Tschinkel\, Courant (CIMS NYU)\n\nI will discuss cohomological obstructions to rationality, descent varieties, and unirationality questions. LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2018-spring/ END:VEVENT BEGIN:VEVENT UID:20180313T153000-speaker@math.utah.edu DTSTART;TZID=America/Denver:20180313T153000 DTEND;TZID=America/Denver:20180313T163000 DTSTAMP:20260819T205508Z SUMMARY:Cancelled DESCRIPTION:Speaker: speaker\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2018-spring/ END:VEVENT BEGIN:VEVENT UID:20180320T153000-speaker@math.utah.edu DTSTART;TZID=America/Denver:20180320T153000 DTEND;TZID=America/Denver:20180320T163000 DTSTAMP:20260819T205508Z SUMMARY:Spring Break DESCRIPTION:Speaker: speaker\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2018-spring/ END:VEVENT BEGIN:VEVENT UID:20180327T153000-yefeng-shen@math.utah.edu DTSTART;TZID=America/Denver:20180327T153000 DTEND;TZID=America/Denver:20180327T163000 DTSTAMP:20260819T205508Z SUMMARY:LG/CY correspondence for Fermat elliptic curves DESCRIPTION:Speaker: Yefeng Shen\, University of Oregon\n\nWe use holomorphic Cayley transformations of quasi-modular forms to realize a correspondence between Fan-Jarvis-Ruan-Witten invariants of Fermat elliptic polynomials and Gromov-Witten invariants of elliptic curves of all genus. Our key observation is that Belorousski-Pandharipande’s relation on … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2018-spring/ END:VEVENT BEGIN:VEVENT UID:20180403T153000-sarah-frei@math.utah.edu DTSTART;TZID=America/Denver:20180403T153000 DTEND;TZID=America/Denver:20180403T163000 DTSTAMP:20260819T205508Z SUMMARY:Moduli spaces of sheaves on a K3 surface and Galois representations DESCRIPTION:Speaker: Sarah Frei\, University of Oregon\n\nFor a fixed K3 surface, we can study various moduli spaces of sheaves having a given topological type. Under appropriate conditions on the topological data, the moduli spaces are smooth projective varieties. I will discuss a new result about the geometry and arithmetic of these moduli spaces when … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2018-spring/ END:VEVENT BEGIN:VEVENT UID:20180410T153000-roberto-svaldi@math.utah.edu DTSTART;TZID=America/Denver:20180410T153000 DTEND;TZID=America/Denver:20180410T163000 DTSTAMP:20260819T205508Z SUMMARY:On the boundedness of Calabi-Yau varieties in low dimension DESCRIPTION:Speaker: Roberto Svaldi\, University of Cambridge\n\nI will discuss new results towards the birational boundedness of low-dimensional elliptic Calabi-Yau varieties, joint work with Gabriele Di Certo. Recent work in the minimal model program suggests that pairs with trivial log canonical class should satisfy some boundedness properties. I will show … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2018-spring/ END:VEVENT BEGIN:VEVENT UID:20180417T153000-yuchen-liu@math.utah.edu DTSTART;TZID=America/Denver:20180417T153000 DTEND;TZID=America/Denver:20180417T163000 DTSTAMP:20260819T205508Z SUMMARY:K-stability of cubic threefolds DESCRIPTION:Speaker: Yuchen Liu\, Yale University\n\nWe prove the K-moduli space of cubic threefolds is identical to their GIT moduli. More precisely, the K-(semi,poly)-stability of cubic threefolds coincide to the corresponding GIT stabilities, which could be explicitly calculated. In particular, this implies that all smooth cubic threefolds admit … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2018-spring/ END:VEVENT BEGIN:VEVENT UID:20180424T143000-mirko-mauri@math.utah.edu DTSTART;TZID=America/Denver:20180424T143000 DTEND;TZID=America/Denver:20180424T153000 DTSTAMP:20260819T205508Z SUMMARY:Dual complexes of log Calabi-Yau pairs and Mori fibre spaces DESCRIPTION:Speaker: Mirko Mauri\, University College London\n\nDual complexes are CW-complexes, encoding the combinatorial data of how the irreducible components of a simple normal crossing pair intersect. They have been finding useful applications for instance in the study of degenerations of projective varieties, mirror symmetry and nonabelian Hodge theory. … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2018-spring/ END:VEVENT BEGIN:VEVENT UID:20180501T153000-speaker@math.utah.edu DTSTART;TZID=America/Denver:20180501T153000 DTEND;TZID=America/Denver:20180501T163000 DTSTAMP:20260819T205508Z SUMMARY:Final Exams DESCRIPTION:Speaker: speaker\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2018-spring/ END:VEVENT END:VCALENDAR