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 2015 X-WR-CALDESC:Algebraic Geometry Seminar at University of Utah Mathematics Department X-WR-TIMEZONE:America/Denver BEGIN:VEVENT UID:20150120T153000-sho-tanimoto@math.utah.edu DTSTART;TZID=America/Denver:20150120T153000 DTEND;TZID=America/Denver:20150120T163000 DTSTAMP:20260819T205508Z SUMMARY:Balanced line bundles DESCRIPTION:Speaker: Sho Tanimoto\, Rice University\n\nWhen we count rational points of bounded height on algebraic varieties, it is important to exclude exceptional sets to capture the generic distribution of rational points on underlying varieties. This idea leads to the notion of balanced line bundles, and the study of balanced line bundles can be … LOCATION:LCB 215 URL:http://math.utah.edu/agseminar/2015-spring/ END:VEVENT BEGIN:VEVENT UID:20150127T153000-nicola-tarasca@math.utah.edu DTSTART;TZID=America/Denver:20150127T153000 DTEND;TZID=America/Denver:20150127T163000 DTSTAMP:20260819T205508Z SUMMARY:Pointed Castelnuovo numbers DESCRIPTION:Speaker: Nicola Tarasca\, University of Utah\n\nThe classical Castelnuovo numbers count linear series of minimal degree and fixed dimension on a general curve, in the case when this number is finite. For pencils, that is, linear series of dimension one, the Castelnuovo specialize to the better known Catalan numbers. In this talk, I will present a … LOCATION:LCB 215 URL:http://math.utah.edu/agseminar/2015-spring/ END:VEVENT BEGIN:VEVENT UID:20150203T153000-christopher-hacon@math.utah.edu DTSTART;TZID=America/Denver:20150203T153000 DTEND;TZID=America/Denver:20150203T163000 DTSTAMP:20260819T205508Z SUMMARY:The ACC for LCTs DESCRIPTION:Speaker: Christopher Hacon\, University of Utah\n\nLog canonical thresholds are important invariants of singularites of pairs which play an important role in higher dimensional birational geometry (and many other subjects). Shokurov conjectured that (in a fixed dimension) the set of all possible log canonical thresholds T_n should enjoy some … LOCATION:LCB 215 URL:http://math.utah.edu/agseminar/2015-spring/ END:VEVENT BEGIN:VEVENT UID:20150210T153000-pedro-acosta@math.utah.edu DTSTART;TZID=America/Denver:20150210T153000 DTEND;TZID=America/Denver:20150210T163000 DTSTAMP:20260819T205508Z SUMMARY:Extending the Landau-Ginzburg/Calabi-Yau correspondence to non-Calabi-Yau hypersurfaces in weighted projective space DESCRIPTION:Speaker: Pedro Acosta\, University of Michigan\n\nIn the early days of mirror symmetry, physicists noticed a remarkable relation between the Calabi-Yau geometry of a hypersurface in projective space defined by a homogenous polynomial W and the singularity theory of the Landau-Ginzburg model with superpotential W. This relation came to be known as … LOCATION:LCB 215 URL:http://math.utah.edu/agseminar/2015-spring/ END:VEVENT BEGIN:VEVENT UID:20150219T153000-j%C3%A9r%C3%A9my-gu%C3%A9r%C3%A9@math.utah.edu DTSTART;TZID=America/Denver:20150219T153000 DTEND;TZID=America/Denver:20150219T163000 DTSTAMP:20260819T205508Z SUMMARY:Some FJRW invariants without concavity. NOTE SPECIAL DATE. DESCRIPTION:Speaker: Jérémy Guéré\, Institut Mathématique de Jussieu\n\nIn this talk, I will explain how to compute FJRW invariants in genus zero for a large class of polynomials which do not satisfy the concavity hypothesis. This should be seen as the counterpart of Gromov--Witten theory for hypersurfaces where convexity fails. Moreover, to get a complete description … LOCATION:LCB 215 URL:http://math.utah.edu/agseminar/2015-spring/ END:VEVENT BEGIN:VEVENT UID:20150224T153000-chen-jiang@math.utah.edu DTSTART;TZID=America/Denver:20150224T153000 DTEND;TZID=America/Denver:20150224T163000 DTSTAMP:20260819T205508Z SUMMARY:Boundedness of anti-canonical volumes of singular log Fano threefolds. DESCRIPTION:Speaker: Chen Jiang\, University of Tokyo\n\nWe prove Weak Borisov-Alexeev-Borisov Conjecture in dimension three which states that the anti-canonical volume of an $\epsilon$-klt log Fano pair of dimension three is bounded from above. LOCATION:LCB 215 URL:http://math.utah.edu/agseminar/2015-spring/ END:VEVENT BEGIN:VEVENT UID:20150303T153000-renzo-cavalieri@math.utah.edu DTSTART;TZID=America/Denver:20150303T153000 DTEND;TZID=America/Denver:20150303T163000 DTSTAMP:20260819T205508Z SUMMARY:Tropicalizing a Hurwitz theorist. DESCRIPTION:Speaker: Renzo Cavalieri\, Colorado State University\n\nThe goal of this seminar is to review and contextualize the evolution of my thoughts and interactions with tropical geometry. This talk is based on collaborative work always with Hannah Markwig, and at different times with each one of Aaron Bertram, Paul Johnson and Dhruv Ranganathan. Back in 2007, … LOCATION:LCB 215 URL:http://math.utah.edu/agseminar/2015-spring/ END:VEVENT BEGIN:VEVENT UID:20150310T153000-kimiko-yamada@math.utah.edu DTSTART;TZID=America/Denver:20150310T153000 DTEND;TZID=America/Denver:20150310T163000 DTSTAMP:20260819T205508Z SUMMARY:Sigularities and Kodaira dimension of moduli of stable sheaves over an elliptic surface DESCRIPTION:Speaker: Kimiko Yamada\, Okayama University of Science, Japan\n\nLet M be a moduli scheme of stable sheaves on a complex elliptic surface. We want to know its birational structure, especially its Kodaira dimension. For this end, it is important to understand its singularities. What is known about such problems now? LOCATION:LCB 215 URL:http://math.utah.edu/agseminar/2015-spring/ END:VEVENT BEGIN:VEVENT UID:20150317T153000-speaker@math.utah.edu DTSTART;TZID=America/Denver:20150317T153000 DTEND;TZID=America/Denver:20150317T163000 DTSTAMP:20260819T205508Z SUMMARY:SPRING BREAK DESCRIPTION:Speaker: speaker\n\n LOCATION:LCB 215 URL:http://math.utah.edu/agseminar/2015-spring/ END:VEVENT BEGIN:VEVENT UID:20150324T153000-tong-zhang@math.utah.edu DTSTART;TZID=America/Denver:20150324T153000 DTEND;TZID=America/Denver:20150324T163000 DTSTAMP:20260819T205508Z SUMMARY:On families of curves over surfaces and geography of irregular 3-folds DESCRIPTION:Speaker: Tong Zhang\, University of Alberta\n\nOne of the fundamental invariants for families of curves is the slope. In this talk, I will state a slope inequality for families of curves over surfaces. In fact, it is closely related to the "slope" in the geography of irregular varieties. I will also introduce this notion and present some recent … LOCATION:LCB 215 URL:http://math.utah.edu/agseminar/2015-spring/ END:VEVENT BEGIN:VEVENT UID:20150331T153000-noah-giansiracusa@math.utah.edu DTSTART;TZID=America/Denver:20150331T153000 DTEND;TZID=America/Denver:20150331T163000 DTSTAMP:20260819T205508Z SUMMARY:Tropical schemes and the Berkovich analytification DESCRIPTION:Speaker: Noah Giansiracusa\, University of Georgia\n\nIn “Equations of tropical varieties,” J.H.Giansiracusa and I introduced a scheme-theoretic framework for tropicalization and tropical geometry. In this talk I’ll discuss recent developments in this program. Specifically, we introduce a canonical embedding of any scheme in an F1-scheme (in essence, a … LOCATION:LCB 215 URL:http://math.utah.edu/agseminar/2015-spring/ END:VEVENT BEGIN:VEVENT UID:20150407T153000-nikolaos-tziolas@math.utah.edu DTSTART;TZID=America/Denver:20150407T153000 DTEND;TZID=America/Denver:20150407T163000 DTSTAMP:20260819T205508Z SUMMARY:Automorphisms of smooth canonically polarised surfaces in positive characteristic. DESCRIPTION:Speaker: Nikolaos Tziolas\, University of Cyprus / Princeton\n\nLet X be a smooth canonically polarised surface defined over an algebraically closed field of characteristic p>0. In this talk I will present some results about the geometry of X in the case when the automorphism scheme Aut(X) of X is not smooth, or equivalently X has nontrivial global vector … LOCATION:LCB 215 URL:http://math.utah.edu/agseminar/2015-spring/ END:VEVENT BEGIN:VEVENT UID:20150414T153000-dustin-ross@math.utah.edu DTSTART;TZID=America/Denver:20150414T153000 DTEND;TZID=America/Denver:20150414T163000 DTSTAMP:20260819T205508Z SUMMARY:Donaldson-Thomas Theory and Crepant Resolutions DESCRIPTION:Speaker: Dustin Ross\, University of Michigan\n\nFor a fixed Calabi-Yau threefold X, Donaldson-Thomas (DT) theory, roughly, is the study of certain Euler characteristics of Hilbert schemes of curves in X. If X is an orbifold with crepant resolution Y, Bryan, Cadman, and Young conjectured that the DT theory of X and Y should be related in a simple … LOCATION:LCB 215 URL:http://math.utah.edu/agseminar/2015-spring/ END:VEVENT BEGIN:VEVENT UID:20150420T150000-marc-burger@math.utah.edu DTSTART;TZID=America/Denver:20150420T150000 DTEND;TZID=America/Denver:20150420T160000 DTSTAMP:20260819T205508Z SUMMARY:On volumes of representations DESCRIPTION:Speaker: Marc Burger\, ETH, Zurich\n\nAbstract: In many instances one can define the notion of volume of a representation of the fundamental group of a closed manifold M into a simple (non-compact) Lie group G. This is so for instance if M is a surface and the symmetric space associated to G is hermitian, that is carries an invariant … LOCATION:LCB 215 URL:http://math.utah.edu/agseminar/2015-spring/ END:VEVENT BEGIN:VEVENT UID:20150421T153000-zsolt-patakfalvi@math.utah.edu DTSTART;TZID=America/Denver:20150421T153000 DTEND;TZID=America/Denver:20150421T163000 DTSTAMP:20260819T205508Z SUMMARY:On projectivity of the moduli space of stable surfaces in characteristic p > 5 DESCRIPTION:Speaker: Zsolt Patakfalvi\, Princeton University\n\nStable varieties are higher dimensional generalizations of stable curves. Their moduli space contains an open locus parametrizing varieties of general type up to birational equivalence, just as the space of stable curves contains the space of smooth curves in dimension one. Furthermore, also … LOCATION:LCB 215 URL:http://math.utah.edu/agseminar/2015-spring/ END:VEVENT BEGIN:VEVENT UID:20150428T153000-motohico-mulase@math.utah.edu DTSTART;TZID=America/Denver:20150428T153000 DTEND;TZID=America/Denver:20150428T163000 DTSTAMP:20260819T205508Z SUMMARY:Quantum curves and topological recursion DESCRIPTION:Speaker: Motohico Mulase\, UC Davis\n\nQuantum curves are conceived in physics as a result of geometric quantization of the SL(2) character variety of a knot group, which is an infinite-order differential operator that characterizes the colored Jones polynomial. The physics speculation relates the character variety, which is an algebraic … LOCATION:LCB 215 URL:http://math.utah.edu/agseminar/2015-spring/ END:VEVENT END:VCALENDAR