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 - Fall 2009 X-WR-CALDESC:Algebraic Geometry Seminar at University of Utah Mathematics Department X-WR-TIMEZONE:America/Denver BEGIN:VEVENT UID:20090908T153000-roi-docampo-%C3%A1lvarez@math.utah.edu DTSTART;TZID=America/Denver:20090908T153000 DTEND;TZID=America/Denver:20090908T163000 DTSTAMP:20260819T205508Z SUMMARY:Arcs on determinantal varieties DESCRIPTION:Speaker: Roi Docampo Álvarez\n\n LOCATION:LCB 225 URL:http://math.utah.edu/agseminar/2009-fall/ END:VEVENT BEGIN:VEVENT UID:20090915T153000-martin-deraux@math.utah.edu DTSTART;TZID=America/Denver:20090915T153000 DTEND;TZID=America/Denver:20090915T163000 DTSTAMP:20260819T205508Z SUMMARY:Holomorphic maps between ball quotients DESCRIPTION:Speaker: Martin Deraux\, Université de Grenoble I\n\nA recent theorem of Koziarz and Mok shows that there can be no holomorphic submersions between compact ball quotients, apart from totally geodesic coverings. After sketching the proof of their result, I will describe the known examples of holomorphic surjections between ball quotients, namely the … LOCATION:LCB 225 URL:http://math.utah.edu/agseminar/2009-fall/ END:VEVENT BEGIN:VEVENT UID:20090922T153000-amin-gholampour@math.utah.edu DTSTART;TZID=America/Denver:20090922T153000 DTEND;TZID=America/Denver:20090922T163000 DTSTAMP:20260819T205508Z SUMMARY:BPS invariants for resolutions of polyhedral singularities DESCRIPTION:Speaker: Amin Gholampour\, Caltech\n\nLet G be a finite subgroup of SO(3). Y=G-Hilb(C^3) gives the preferred Calabi-Yau resolution of singularities of C^3/G. We use two different approaches to determine the BPS invariants of Y: Gromov-Witten theory, and a specific moduli space of torsion sheaves on Y. The result is expressed in terms of … LOCATION:LCB 225 URL:http://math.utah.edu/agseminar/2009-fall/ END:VEVENT BEGIN:VEVENT UID:20090929T153000-jim-carlson@math.utah.edu DTSTART;TZID=America/Denver:20090929T153000 DTEND;TZID=America/Denver:20090929T163000 DTSTAMP:20260819T205508Z SUMMARY:Speculations on cubic surfaces: Hodge and Galois theory DESCRIPTION:Speaker: Jim Carlson\, Clay Mathematics Institute\n\nI will discuss work in progress with Domingo Toledo. (a) What can one say about the locus of cubic surfaces with periods certain number fields? (Periods to defined: not what you might think they are). (b) What can one say about their Galois representations? The main object of study is a certain … LOCATION:LCB 225 URL:http://math.utah.edu/agseminar/2009-fall/ END:VEVENT BEGIN:VEVENT UID:20091006T153000-yunfeng-jiang@math.utah.edu DTSTART;TZID=America/Denver:20091006T153000 DTEND;TZID=America/Denver:20091006T163000 DTSTAMP:20260819T205508Z SUMMARY:Counting invariants for O+O(-2)-quiver representations DESCRIPTION:Speaker: Yunfeng Jiang\n\n LOCATION:LCB 225 URL:http://math.utah.edu/agseminar/2009-fall/ END:VEVENT BEGIN:VEVENT UID:20091020T153000-davide-fusi@math.utah.edu DTSTART;TZID=America/Denver:20091020T153000 DTEND;TZID=America/Denver:20091020T163000 DTSTAMP:20260819T205508Z SUMMARY:Rationality and related problems DESCRIPTION:Speaker: Davide Fusi\n\n LOCATION:LCB 225 URL:http://math.utah.edu/agseminar/2009-fall/ END:VEVENT BEGIN:VEVENT UID:20091024T153000-speaker@math.utah.edu DTSTART;TZID=America/Denver:20091024T153000 DTEND;TZID=America/Denver:20091024T163000 DTSTAMP:20260819T205508Z SUMMARY:WAGS / Fall 2009 DESCRIPTION:Speaker: speaker\n\n LOCATION:LCB 225 URL:http://math.utah.edu/agseminar/2009-fall/ END:VEVENT BEGIN:VEVENT UID:20091027T153000-luca-scala@math.utah.edu DTSTART;TZID=America/Denver:20091027T153000 DTEND;TZID=America/Denver:20091027T163000 DTSTAMP:20260819T205508Z SUMMARY:Cohomology of the Hilbert scheme of points on a surface with values in representations of tautological bundles DESCRIPTION:Speaker: Luca Scala\, University of Chicago\n\nWe will motivate the work by an important example of the Strange Duality conjecture for moduli spaces of sheaves on the projective plane, in close relation with Barth morphism. The technique used to attack the conjecture in this case, due to Le Potier, He and Danila, uses moduli spaces of coherent … LOCATION:LCB 225 URL:http://math.utah.edu/agseminar/2009-fall/ END:VEVENT BEGIN:VEVENT UID:20091103T153000-sam-payne@math.utah.edu DTSTART;TZID=America/Denver:20091103T153000 DTEND;TZID=America/Denver:20091103T163000 DTSTAMP:20260819T205508Z SUMMARY:Topology of compactified tropicalizations DESCRIPTION:Speaker: Sam Payne\, Stanford University\n\nI will introduce compact tropicalizations of subvarieties of toric varieties over nonarchimedean fields, and discuss how the topology of these compactified tropicalizations relate to analytifications and weight filtrations. LOCATION:LCB 225 URL:http://math.utah.edu/agseminar/2009-fall/ END:VEVENT BEGIN:VEVENT UID:20091110T153000-christian-liedtke@math.utah.edu DTSTART;TZID=America/Denver:20091110T153000 DTEND;TZID=America/Denver:20091110T163000 DTSTAMP:20260819T205508Z SUMMARY:Elliptic K3 surfaces with p^n-torsion sections DESCRIPTION:Speaker: Christian Liedtke\, Stanford University / Universität Düsseldorf\n\nWe classify K3 surfaces in positive characteristic p, which come with an elliptic fibration and a section of order p^n. Since such elliptic fibrations pull back from the universal elliptic curve over the Igusa curve, which is the characteristic p-analog of the modular curves, we get explicit … LOCATION:LCB 225 URL:http://math.utah.edu/agseminar/2009-fall/ END:VEVENT BEGIN:VEVENT UID:20091117T153000-david-treumann@math.utah.edu DTSTART;TZID=America/Denver:20091117T153000 DTEND;TZID=America/Denver:20091117T163000 DTSTAMP:20260819T205508Z SUMMARY:The coherent-constructible correspondence for toric varieties DESCRIPTION:Speaker: David Treumann\, Northwestern University\n\nThis is a talk on joint work with Bohan Fang, Chiu-Chu Melissa Liu, and Eric Zaslow. An equivariant ample line bundle on a toric variety determines a polytope in a real vector space. I will discuss work we have done to extend this familiar correspondence to an equivalence of categories, between the … LOCATION:LCB 225 URL:http://math.utah.edu/agseminar/2009-fall/ END:VEVENT BEGIN:VEVENT UID:20091124T153000-speaker@math.utah.edu DTSTART;TZID=America/Denver:20091124T153000 DTEND;TZID=America/Denver:20091124T163000 DTSTAMP:20260819T205508Z SUMMARY:No seminar today DESCRIPTION:Speaker: speaker\n\n LOCATION:LCB 225 URL:http://math.utah.edu/agseminar/2009-fall/ END:VEVENT BEGIN:VEVENT UID:20091201T153000-jimmy-dillies@math.utah.edu DTSTART;TZID=America/Denver:20091201T153000 DTEND;TZID=America/Denver:20091201T163000 DTSTAMP:20260819T205508Z SUMMARY:Invariants of Dessins DESCRIPTION:Speaker: Jimmy Dillies\n\n LOCATION:LCB 225 URL:http://math.utah.edu/agseminar/2009-fall/ END:VEVENT BEGIN:VEVENT UID:20091208T153000-marco-aldi@math.utah.edu DTSTART;TZID=America/Denver:20091208T153000 DTEND;TZID=America/Denver:20091208T163000 DTSTAMP:20260819T205508Z SUMMARY:Categorical Representations and Mirror Symmetry DESCRIPTION:Speaker: Marco Aldi\, University of California, Berkeley\n\nFollowing ideas of Kontsevich-Soibelman, Tamarkin and Kajiura we study certain categorical representations of the (affine) symplectic group. Our main application is to a conjecture of Ben-Bassat regarding homological mirror symmetry for torus bundles over tori. LOCATION:LCB 225 URL:http://math.utah.edu/agseminar/2009-fall/ END:VEVENT END:VCALENDAR