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 2008 X-WR-CALDESC:Algebraic Geometry Seminar at University of Utah Mathematics Department X-WR-TIMEZONE:America/Denver BEGIN:VEVENT UID:20080902T153000-jimmy-dillies@math.utah.edu DTSTART;TZID=America/Denver:20080902T153000 DTEND;TZID=America/Denver:20080902T163000 DTSTAMP:20260819T205508Z SUMMARY:On some automorphisms of K3 surfaces DESCRIPTION:Speaker: Jimmy Dillies\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2008-fall/ END:VEVENT BEGIN:VEVENT UID:20080909T153000-diane-maclagan@math.utah.edu DTSTART;TZID=America/Denver:20080909T153000 DTEND;TZID=America/Denver:20080909T163000 DTSTAMP:20260819T205508Z SUMMARY:Combinatorial bounds on nef cones of varieties DESCRIPTION:Speaker: Diane Maclagan\, University of Warwick\n\nI will describe joint work with Angela Gibney describing bounds on the nef cones of varieties. These are obtained from suitable embeddings of the varieties into toric varieties and use tropical techniques. Our motivating example is the moduli space of stable rational genus zero curves with n marked … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2008-fall/ END:VEVENT BEGIN:VEVENT UID:20080916T153000-emanuele-macr%C3%AC@math.utah.edu DTSTART;TZID=America/Denver:20080916T153000 DTEND;TZID=America/Denver:20080916T163000 DTSTAMP:20260819T205508Z SUMMARY:Derived categories of cubics (after A. Kuznetsov) DESCRIPTION:Speaker: Emanuele Macrì\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2008-fall/ END:VEVENT BEGIN:VEVENT UID:20080923T153000-jaume-amor%C3%B3s@math.utah.edu DTSTART;TZID=America/Denver:20080923T153000 DTEND;TZID=America/Denver:20080923T163000 DTSTAMP:20260819T205508Z SUMMARY:Kaehler manifolds with locally free actions DESCRIPTION:Speaker: Jaume Amorós\, Universitat Politècnica de Catalunya\n\nA connected complex Lie group acting locally freely on a closed Kaehler manifold must be abelian. After a review of holomorphic tangent vector fields on such manifolds, I will present joint work with M. Manjarin and M. Nicolau on the topology and classification of such manifolds. LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2008-fall/ END:VEVENT BEGIN:VEVENT UID:20080930T153000-aaron-bertram@math.utah.edu DTSTART;TZID=America/Denver:20080930T153000 DTEND;TZID=America/Denver:20080930T163000 DTSTAMP:20260819T205508Z SUMMARY:Points in the plane ♡ the derived category DESCRIPTION:Speaker: Aaron Bertram\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2008-fall/ END:VEVENT BEGIN:VEVENT UID:20081007T153000-yunfeng-jiang@math.utah.edu DTSTART;TZID=America/Denver:20081007T153000 DTEND;TZID=America/Denver:20081007T163000 DTSTAMP:20260819T205508Z SUMMARY:The quantum cohomology of root gerbes DESCRIPTION:Speaker: Yunfeng Jiang\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2008-fall/ END:VEVENT BEGIN:VEVENT UID:20081021T153000-christopher-hacon@math.utah.edu DTSTART;TZID=America/Denver:20081021T153000 DTEND;TZID=America/Denver:20081021T163000 DTSTAMP:20260819T205508Z SUMMARY:Associated centers of log canonical singularities DESCRIPTION:Speaker: Christopher Hacon\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2008-fall/ END:VEVENT BEGIN:VEVENT UID:20081028T153000-enka-lakuriqi@math.utah.edu DTSTART;TZID=America/Denver:20081028T153000 DTEND;TZID=America/Denver:20081028T163000 DTSTAMP:20260819T205508Z SUMMARY:Mirrors of Enriques Surfaces DESCRIPTION:Speaker: Enka Lakuriqi\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2008-fall/ END:VEVENT BEGIN:VEVENT UID:20081108T153000-speaker@math.utah.edu DTSTART;TZID=America/Denver:20081108T153000 DTEND;TZID=America/Denver:20081108T163000 DTSTAMP:20260819T205508Z SUMMARY:WAGS / Fall 2008 DESCRIPTION:Speaker: speaker\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2008-fall/ END:VEVENT BEGIN:VEVENT UID:20081110T150000-hsian-hua-tseng@math.utah.edu DTSTART;TZID=America/Denver:20081110T150000 DTEND;TZID=America/Denver:20081110T160000 DTSTAMP:20260819T205508Z SUMMARY:Extensions of finite groups, group algebras, and decomposition of étale gerbes DESCRIPTION:Speaker: Hsian-Hua Tseng\, University of Wisconsin-Madison\n\nLet G be a finite group. A G-gerbe over a space X may be intuitively thought of as a fiber bundle over X with fibers being the classifying space (stack) BG. In particular BG itself is the G-gerbe over a point. A more interesting class of examples consist of G-gerbes over BQ, which are equivalent to … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2008-fall/ END:VEVENT BEGIN:VEVENT UID:20081118T153000-tommaso-de-fernex@math.utah.edu DTSTART;TZID=America/Denver:20081118T153000 DTEND;TZID=America/Denver:20081118T163000 DTSTAMP:20260819T205508Z SUMMARY:Extending rationally connected fibrations from subvarieties DESCRIPTION:Speaker: Tommaso de Fernex\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2008-fall/ END:VEVENT BEGIN:VEVENT UID:20081121T153000-maurice-rojas@math.utah.edu DTSTART;TZID=America/Denver:20081121T153000 DTEND;TZID=America/Denver:20081121T163000 DTSTAMP:20260819T205508Z SUMMARY:Hilbert's Tenth Problem in Low Dimensions DESCRIPTION:Speaker: Maurice Rojas\, Texas A&M University\n\nHilbert's Tenth Problem (HTP) asks for an algorithm to decide the existence of integer solutions to arbitrary polynomial equations. HTP was solved in the negative by Davis, Putnam, Robinson, and Matiyasevich around 1970 and, about two decades later, Z. W. Sun proved that undecidability starts … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2008-fall/ END:VEVENT BEGIN:VEVENT UID:20081125T153000-milena-hering@math.utah.edu DTSTART;TZID=America/Denver:20081125T153000 DTEND;TZID=America/Denver:20081125T163000 DTSTAMP:20260819T205508Z SUMMARY:Positivity of toric vector bundles DESCRIPTION:Speaker: Milena Hering\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2008-fall/ END:VEVENT BEGIN:VEVENT UID:20081209T153000-tommaso-de-fernex@math.utah.edu DTSTART;TZID=America/Denver:20081209T153000 DTEND;TZID=America/Denver:20081209T163000 DTSTAMP:20260819T205508Z SUMMARY:On the ascending chain condition for log canonical thresholds DESCRIPTION:Speaker: Tommaso de Fernex\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2008-fall/ END:VEVENT END:VCALENDAR