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 2020 X-WR-CALDESC:Algebraic Geometry Seminar at University of Utah Mathematics Department X-WR-TIMEZONE:America/Denver BEGIN:VEVENT UID:20200108T153000-yuchen-liu@math.utah.edu DTSTART;TZID=America/Denver:20200108T153000 DTEND;TZID=America/Denver:20200108T163000 DTSTAMP:20260819T205508Z SUMMARY:Discreteness of local volumes DESCRIPTION:Speaker: Yuchen Liu\, Yale\n\nA few years ago, Chi Li introduced the notion of local volume of Kawamata log terminal (klt) singularities as the minimum normalized volume of valuation. This invariant carries lots of interesting geometric information of the singularity, for instance: it characterizes smooth points; it detects … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2020-spring/ END:VEVENT BEGIN:VEVENT UID:20200114T153000-carl-lian@math.utah.edu DTSTART;TZID=America/Denver:20200114T153000 DTEND;TZID=America/Denver:20200114T163000 DTSTAMP:20260819T205508Z SUMMARY:Enumerating pencils with moving ramification on curves DESCRIPTION:Speaker: Carl Lian\, Columbia University\n\nWe consider the general problem of enumerating branched covers of the projective line from a fixed general curve subject to ramification conditions at possibly moving points. Our main computations are in genus 1; the theory of limit linear series allows one to reduce to this case. We first obtain a … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2020-spring/ END:VEVENT BEGIN:VEVENT UID:20200211T153000-ben-wormleighton@math.utah.edu DTSTART;TZID=America/Denver:20200211T153000 DTEND;TZID=America/Denver:20200211T163000 DTSTAMP:20260819T205508Z SUMMARY:McKay correspondence and walls for G-Hilb DESCRIPTION:Speaker: Ben Wormleighton\, UC Berkeley\n\nThe McKay correspondence takes many guises but at its core connects the geometry of minimal resolutions for quotient singularities C^n / G to the representation theory of the group G. When G is an abelian subgroup of SL(3), Craw-Ishii showed that every minimal resolution can be realised as a moduli … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2020-spring/ END:VEVENT BEGIN:VEVENT UID:20200218T153000-fabio-bernasconi@math.utah.edu DTSTART;TZID=America/Denver:20200218T153000 DTEND;TZID=America/Denver:20200218T163000 DTSTAMP:20260819T205508Z SUMMARY:On del Pezzo fibrations in positive characteristic DESCRIPTION:Speaker: Fabio Bernasconi\, University of Utah\n\nDel Pezzo fibrations appear naturally as one of the possible outcomes of the Minimal Model Program for threefolds. In this talk, I will discuss some 'pathologies' that can appear in characteristic p and how it is possible to bound the bad behaviour of such fibrations depending on the prime p. This … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2020-spring/ END:VEVENT BEGIN:VEVENT UID:20200225T153000-kenta-sato@math.utah.edu DTSTART;TZID=America/Denver:20200225T153000 DTEND;TZID=America/Denver:20200225T163000 DTSTAMP:20260819T205508Z SUMMARY:Akizuki-Nakano vanishing on globally F-split 3-folds and its application DESCRIPTION:Speaker: Kenta Sato\, RIKEN\n\nBy Raynaud's result, Akizuki-Nakano vanishing theorem holds on a smooth globally F-split variety if the characteristic is larger than or equal to the dimension. However, very little is known for singular varieties. In this talk, we first show a weak form of the Akizuki-Nakano vanishing theorem on … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2020-spring/ END:VEVENT BEGIN:VEVENT UID:20200303T153000-karl-schwede@math.utah.edu DTSTART;TZID=America/Denver:20200303T153000 DTEND;TZID=America/Denver:20200303T163000 DTSTAMP:20260819T205508Z SUMMARY:Perfectoid BCM-Regular Singularities DESCRIPTION:Speaker: Karl Schwede\, Univeristy of Utah\n\nI will discuss a class of singularities defined using the Big Cohen-Macaulay algebras coming out of work of Andre, Bhatt and Gabber. These are a mixed characteristic analog of KLT and strongly F-regularity singularities. I will focus on some new work which lets us show large classes of singularities … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2020-spring/ END:VEVENT BEGIN:VEVENT UID:20200317T153000-alexander-polishchuk@math.utah.edu DTSTART;TZID=America/Denver:20200317T153000 DTEND;TZID=America/Denver:20200317T163000 DTSTAMP:20260819T205508Z SUMMARY:Atiyah classes for global matrix factorizations DESCRIPTION:Speaker: Alexander Polishchuk\, University of Oregon\n\nThis is a joint work with Bumsig Kim. We define the notion of Atiyah class for global matrix factorization and use it to calculate the categorical Chern character. The key role is played by the analog in this context of the Lie algebra structure on the shifted tangent bundle defined and studied by … LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2020-spring/ END:VEVENT BEGIN:VEVENT UID:20200324T153000-speaker@math.utah.edu DTSTART;TZID=America/Denver:20200324T153000 DTEND;TZID=America/Denver:20200324T163000 DTSTAMP:20260819T205508Z SUMMARY:Stefano Filipazzi DESCRIPTION:Speaker: speaker\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2020-spring/ END:VEVENT BEGIN:VEVENT UID:20200331T153000-speaker@math.utah.edu DTSTART;TZID=America/Denver:20200331T153000 DTEND;TZID=America/Denver:20200331T163000 DTSTAMP:20260819T205508Z SUMMARY:Devlin Mallory DESCRIPTION:Speaker: speaker\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2020-spring/ END:VEVENT BEGIN:VEVENT UID:20200407T153000-speaker@math.utah.edu DTSTART;TZID=America/Denver:20200407T153000 DTEND;TZID=America/Denver:20200407T163000 DTSTAMP:20260819T205508Z SUMMARY:Sean Howe DESCRIPTION:Speaker: speaker\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2020-spring/ END:VEVENT BEGIN:VEVENT UID:20200414T153000-speaker@math.utah.edu DTSTART;TZID=America/Denver:20200414T153000 DTEND;TZID=America/Denver:20200414T163000 DTSTAMP:20260819T205508Z SUMMARY:Yoshinori Gongyo DESCRIPTION:Speaker: speaker\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2020-spring/ END:VEVENT BEGIN:VEVENT UID:20200421T153000-speaker@math.utah.edu DTSTART;TZID=America/Denver:20200421T153000 DTEND;TZID=America/Denver:20200421T163000 DTSTAMP:20260819T205508Z SUMMARY:Alicia Lamarche DESCRIPTION:Speaker: speaker\n\n LOCATION:LCB 222 URL:http://math.utah.edu/agseminar/2020-spring/ END:VEVENT END:VCALENDAR