BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Victor Kulikov (Steklov Mathematical Institute) DTSTART:20220628T090000Z DTEND:20220628T100000Z DTSTAMP:20260404T095500Z UID:Sputnik22/6 DESCRIPTION:Title: On Chisini theorems for covers of the projective plane\nby Vi ctor Kulikov (Steklov Mathematical Institute) as part of Conference on Alg ebraic Geometry\n\n\nAbstract\nIn the talk\, it will be discussed the ques tion when finite covers of the projective plane are uniquely determined b y the local data on the behavior of covers over the points of their branch curves.\n LOCATION:https://stable.researchseminars.org/talk/Sputnik22/6/ END:VEVENT BEGIN:VEVENT SUMMARY:Constantin Shramov (Steklov Mathematical Institute\, NRU HSE) DTSTART:20220628T102000Z DTEND:20220628T112000Z DTSTAMP:20260404T095500Z UID:Sputnik22/7 DESCRIPTION:Title: Conic bundles\nby Constantin Shramov (Steklov Mathematical In stitute\, NRU HSE) as part of Conference on Algebraic Geometry\n\n\nAbstra ct\nConsider a conic bundle over a smooth incomplete curve $C$\, i.e. a sm ooth surface $S$ with a proper surjective morphism to $C$ such that the pu sh-forward of the structure sheaf of $S$ coincides with the structure shea f of $C$\, and the anticanonical class of $S$ is\nample over $C$. I will t ell about a necessary and sufficient condition for the existence of an ext ension of this conic bundle to the completion of $C$. The talk is based on a joint work in progress with V. Vologodsky.\n LOCATION:https://stable.researchseminars.org/talk/Sputnik22/7/ END:VEVENT BEGIN:VEVENT SUMMARY:Yuri Prokhorov (Steklov Mathematical Institute\, NRU HSE) DTSTART:20220628T124000Z DTEND:20220628T134000Z DTSTAMP:20260404T095500Z UID:Sputnik22/8 DESCRIPTION:Title: Singular Del Pezzo varieties\nby Yuri Prokhorov (Steklov Math ematical Institute\, NRU HSE) as part of Conference on Algebraic Geometry\ n\n\nAbstract\nA del Pezzo variety $X$ is a Fano variety whose anticanonic al class has the form $-K_X=(n-1)A$\, where $A$ is an ample line bundle an d $n$ is the dimension of $X$. This is a higher dimensional analog of the notion of del Pezzo surfaces. I am going to discuss biregular and biration al classifications of del Pezzo varieties admitting terminal singularities .\n\nThe talk is based on a joint work with Alexander Kuznetsov.\n LOCATION:https://stable.researchseminars.org/talk/Sputnik22/8/ END:VEVENT BEGIN:VEVENT SUMMARY:Valery Alexeev (University of Georgia) DTSTART:20220628T140000Z DTEND:20220628T150000Z DTSTAMP:20260404T095500Z UID:Sputnik22/9 DESCRIPTION:Title: Compact moduli spaces of $K3$ surfaces\nby Valery Alexeev (Un iversity of Georgia) as part of Conference on Algebraic Geometry\n\n\nAbst ract\nI will discuss several recent results\, most of them joint with Phil ip Engel\, that relate functorial\, geometrically meaningful compactificat ions of moduli spaces of $K3$ surfaces with toroidal and semi-toroidal com pactifications.\n LOCATION:https://stable.researchseminars.org/talk/Sputnik22/9/ END:VEVENT BEGIN:VEVENT SUMMARY:Ivan Panin (St. Petersburg Department of the Steklov Mathematical Institute) DTSTART:20220630T090000Z DTEND:20220630T100000Z DTSTAMP:20260404T095500Z UID:Sputnik22/14 DESCRIPTION:Title: On Suslin's exact sequence in mixed characteristic\nby Ivan Panin (St. Petersburg Department of the Steklov Mathematical Institute) as part of Conference on Algebraic Geometry\n\n\nAbstract\nThe Suslin exact sequence relates a part of the 3rd étale cohomology group to the correspo nding torsion subgroup in codimension two cycles. We prove a mixed charact eristic version of this result.\n LOCATION:https://stable.researchseminars.org/talk/Sputnik22/14/ END:VEVENT BEGIN:VEVENT SUMMARY:Valery Lunts (Indiana University Bloomington\, NRU HSE) DTSTART:20220630T102000Z DTEND:20220630T112000Z DTSTAMP:20260404T095500Z UID:Sputnik22/15 DESCRIPTION:Title: Some conjectures about LLV Lie algebra\, group of autoequivalenc es of the derived category and monodromy\nby Valery Lunts (Indiana Uni versity Bloomington\, NRU HSE) as part of Conference on Algebraic Geometry \n\n\nAbstract\nI will discuss some recent work on the conjectural relatio n of the group of autoequivalences of the derived category and the LLV Lie algebra for (weak) CY varieties. Another conjecture (essentially due to K ontsevich) describes the relation of the above group to the monodromy of t he mirror symmetric family.\n LOCATION:https://stable.researchseminars.org/talk/Sputnik22/15/ END:VEVENT BEGIN:VEVENT SUMMARY:Alexander Efimov (Steklov Mathematical Institute\, NRU HSE) DTSTART:20220630T124000Z DTEND:20220630T134000Z DTSTAMP:20260404T095500Z UID:Sputnik22/16 DESCRIPTION:Title: $K$-theory of inverse limits\nby Alexander Efimov (Steklov M athematical Institute\, NRU HSE) as part of Conference on Algebraic Geomet ry\n\n\nAbstract\nWe will recall the recent notion of a Mittag-Leffler inv erse sequence of DG categories\, and sketch a proof that $K$-theory spectu rm of a suitably defined limit is identified with the inverse limit of $K$ -theory spectra. This in particular applies to the category of nuclear mod ules on a formal scheme.\n LOCATION:https://stable.researchseminars.org/talk/Sputnik22/16/ END:VEVENT BEGIN:VEVENT SUMMARY:Alexey Bondal (Steklov Mathematical Institute\, MIPT) DTSTART:20220630T140000Z DTEND:20220630T150000Z DTSTAMP:20260404T095500Z UID:Sputnik22/17 DESCRIPTION:Title: Two derived categories of a generic complex torus\nby Alexey Bondal (Steklov Mathematical Institute\, MIPT) as part of Conference on A lgebraic Geometry\n\n\nAbstract\nWe will show that the derived category of $\\mathcal O$-modules with coherent cohomology and the derived category o f coherent sheaves are not equivalent for a generic compact complex-analyt ic torus of dimension $>2$. We will compare the algebraic structure of the two categories.\n LOCATION:https://stable.researchseminars.org/talk/Sputnik22/17/ END:VEVENT END:VCALENDAR