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:20260422T212901Z UID:Sputnik22/6 DESCRIPTION:Title: On Chisini theorems for covers of the projective plane\nby Victor Ku likov (Steklov Mathematical Institute) as part of Conference on Algebraic Geometry\n\n\nAbstract\nIn the talk\, it will be discussed the question wh en finite covers of the projective plane are uniquely determined by the l ocal data on the behavior of covers over the points of their branch curves .\n LOCATION:https://researchseminars.org/talk/Sputnik22/6/ END:VEVENT BEGIN:VEVENT SUMMARY:Constantin Shramov (Steklov Mathematical Institute\, NRU HSE) DTSTART:20220628T102000Z DTEND:20220628T112000Z DTSTAMP:20260422T212901Z UID:Sputnik22/7 DESCRIPTION:Title: Conic bundles\nby Constantin Shramov (Steklov Mathematical Institute \, NRU HSE) as part of Conference on Algebraic Geometry\n\n\nAbstract\nCon sider a conic bundle over a smooth incomplete curve $C$\, i.e. a smooth su rface $S$ with a proper surjective morphism to $C$ such that the push-forw ard of the structure sheaf of $S$ coincides with the structure sheaf of $C $\, and the anticanonical class of $S$ is\nample over $C$. I will tell abo ut a necessary and sufficient condition for the existence of an extension of this conic bundle to the completion of $C$. The talk is based on a join t work in progress with V. Vologodsky.\n LOCATION:https://researchseminars.org/talk/Sputnik22/7/ END:VEVENT BEGIN:VEVENT SUMMARY:Yuri Prokhorov (Steklov Mathematical Institute\, NRU HSE) DTSTART:20220628T124000Z DTEND:20220628T134000Z DTSTAMP:20260422T212901Z UID:Sputnik22/8 DESCRIPTION:Title: Singular Del Pezzo varieties\nby Yuri Prokhorov (Steklov Mathematica l Institute\, NRU HSE) as part of Conference on Algebraic Geometry\n\n\nAb stract\nA del Pezzo variety $X$ is a Fano variety whose anticanonical clas s has the form $-K_X=(n-1)A$\, where $A$ is an ample line bundle and $n$ i s the dimension of $X$. This is a higher dimensional analog of the notion of del Pezzo surfaces. I am going to discuss biregular and birational clas sifications of del Pezzo varieties admitting terminal singularities.\n\nTh e talk is based on a joint work with Alexander Kuznetsov.\n LOCATION:https://researchseminars.org/talk/Sputnik22/8/ END:VEVENT BEGIN:VEVENT SUMMARY:Valery Alexeev (University of Georgia) DTSTART:20220628T140000Z DTEND:20220628T150000Z DTSTAMP:20260422T212901Z UID:Sputnik22/9 DESCRIPTION:Title: Compact moduli spaces of $K3$ surfaces\nby Valery Alexeev (Universit y of Georgia) as part of Conference on Algebraic Geometry\n\n\nAbstract\nI will discuss several recent results\, most of them joint with Philip Enge l\, that relate functorial\, geometrically meaningful compactifications of moduli spaces of $K3$ surfaces with toroidal and semi-toroidal compactifi cations.\n LOCATION:https://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:20260422T212901Z 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 o f Conference on Algebraic Geometry\n\n\nAbstract\nThe Suslin exact sequenc e relates a part of the 3rd étale cohomology group to the corresponding t orsion subgroup in codimension two cycles. We prove a mixed characteristic version of this result.\n LOCATION:https://researchseminars.org/talk/Sputnik22/14/ END:VEVENT BEGIN:VEVENT SUMMARY:Valery Lunts (Indiana University Bloomington\, NRU HSE) DTSTART:20220630T102000Z DTEND:20220630T112000Z DTSTAMP:20260422T212901Z UID:Sputnik22/15 DESCRIPTION:Title: Some conjectures about LLV Lie algebra\, group of autoequivalences of t he derived category and monodromy\nby Valery Lunts (Indiana University Bloomington\, NRU HSE) as part of Conference on Algebraic Geometry\n\n\nA bstract\nI will discuss some recent work on the conjectural relation of th e group of autoequivalences of the derived category and the LLV Lie algebr a for (weak) CY varieties. Another conjecture (essentially due to Kontsevi ch) describes the relation of the above group to the monodromy of the mirr or symmetric family.\n LOCATION:https://researchseminars.org/talk/Sputnik22/15/ END:VEVENT BEGIN:VEVENT SUMMARY:Alexander Efimov (Steklov Mathematical Institute\, NRU HSE) DTSTART:20220630T124000Z DTEND:20220630T134000Z DTSTAMP:20260422T212901Z UID:Sputnik22/16 DESCRIPTION:Title: $K$-theory of inverse limits\nby Alexander Efimov (Steklov Mathemat ical Institute\, NRU HSE) as part of Conference on Algebraic Geometry\n\n\ nAbstract\nWe will recall the recent notion of a Mittag-Leffler inverse se quence of DG categories\, and sketch a proof that $K$-theory specturm of a suitably defined limit is identified with the inverse limit of $K$-theory spectra. This in particular applies to the category of nuclear modules on a formal scheme.\n LOCATION:https://researchseminars.org/talk/Sputnik22/16/ END:VEVENT BEGIN:VEVENT SUMMARY:Alexey Bondal (Steklov Mathematical Institute\, MIPT) DTSTART:20220630T140000Z DTEND:20220630T150000Z DTSTAMP:20260422T212901Z 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 Algebrai c Geometry\n\n\nAbstract\nWe will show that the derived category of $\\mat hcal O$-modules with coherent cohomology and the derived category of coher ent sheaves are not equivalent for a generic compact complex-analytic toru s of dimension $>2$. We will compare the algebraic structure of the two ca tegories.\n LOCATION:https://researchseminars.org/talk/Sputnik22/17/ END:VEVENT END:VCALENDAR