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SUMMARY:Olivier Debarre (Universite Paris 7)
DTSTART:20201222T090000Z
DTEND:20201222T100000Z
DTSTAMP:20260422T212900Z
UID:Iskovskikh2020/1
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/Iskovskikh20
 20/1/">Gushel–Mukai varieties with many symmetries and an explicit irrat
 ional Gushel–Mukai threefold</a>\nby Olivier Debarre (Universite Paris 7
 ) as part of Iskovskikh conference\n\n\nAbstract\nWe construct an explicit
    complex  smooth Fano threefold with Picard number 1\,  index 1\, and de
 gree 10 (also known as a Gushel--Mukai threefold) and prove that it is not
  rational by showing that its intermediate Jacobian has a faithfull\n${\\r
 m PSL}(2\,{\\bf F}_{11}) $-action. Along the way\, we construct Gushel--Mu
 kai varieties of various dimensions with  rather large (finite) automorphi
 sm groups.\nThe starting point  of all these constructions is an EPW sexti
 c with a faithful ${\\rm PSL}(2\,{\\bf F}_{11}) $-action discovered  by Gi
 ovanni Mongardi in his thesis in 2013 and all this is joint work with him.
 \n
LOCATION:https://researchseminars.org/talk/Iskovskikh2020/1/
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BEGIN:VEVENT
SUMMARY:Alexander Pukhlikov (University of Liverpool)
DTSTART:20201222T103000Z
DTEND:20201222T113000Z
DTSTAMP:20260422T212900Z
UID:Iskovskikh2020/2
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/Iskovskikh20
 20/2/">Rationally connected rational double covers of primitive Fano varie
 ties</a>\nby Alexander Pukhlikov (University of Liverpool) as part of Isko
 vskikh conference\n\n\nAbstract\nWe show that for a Zariski general hypers
 urface $V$ of degree $M+1$ in ${\\mathbb P}^{M+1}$ for $M\\geqslant 5$ the
 re are no Galois rational covers $X\\dashrightarrow V$ with an abelian Gal
 ois group\, where $X$ is a rationally connected variety. In particular\, t
 here are no rational maps $X\\dashrightarrow V$ of degree 2 with $X$ ratio
 nally connected. This fact is true for many other families of primitive Fa
 no varieties as well and motivates a conjecture on absolute rigidity of pr
 imitive Fano varieties.\n
LOCATION:https://researchseminars.org/talk/Iskovskikh2020/2/
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BEGIN:VEVENT
SUMMARY:Alessio Corti (Imperial Colledge London)
DTSTART:20201222T123000Z
DTEND:20201222T133000Z
DTSTAMP:20260422T212900Z
UID:Iskovskikh2020/3
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/Iskovskikh20
 20/3/">Mori fibred Calabi-Yau pairs birational to (P3\, quartic surface)</
 a>\nby Alessio Corti (Imperial Colledge London) as part of Iskovskikh conf
 erence\n\n\nAbstract\n(Work with Araujo and Massarenti.)\nWe classify Mori
  fibred Calabi-Yau pairs in the title when the surface has an $A_1$ or $A_
 2$ singularity.\n
LOCATION:https://researchseminars.org/talk/Iskovskikh2020/3/
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BEGIN:VEVENT
SUMMARY:Igor Dolgachev (University of Michigan)
DTSTART:20201222T140000Z
DTEND:20201222T150000Z
DTSTAMP:20260422T212900Z
UID:Iskovskikh2020/4
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/Iskovskikh20
 20/4/">Automorphisms of Coble surfaces</a>\nby Igor Dolgachev (University 
 of Michigan) as part of Iskovskikh conference\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/Iskovskikh2020/4/
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