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SUMMARY:Olivier Debarre (Universite Paris 7)
DTSTART:20201222T090000Z
DTEND:20201222T100000Z
DTSTAMP:20260404T095625Z
UID:Iskovskikh2020/1
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/Iskov
 skikh2020/1/">Gushel–Mukai varieties with many symmetries and an explici
 t irrational Gushel–Mukai threefold</a>\nby Olivier Debarre (Universite 
 Paris 7) as part of Iskovskikh conference\n\n\nAbstract\nWe construct an e
 xplicit   complex  smooth Fano threefold with Picard number 1\,  index 1\,
  and degree 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${\\rm PSL}(2\,{\\bf F}_{11}) $-action. Along the way\, we construct Gus
 hel--Mukai varieties of various dimensions with  rather large (finite) aut
 omorphism groups.\nThe starting point  of all these constructions is an EP
 W sextic with a faithful ${\\rm PSL}(2\,{\\bf F}_{11}) $-action discovered
   by Giovanni Mongardi in his thesis in 2013 and all this is joint work wi
 th him.\n
LOCATION:https://stable.researchseminars.org/talk/Iskovskikh2020/1/
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BEGIN:VEVENT
SUMMARY:Alexander Pukhlikov (University of Liverpool)
DTSTART:20201222T103000Z
DTEND:20201222T113000Z
DTSTAMP:20260404T095625Z
UID:Iskovskikh2020/2
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/Iskov
 skikh2020/2/">Rationally connected rational double covers of primitive Fan
 o varieties</a>\nby Alexander Pukhlikov (University of Liverpool) as part 
 of Iskovskikh conference\n\n\nAbstract\nWe show that for a Zariski general
  hypersurface $V$ of degree $M+1$ in ${\\mathbb P}^{M+1}$ for $M\\geqslant
  5$ there are no Galois rational covers $X\\dashrightarrow V$ with an abel
 ian Galois group\, where $X$ is a rationally connected variety. In particu
 lar\, there are no rational maps $X\\dashrightarrow V$ of degree 2 with $X
 $ rationally connected. This fact is true for many other families of primi
 tive Fano varieties as well and motivates a conjecture on absolute rigidit
 y of primitive Fano varieties.\n
LOCATION:https://stable.researchseminars.org/talk/Iskovskikh2020/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alessio Corti (Imperial Colledge London)
DTSTART:20201222T123000Z
DTEND:20201222T133000Z
DTSTAMP:20260404T095625Z
UID:Iskovskikh2020/3
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/Iskov
 skikh2020/3/">Mori fibred Calabi-Yau pairs birational to (P3\, quartic sur
 face)</a>\nby Alessio Corti (Imperial Colledge London) as part of Iskovski
 kh conference\n\n\nAbstract\n(Work with Araujo and Massarenti.)\nWe classi
 fy Mori fibred Calabi-Yau pairs in the title when the surface has an $A_1$
  or $A_2$ singularity.\n
LOCATION:https://stable.researchseminars.org/talk/Iskovskikh2020/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Igor Dolgachev (University of Michigan)
DTSTART:20201222T140000Z
DTEND:20201222T150000Z
DTSTAMP:20260404T095625Z
UID:Iskovskikh2020/4
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/Iskov
 skikh2020/4/">Automorphisms of Coble surfaces</a>\nby Igor Dolgachev (Univ
 ersity of Michigan) as part of Iskovskikh conference\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/Iskovskikh2020/4/
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