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UID:news846@dmi.unibas.ch
DTSTAMP;TZID=Europe/Zurich:20190430T141302
DTSTART;TZID=Europe/Zurich:20190507T103000
SUMMARY:Seminar Algebra and Geometry: Yuri Prokhorov (Steklov Mathematical 
 Institute\, Moscow)
DESCRIPTION:A conic bundle f: X\\to S is a flat morphism of smooth varietie
 s whose  fibers are plane conics.  In this talk\, I will first discuss 
 application of  Sarkisov program to the rationality problem of algebraic 
 varieties having conic bundle structures. Then I concentrate on some spec
 ial\, so-called  tetragonal types of conic bundles\, which lie on the "
 boundary" between birationally rigid and non-rigid ones and are especiall
 y interesting for this reason.  The second part of the talk is based on 
 the joint work in progress with V. Shokurov.
X-ALT-DESC:A conic bundle f: X\\to S is a flat morphism of smooth varieties
  whose&nbsp\; fibers are plane conics.&nbsp\;&nbsp\;<br />In this talk\, I
  will first discuss application of&nbsp\; Sarkisov program to the rational
 ity problem of algebraic varieties having conic bundle structures.&nbsp\;<
 br />Then I concentrate on some special\, so-called&nbsp\;<i>&nbsp\;</i><i
 >tetragonal</i>&nbsp\;types of conic bundles\, which lie on the &quot\;bou
 ndary&quot\; between birationally rigid and non-rigid ones&nbsp\;and are e
 specially interesting for this reason.&nbsp\;&nbsp\;<br />The second part 
 of the talk is based on the joint work&nbsp\;in progress with V. Shokurov.
DTEND;TZID=Europe/Zurich:20190507T120000
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