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SUMMARY:Ronan Terpereau (Université de Bourgogne)
DTSTART:20211019T150000Z
DTEND:20211019T160000Z
DTSTAMP:20260423T040047Z
UID:ZAG/156
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/ZAG/156/">Re
 al structures on almost homogeneous varieties</a>\nby Ronan Terpereau (Uni
 versité de Bourgogne) as part of ZAG (Zoom Algebraic Geometry) seminar\n\
 n\nAbstract\nIn this talk\, we will be interested in the real structures o
 n the almost homogeneous varieties\; these are the complex algebraic varie
 ties X endowed with an action of a reductive algebraic group G such that G
  acts on X with a dense open orbit. We will see how to determine when a re
 al structure on X exists and\, if so\, how to describe and count all of th
 em. In particular\, we will try to illustrate our approach on two classica
 l families of almost homogeneous varieties: the horospherical varieties (w
 hich include toric manifolds and flag varieties) and the SL(2)-almost homo
 geneous threefolds (which include the Fano threefolds P3\, Q3\, V5\, and V
 22). This is a joint work with Lucy Moser-Jauslin (IMB\, Dijon).\n
LOCATION:https://researchseminars.org/talk/ZAG/156/
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