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UID:news2081@dmi.unibas.ch
DTSTAMP;TZID=Europe/Zurich:20261103T125338
DTSTART;TZID=Europe/Zurich:20261109T121500
SUMMARY:Bernoullis Tafelrunde: Michele Bianco (Università di Trento)
DESCRIPTION:Abstract [t3://file?uid=4293]:Rational homogeneous varieties G/
 P generalize projective spaces and Grassmannians\, and they are very simpl
 e objects from the birational point of view: they carry a transitive actio
 n of a semisimple group G\, hence they are smooth rational Fano varieties\
 , and in fact Mori dream spaces. Even so\, their quotients by natural toru
 s actions\, such as the action of a maximal torus of G\, turn out to be ha
 rd to understand. In this talk I will introduce the necessary background\,
  starting from algebraic groups and rational homogeneous varieties and mov
 ing on to GIT and Chow quotients. In the last part I will present the main
  results of recent joint work with L. Barban and L. E. Solá Conde on maxi
 mal geometric quotients of complete flag varieties.
X-ALT-DESC:<p><a href="t3://file?uid=4293">Abstract</a>:<br /><br />Rationa
 l homogeneous varieties G/P generalize projective spaces and Grassmannians
 \, and they are very simple objects from the birational point of view: the
 y carry a transitive action of a semisimple group G\, hence they are smoot
 h rational Fano varieties\, and in fact Mori dream spaces. Even so\, their
  quotients by natural torus actions\, such as the action of a maximal toru
 s of G\, turn out to be hard to understand. In this talk I will introduce 
 the necessary background\, starting from algebraic groups and rational hom
 ogeneous varieties and moving on to GIT and Chow quotients. In the last pa
 rt I will present the main results of recent joint work with L. Barban and
  L. E. Solá Conde on maximal geometric quotients of complete flag varieti
 es.</p>
DTEND;TZID=Europe/Zurich:20261109T130000
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