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UID:news933@dmi.unibas.ch
DTSTAMP;TZID=Europe/Zurich:20191004T195349
DTSTART;TZID=Europe/Zurich:20191008T103000
SUMMARY:Seminar Algebra and Geometry: Christian Urech (EPFL)
DESCRIPTION:Julie Déserti showed that every automorphism of the plane Crem
 ona group is inner up to a field automorphism of the base-field. In this t
 alk we generalize this result to Cremona groups of arbitrary rank\, howeve
 r\, only under the additional restriction that the automorphisms are also 
 homeomorphisms with respect to the Zariski or the Euclidean topology on th
 e Cremona group. We will consider similar questions for groups of polynomi
 al automorphisms and groups of birational diffeomorphisms. This is joint w
 ork with Susanna Zimmermann.
X-ALT-DESC: Julie Déserti showed that every automorphism of the plane Crem
 ona group is inner up to a field automorphism of the base-field. In this t
 alk we generalize this result to Cremona groups of arbitrary rank\, howeve
 r\, only under the additional restriction that the automorphisms are also 
 homeomorphisms with respect to the Zariski or the Euclidean topology on th
 e Cremona group. We will consider similar questions for groups of polynomi
 al automorphisms and groups of birational diffeomorphisms. This is joint w
 ork with Susanna Zimmermann.
DTEND;TZID=Europe/Zurich:20191008T120000
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