![Strong primeness for equivalence relations arising from Zariski dense subgroups](/media/cache/video_light/uploads/video/Capture%20d%E2%80%99%C3%A9cran%202024-06-14%20%C3%A0%2010.01.07.png)
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Strong primeness for equivalence relations arising from Zariski dense subgroups
De Cyril Houdayer
![Non tame cocycle rigidity above affine unipotent abelian actions on the torus](/media/cache/video_light/uploads/video/Capture%20d%E2%80%99%C3%A9cran%202024-06-13%20%C3%A0%2010.09.15.png)
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Non tame cocycle rigidity above affine unipotent abelian actions on the torus
De Bassam Fayad
Apparaît dans la collection : Complex Geometry, Dynamical Systems and Foliation Theory / Géométrie complexe, systèmes dynamiques et théorie de feuilletages
The automorphism group of a compact Kähler manifold satisfies Tits alternative: any subgroup either admits a solvable subgroup of finite index or contains a free non-abelian group of two generators (Campana-WangZhang). In the first case, this group cannot be too big. Some algebraic (rational) manifolds with special automorphisms admit infinitely many nonequivalent real forms. This talk is based on my (old and recent) works with F. Hu, H.-Y. Lin, V.-A. Nguyen, K. Oguiso, N. Sibony, X. Yu, D.-Q. Zhang.