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SUMMARY:Combinations of Non-Archimedean Discrete Groups
DTSTART:20261109T150000Z
DTEND:20261109T161500Z
DTSTAMP:20261029T050600Z
UID:indico-event-17587@indico.math.cnrs.fr
CONTACT:cecile@ihes.fr
DESCRIPTION:Speakers: Konstantinos Tsouvalas (Jagiellonian University)\n\n
  Chatterji and Venkataramana\, motivated by Nori's problem\, asked for a 
 real algebraic semisimple Lie group G and a simple Lie subgroup H of G\, w
 hether a Zariski-dense discrete subgroup of G\, intersecting H in a lattic
 e\, is itself a lattice in G. After discussing what is known related to th
 is question and Nori's problem\, we will address a similar version of this
  question for the k-points of semisimple groups defined over a non-Archime
 dean local field k\, and provide examples for which a positive answer fail
 s. This is based on a combination theorem for discrete subgroups of matrix
  groups over discretely valued fields. We will also discuss a construction
  of non-Fuchsian hyperbolic groups that quasi-isometrically embed as subgr
 oups of matrix groups over a discretely valued field. \n\nhttps://indico.
 math.cnrs.fr/event/17587/
LOCATION:Amphithéâtre Léon Motchane (IHES)
URL:https://indico.math.cnrs.fr/event/17587/
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