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PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:About a couple of global invariants of quaternionic hyperbolic man
 ifolds
DTSTART:20151028T151500
DTEND:20151028T173000
DTSTAMP:20260921T140754Z
UID:1aa064c8bd23ce85feaf3e5734b074467d0b09ed607c7508878fe0ee
CATEGORIES:Conferences - Seminars
DESCRIPTION:Zoé Philippe (Nantes)\nIt has been known since the end of the
  60's (with the work of Kazdan and Margulis and Wang)\, that any locally s
 ymmetric manifold or orbifold of non-compact type contains an embedded bal
 l of radius r(G) depending only on the isometry group G of its universal c
 over. This implies in particular the existence of a constant bounding the 
 volume of the quotient of a given symmetric space by below. Therefore\, if
  one fixes such a space\, (at least!) two questions arise naturally: deriv
 e explicitly this maximal radius r(G) -or at least bound it- and exhibit t
 he minimal volume of its quotients together with the lattices that realize
  it.\nIn real rank 1\, the symmetric spaces of non-compact type are the \
 nhyperbolic spaces on \\R\, \\C\, and on the quaternions \\H (and the Cayl
 ey plane). In this talk\, I will discuss a couple of extremal properties o
 f the quotients of the quaternionic hyperbolic space.\nNote :  An introdu
 ctory talk will be given by Thomas Zwahlen at 15:15  and the Speaker's ta
 lk per se will start at 16:30
LOCATION:CM-010
STATUS:CONFIRMED
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