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VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Geometry and dynamics seminar: Extension of Lorentzian tori endowe
 d with a Killing field
DTSTART:20150527T161500
DTEND:20150527T173000
DTSTAMP:20260406T102140Z
UID:4d0553ba511e6be2add0a568487e4ff45f95f13369ea68debf5514fd
CATEGORIES:Conferences - Seminars
DESCRIPTION:Pierre Mounoud (University of Bordeaux 1 - EU)\nDuring this ta
 lk we will investigate Lorentzian tori $(T\,g)$  admitting a Killing fiel
 d $X$ such that  $g(X\,X)$ vanishes and is not constant (the non elementa
 ry case). For example a Clifton-Pohl torus ie the quotient of $(\\mathbf R
 ^2\\setminus \\{0\\}\, \\frac{2 dx dy}{x^2+y^2}$ by an homothety. Such a t
 orus is never geodesically complete\, the best way to see it is probably t
 o construct non trivial extensions of its  universal cover. We will see t
 hat among these extensions there always exists one all of whose lightlike 
 geodesics are complete and that in the analytical setting this extension i
 s unique.
LOCATION:GC C3 30 http://plan.epfl.ch/?zoom=20&recenter_y=5864214.51967&re
 center_x=730902.15996&layerNodes=fonds\,batiments\,labels\,information\,pa
 rkings_publics\,arrets_metro\,transports_publics&floor=3&q=GC_C3%2030
STATUS:CONFIRMED
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