BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Rigidity of positive scalar curvature [MPIM]
DTSTART:20260723T113000Z
DTEND:20260723T130000Z
DTSTAMP:20260916T123400Z
UID:indico-event-1513@math-events.uni-bonn.de
DESCRIPTION:Speakers: Thomas Schick (Universität Göttingen)\n\nObersemin
 ar Differentialgeometrie\nWe discuss a classical problem in global Riemann
 ian geometry:Loosely speaking\, it asks: "how round can one make a given m
 anifold"?More concretely: if one avoids the obvious scaling trick: given a
  metric g with non-negative scalar curvature on a smooth manifold M\,can o
 ne find g' such that distances are not decreased when measured with g'inst
 aed of g\, but such that the scalar curvature increases?A classical result
  by Llarull states that this is not the case if g is the round metric on t
 he sphere S^n (n>1)\;Goette and Semmelmann generalize this to further clas
 ses of manifolds\, in particular symmetric spaces of compact type withnon-
 vanishing Euler characteristic.We discuss the possible approaches to study
  this question and a number of important generalizations/variations:a) the
  condition is purely metric: therefore also the conclusion should hold und
 er low assumptions on the regularity (this is joint work with Simone Cecch
 ini\, Bernhard Hanke\, Lukas Schoenlinnerb) certain instances where the ma
 nifold has Euler characteristic zero (but is not a sphere): this is joint 
 work with Georg Frenck\, Lukas Schoenlinner\, Thomas Tony.\n \n\nhttps://
 math-events.uni-bonn.de/event/1513/
LOCATION:MPIM\, Vivatsgasse\,  7 - Lecture Hall (Max Planck Institute for 
 Mathematics)
URL:https://math-events.uni-bonn.de/event/1513/
END:VEVENT
END:VCALENDAR