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SUMMARY:An introduction to real trees and pretrees - Jean Pierre Mutanguha
 \, Princeton University
DTSTART:20221214T141500Z
DTEND:20221214T151500Z
UID:TALK193810@talks.cam.ac.uk
CONTACT:Dr Rachael Boyd
DESCRIPTION:Real trees are geodesic spaces in which “triangles are tripo
 ds.” These geometric constructions can be used to encode dynamical prope
 rties of a surface homeomorphism or a free group automorphism. In this tal
 k\, I will define real trees and classify their isometries. Through exampl
 es\, I will show you how real trees arise naturally when studying surfaces
  and free groups. The talk will end with a brief discussion of real pretre
 es\; loosely speaking\, these are “trees without metrics.”
LOCATION:Centre for Mathematical Sciences\, MR13
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