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CATEGORIES:Geometric Group Theory (GGT) Seminar
SUMMARY:Stable commutator length on RAAGs - Nicolaus Heuer
  (University of Cambridge)
DTSTART;TZID=Europe/London:20210122T134500
DTEND;TZID=Europe/London:20210122T144500
UID:TALK155146AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/155146
DESCRIPTION:The stable commutator length scl(g) of an element 
 g in a group G measures the least complexity of a 
 surface to “fill” g. Stable commutator length on n
 on-abelian free groups is now fairly well understo
 od but some questions remain open: Which rational 
 numbers arise as scls? What is the distribution of
  scl for random elements? What is the gap for chai
 ns of scl?\nI will give a partial answer to all of
  these questions for right-angled Artin groups (RA
 AGs). If time permits\, I will also show that comp
 uting scl in RAAGs is (unlike in free groups) NP-h
 ard.\nThis is joint work with Lvzhou Chen.\n\n
LOCATION:Zoom https://maths-cam-ac-uk.zoom.us/j/95208706709
CONTACT:
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