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SUMMARY: Irrational Variants of Thompson's Group F - Nick Winstone\, Royal
  Holloway\, University of London
DTSTART:20191129T150000Z
DTEND:20191129T160000Z
UID:TALK131095@talks.cam.ac.uk
CONTACT:Liam Jolliffe
DESCRIPTION:*Abstract:* We introduce Thompson's groups F\, T\, and V. An e
 lement of F can be defined as the affine interpolation of two regular subd
 ivisions of the unit interval.  We define regular subdivisions associated 
 with subdivision polynomials and determine which regular subdivisions can 
 be used to create the elements of the groups  F_τ with τ an algebraic in
 teger. By adapting the work of S. Cleary and J. Brown\, we find that for s
 ubdivision polynomials of degree 2\, the subdivision polynomials must be P
 isot polynomials.\n
LOCATION:CMS\, MR13
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