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SUMMARY:Periodicity\, complexity and shifts. - Kra\, B (Northwestern Unive
 rsity)
DTSTART:20140617T133000Z
DTEND:20140617T143000Z
UID:TALK53016@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:A beautiful example of a global property being determined by a
  local one is the Morse-Hedlund Theorem\; it gives the relation between th
 e global property of periodicity for an infinite word in a finite alphabet
  and local information on the complexity of the word.  I will discuss high
 er dimensional versions of this problem\, and the use of local conditions 
 on complexity to determine global properties of the configuration\, and ap
 plications of this to the automorphism group of shifts.  This is joint wor
 k with Van Cyr.\n
LOCATION:Seminar Room 2\, Newton Institute Gatehouse
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