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UID:20250919T023850EDT-461882AuFX@132.216.98.100
DTSTAMP:20250919T063850Z
DESCRIPTION:Hi\, everyone\,\n\n \n\nThe Mathematics & Statistics Graduate S
 tudent Seminar will convene again this week at 1:00pm on Friday\, March 15
 \, in the Main Lounge (Burnside 1025). As usual\, there will be pizza.\n\n
  \n\nThis week\, Florestan Brunck will talk to us about tilings\, aperiodi
 c tilings\, and undecidability:\n\n \n\nGiven finitely many different type
 s of tiles in the plane\, each in infinite supply\, can we juxtapose them 
 in such a way that they cover the entire plane without gaps? This problem 
 is known as the tiling problem and turns out to be unexpectedly difficult 
 — difficult enough that no algorithm can answer this question for us\, eve
 n for very simple families of tilings. The proof of the undecidability of 
 the tiling problem is a nifty reduction argument. More surprising perhaps 
 is the fact that the undecidability of the tiling problem implies the exis
 tence of aperiodic tilings\, which tesselate the plane only aperiodically.
  This talk will consist of the proof of the undecidability of the constrai
 ned tiling problem\, together with a mosaic of interesting facts about ape
 riodic tilings\, and in particular Penrose tilings. \n\n \n\nSee you all t
 here!\n\n \n\nAll graduate students are invited. As with all talks in the 
 graduate student seminar\, this talk will be accessible to all graduate st
 udents in math and stats. This seminar was made possible by funding from t
 he 9IÖÆ×÷³§Ãâ·Ñ Mathematics and Statistics Department and PGSS.\n
DTSTART:20190315T170000Z
DTEND:20190315T180000Z
LOCATION:Room 1025\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue
  Sherbrooke Ouest
SUMMARY:Mathematics & Statistics Graduate Student Seminar: tilings\, aperio
 dic tilings\, and undecidability
URL:/mathstat/channels/event/mathematics-statistics-gr
 aduate-student-seminar-tilings-aperiodic-tilings-and-undecidability-295383
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