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DTSTART:20240310T070000
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DTSTART:20231105T060000
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DTSTART;TZID=America/Toronto:20240618T150000
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URL:https://uwaterloo.ca/combinatorics-and-optimization/events/graphs-and-m
 atroids-seminar-thomas-lesgourgues
SUMMARY:Graphs and Matroids Seminar - Thomas Lesgourgues
CLASS:PUBLIC
DESCRIPTION:TITLE: Ramsey with purple edges\n\nSPEAKER:\n Thomas Lesgourgu
 es\n\nAFFILIATION:\n University of Waterloo\n\nLOCATION:\n MC 5479\n\nABST
 RACT: Motivated by a question of David Angell\, we study a variant\nof Ra
 msey numbers where some edges are coloured with both red and blue\ncolours
 \, (i.e. are called ‘purple’ edges). Specifically\, we are\ninterested
  in the largest number g = g(s\, t\, n)\, for some s and t and\nn < R(s\, 
 t)\, such that there exists a red-blue-purple colouring of Kn\nwith g purp
 le edges\, without a red-purple Ks and without a blue-purple\nKt. We deter
 mine g asymptotically for a large family of parameters.\nThe talk will be 
 introductory in nature. Since the concept of\ndouble-coloured edges is new
  in this context\, there is a plethora of\nopen questions. Joint work with
  Anita Liebenau and Nye Taylor.
DTSTAMP:20260403T083015Z
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