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DTSTART:20240310T070000
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DTSTART:20231105T060000
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DTSTART;TZID=America/Toronto:20240530T140000
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URL:https://uwaterloo.ca/combinatorics-and-optimization/events/algebraic-en
 umerative-combinatorics-jette-gutzeit
SUMMARY:Algebraic & Enumerative Combinatorics - Jette Gutzeit
CLASS:PUBLIC
DESCRIPTION:TITLE: Introducing the interval poset associahedron\n\nSPEAKER:
 \n Jette Gutzeit\n\nAFFILIATION:\n University of Greifswald\n\nLOCATION:\n
  MC 5479\n\nThere will be a pre-seminar presenting relevant background at 
 the\nbeginning graduate level starting at 1pm.\n\nABSTRACT: Given a permu
 tation\, we define its interval poset to be the\nset of all intervals orde
 red by inclusion. In this framework\, a\n'tube' is a convex connected sub
 set\, while a 'tubing' denotes a\ncollection of tubes\, that are pairwise 
 either nested or disjoint. The\ninterval poset associahedron is a polytope
 \, whose faces correspond to\nproper tubes and whose vertices correspond t
 o maximal tubings of the\ninterval poset of a given permutation.\n\nIf we 
 start with a simple permutation\, the resulting interval poset\nassociahed
 ron will be isomorphic to the permutahedron. And if we\nconsider inverse p
 ermutations\, it turns out\, that they yield identical\nassociahedra.\n\nI
 f there is time\, I will discuss another order on permutations\, the\nBruh
 at order\, and compare it to the permutahedron.
DTSTAMP:20260403T082054Z
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