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DTSTART:20260308T070000
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DTSTART:20251102T060000
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DTSTART;TZID=America/Toronto:20260312T143000
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URL:https://uwaterloo.ca/combinatorics-and-optimization/events/algebraic-en
 umerative-combinatorics-stephan-pfannerer
SUMMARY:Algebraic & Enumerative Combinatorics - Stephan\nPfannerer-Rotation
 -invariant web bases from hourglass plabic graphs
CLASS:PUBLIC
DESCRIPTION:SPEAKER:\n Stephan Pfannerer\n\nAFFILIATION:\n University of Wa
 terloo\n\nLOCATION:\n MC 5417\n\nABSTRACT: \n\nIn 1995\, Kuperberg introd
 uced a remarkable collection of trivalent web\nbases which encode tensor i
 nvariants of U_q(sl_3). Extending these\nbases to general sl_r has been an
  open problem ever since. We present\na solution to the r=4 case by introd
 ucing hourglass plabic graphs\, a\nnew generalization of Postnikov's plabi
 c graphs. Joint work with\nChristian Gaetz\, Oliver Pechenik\, Jessica Str
 iker and Joshua Swanson. \nThere will be a pre-seminar presenting relevant
  background at the\nbeginning graduate level starting at 1:30pm in MC 5417
 .\nThere will be a pre-seminar presenting relevant background at the\nbegi
 nning graduate level starting at 1:30pm in MC 5417.
DTSTAMP:20260410T223051Z
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