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DTSTART;TZID=America/Toronto:20230925T113000
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URL:https://uwaterloo.ca/combinatorics-and-optimization/events/algebraic-gr
 aph-theory-daniel-gromada
SUMMARY:Algebraic Graph Theory - Daniel Gromada
CLASS:PUBLIC
DESCRIPTION:TITLE: Quantum symmetries of Hadamard matrices\n\nSPEAKER:\n Da
 niel Gromada\n\nAFFILIATION:\n Czech Technical University in Prague\n\nLOC
 ATION:\n Please contact Sabrina Lato for Zoom link\n\nABSTRACT: The main
  purpose of this talk is to explain the idea behind\nthe main results of a
  recent article arXiv:2210.02047 about quantum\nsymmetries of Hadamard mat
 rices. First\, we recall the notion of\nquantum symmetries from the viewpo
 int of quantum groups as well as\ndiagrammatic categories. On the example 
 of a finite (quantum) space\,\nwe show\, how the diagrammatic approach can
  be used to prove that all\nfinite spaces (of size at least four) have qua
 ntum symmetries and all\nfinite quantum spaces of a given size are mutuall
 y quantum isomorphic.\nThe same technique is used to show analogous result
 s for Hadamard\nmatrices. Finally\, we would like to list a couple of ques
 tions and\nresearch suggestions related to this topic.
DTSTAMP:20260403T023844Z
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