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DTSTART:20250309T070000
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DTSTART;TZID=America/Toronto:20251208T113000
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URL:https://uwaterloo.ca/combinatorics-and-optimization/events/algebraic-gr
 aph-theory-sarah-bockting-conrad-tridiagonal
SUMMARY:Algebraic Graph Theory-Sarah Bockting-Conrad-Tridiagonal pairs of\n
 Racah type and their associated objects
CLASS:PUBLIC
DESCRIPTION:SPEAKER:\n Sarah Bockting-Conrad\n\nAFFILIATION: \n\nDePaul Uni
 versity\n\nLOCATION:\n Please contact Sabrina Lato for Zoom link.\n\nABS
 TRACT: In this talk\, we consider a linear algebraic object known\nas a t
 ridiagonal pair which arises naturally in the context of\nQ-polynomial dis
 tance-regular graphs. We will focus on a special class\nof tridiagonal pai
 rs said to have Racah type. Given a tridiagonal pair\nof Racah type\, we a
 ssociate with it several linear transformations\nwhich act on the underlyi
 ng vector space in an attractive manner and\ndiscuss their relationships w
 ith one another. In an earlier work\, we\nintroduced the double lowering o
 perator Ψ for a tridiagonal pair. In\nthis talk\, we will explore this do
 uble lowering map further under the\nassumption that our tridiagonal pair 
 has Racah type and will use the\ndouble lowering map to obtain new relatio
 ns involving the operators\nassociated with two oriented versions of our t
 ridiagonal pair.
DTSTAMP:20260402T170933Z
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