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DTSTART:20200308T070000
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URL:/combinatorics-and-optimization/events/algebraic-gr
 aph-theory-seminar-krystal-guo-4
SUMMARY:Algebraic Graph Theory Seminar - Krystal Guo
CLASS:PUBLIC
DESCRIPTION:Summary \n\nTITLE: Simple eigenvalues of graph\n\nSpeaker:\n K
 rystal Guo\n\nAffiliation:\n University of Amsterdam\n\nZoom:\n Contact So
 ffia Arnadottir\n\nABSTRACT:\n\nIf v is an eigenvector for eigenvalue λ o
 f a graph X and α is an\nautomorphism of X\, then α(v) is also an eigenv
 ector for λ. Thus it\nis rather exceptional for an eigenvalue of a vertex
 -transitive graph\nto be simple. We study cubic vertex-transitive graphs w
 ith a\nnon-trivial simple eigenvalue\, and discover remarkable connections
  to\narc-transitivity\, regular maps and Chebyshev polynomials.\n 
DTSTAMP:20250526T023439Z
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