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DTSTART:20210314T070000
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DTSTART:20211107T060000
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DTSTART;TZID=America/Toronto:20220131T113000
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URL:https://uwaterloo.ca/combinatorics-and-optimization/events/algebraic-gr
 aph-theory-seminar-steve-butler
SUMMARY:Algebraic Graph Theory Seminar - Steve Butler
CLASS:PUBLIC
DESCRIPTION:TITLE: Hadamard diagonalizable graphs of small order\n\nSpeake
 r:\n Steve Butler\n\nAffiliation:\n Iowa State University\n\nZoom:\n Conta
 ct Sabrina Lato\n\nABSTRACT:\n\nA graph whose Laplacian matrix has a full 
 set of eigenvectors with\nentries in {1\,-1} is said to be Hadamard diagon
 alizable (i.e. there\nexists a Hadamard matrix which diagonalizes the Lapl
 acian matrix). We\ndemonstrate that the only diagonalizable graphs on n=8k
 +4 vertices are\nK_n and K_{n/2\,n/2}.
DTSTAMP:20260405T102034Z
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