A four-class subscheme of the association scheme coming from the action of P G L (2, 4f)

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Abstract

Let Ω denote the set of two-element subsets of the projective line PG(1, q), where q = 2e, e > 1. The character table of the association scheme X (PGL(2, q), Ω) is calculated. Then by using this character table, we prove that the conjectured subscheme of de Caen and van Dam is indeed an association scheme.

Original languageEnglish
Pages (from-to)121-129
Number of pages9
JournalEuropean Journal of Combinatorics
Volume23
Issue number1
DOIs
Publication statusPublished - 2002

ASJC Scopus subject areas

  • Discrete Mathematics and Combinatorics

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