Three-Class Association Schemes

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Abstract

We study (symmetric) three-class association schemes.The graphs with four distinct eigenvalues which are one of the relations of such a scheme are characterized.We give an overview of most known constructions, and obtain necessary conditions for existence.A list of feasible parameter sets on at most 100 vertices is generated.
Original languageEnglish
Place of PublicationTilburg
PublisherOperations research
Number of pages36
Volume744
Publication statusPublished - 1997

Publication series

NameFEW Research Memorandum
Volume744

Keywords

  • wage differentials
  • international trade

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