Spectral characterization of a graph on the flags of the eleven point biplane

A. Blokhuis, A.E. Brouwer

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
81 Downloads (Pure)

Abstract

We characterize a 55-point graph by its spectrum $ 4^1, (-2)^{10}, (-1 \pm \sqrt{3})^{10}, ((3 \pm \sqrt{5})/2)^{12} $. No interlacing is used: examination of tr A^m for m = 7 together with study of the representation in the eigenspace for the eigenvalue -2 suffices.
Original languageEnglish
Pages (from-to)65-69
JournalDesigns, Codes and Cryptography
Volume65
Issue number1-2
DOIs
Publication statusPublished - 2012

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