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\iteman{io-port 05540860}
\itemau{Renteln, Paul}
\itemti{On the spectrum of the derangement graph.}
\itemso{Electron. J. Comb. 14, No. 1, Research Paper R82, 17 p. (2007).}
\itemab
Summary: We derive several interesting formulae for the eigenvalues of the derangement graph and use them to settle affirmatively a conjecture of Ku [{\it C. Y. Ku} and {\it T.W.H. Wong}, ``Intersecting families in the alternating group and direct product of symmetric groups'', Electron. J. Comb. 14, No. 1, Res. paper R25 (2007; Zbl 1111.05093)] regarding the least eigenvalue.
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\itemli{emis:journals/EJC/Volume\_14/Abstracts/v14i1r82.html}
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