A characterization of skew Hadamard matrices and doubly regular tournaments

Details A characterization of skew Hadamard matrices and doubly regular tournaments A characterization of skew Hadamard matrices and doubly regular tournaments

2012-02-24

arxiv.org/abs/1202.5374v1

Mathematics

Combinatorics

9 pages

Scientific paper

We give a new characterization of skew Hadamard matrices of size $n$ in terms
of the data of the spectra of tournaments of size $n-2$.

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