Circulant matrices with orthogonal rows and off-diagonal entries of absolute value $1$

29 Feb 2020 Contreras Daniel Uzcátegui Goyeneche Dardo Turek Ondřej Václavíková Zuzana

It is known that a real symmetric circulant matrix with diagonal entries $d\geq0$, off-diagonal entries $\pm1$ and orthogonal rows exists only of order $2d+2$ (and trivially of order $1$) [Turek and Goyeneche 2019]. In this paper we consider a complex Hermitian analogy of those matrices... (read more)

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