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About $CW(512,16^2)$

Definitions: A weighing matrix $W = W(n,k)$ with weight $k$ is a square matrix of order $n$ and entries $w_{ij}$ in $\{0, \pm 1\}$ such that $WW^T=kI$, where $I$ is the identity matrix. A circulant ...
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5 votes
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On the half-skew-centrosymmetric Hadamard matrices

Definition 1: A Hadamard matrix is an $n\times n$ matrix $H$ whose entries are either $1$ or $-1$ and whose rows are mutually orthogonal. Definition 2: A matrix $A$ is half-skew-centrosymmetric if ...
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