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The excess problem and some excess inequivalent matrices of order 32. (English) Zbl 0941.05015
Summary: Let \(4n\) be the order of an Hadamard matrix. It is shown that there is a regular complex Hadamard matrix of order \(8n^2\). Five classes of excess-inequivalent Hadamard matrices of order \(32\) are introduced.

MSC:
05B20 Combinatorial aspects of matrices (incidence, Hadamard, etc.)
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