Circulant weighing matrices of weight 2(2t) supercript stop
A weighing matrix of weight k is a square matrix M with entries 0, +/- 1 such that MMT = kI (n) . We study the case that M is a circulant and k = 2(2t) for some positive integer t. New structural results are obtained. Based on these results, we make a complete computer search for all circulant weighing matrices of order 16.
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