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Regular Hadamard matrix, maximum excess and SBIBD. (English) Zbl 1027.05009
The authors construct new symmetric balanced incomplete block designs with parameters \(v = 4(u^2)\), \(k = 2(u^2)+u\), \(\lambda = (u^2)+u\), for many values of \(u.\)

MSC:
05B05 Combinatorial aspects of block designs
05B20 Combinatorial aspects of matrices (incidence, Hadamard, etc.)
62K10 Statistical block designs
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