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On a class of quasi-symmetric designs. (English) Zbl 1110.05018

Summary: We show that for each positive integer \(t\), for which there is a skew-type Hadamard matrix of order \(4t\), there is a quasi-symmetric \(((4t-1)^2,(4t-1)(2t-1),t(4t-3))\) design.

MSC:

05B20 Combinatorial aspects of matrices (incidence, Hadamard, etc.)
05B05 Combinatorial aspects of block designs

Keywords:

Hadamard matrix
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