Abstract
Recently Saha and Das [10] constructed partially balanced incomplete block (PBIB) designs of two and more associate classes by using confounded designs for 2 n factorials. Several new designs of two associate classes were obtained through those methods. This paper generalizes one of the earlier methods of construction to obtain several series ofT m -type (m≧2) PBIB designs, i.e., the designs havingm-dimensional triangular association schemes. Some more new designs of two associate classes (i.e.,T 2-type) are obtained through the generalized methods of construction.
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