SummaryConstructions of three series of regular GD and semi-regular GD designs are given. Furthermore, a series of rectangular PBIB designs is constructed and particular cases of this series which reduce to PBIB designs with two associate classes are also provided.
SummaryTwo-associate class PBIB designs, having association schemes of GD or L2 types, are constructed by using patterned matrices and by methods of taking unions of sets of blocks.
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