D-optimal designs and group divisible de
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Hiroki Tamura
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Article
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2006
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John Wiley and Sons
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English
β 128 KB
## Abstract We obtain new conditions on the existence of a square matrix whose Gram matrix has a block structure with certain properties, including Dβoptimal designs of order $n\equiv 3 \pmod 4$, and investigate relations to group divisible designs. We also find a matrix with large determinant for