Quasi-symmetric designs with the difference of block intersection numbers two (Q629932)
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scientific article; zbMATH DE number 5864183
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Quasi-symmetric designs with the difference of block intersection numbers two |
scientific article; zbMATH DE number 5864183 |
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Quasi-symmetric designs with the difference of block intersection numbers two (English)
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10 March 2011
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This paper considers 2-designs with two intersection numbers, which is called quasi-symmetric designs. It is shown that if \(D(v, b, r, k, \lambda)\) is a quasi-symmetric design with intersection numbers \(x\) and \(x+2\), then either \(\lambda = x+1\) or \(x+2\) with exceptions listed in a Table, or a complement design of these designs.
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2-design
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quasi-symmetric design
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