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On designs with intersection numbers 0 and 2. (English) Zbl 0636.05015

A complete classification is given for quasi-symmetric design which have intersection numbers 0 and 2 and which satisfy certain conditions concerning sub-configurations. It is also proved that if a biplane \(B(k)\) has characteristic 3 then \(k\) is divisible by 3 and the number of points of the biplane is even.
Reviewer: V. C. Mavron

MSC:

05B30 Other designs, configurations
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References:

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