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All 2-(21, 7, 3) designs are residual - MaRDI portal

All 2-(21, 7, 3) designs are residual

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Publication:1281152

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zbMath0926.05006MaRDI QIDQ1281152

Spence, Edward

Publication date: 15 June 1999

Published in: Bulletin of the Belgian Mathematical Society - Simon Stevin (Search for Journal in Brave)

zbMATH Keywords

classification block designs isomorphism types residual designs quasi-residual symmetric designs

Mathematics Subject Classification ID

Combinatorial aspects of block designs (05B05)

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