Completely regular designs
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William J. Martin
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Article
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1998
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John Wiley and Sons
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English
β 215 KB
We study a class of t-designs which enjoy a high degree of regularity. These are the subsets of vertices of the Johnson graph which are completely regular, in the sense of Delsarte [Philips Res. Reports Suppl. 10 (1973)]. After setting up the basic theory, we describe the known completely regular de