Non-Existence of Some Unsymmetrical Partially Balanced Incomplete Block Designs
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Publication:5725148
DOI10.4153/CJM-1963-068-8zbMath0116.11203MaRDI QIDQ5725148
Suresh K. Tharthare, S. S. Shrikhande, Damaraju Raghavarao
Publication date: 1963
Published in: Canadian Journal of Mathematics (Search for Journal in Brave)
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Quasi-symmetric designs related to the triangular graph, Non-derivable strongly regular graphs from quasi-symmetric designs, Parametric restrictions on quasi-symmetric designs, Conditions for the parameters of the block graph of quasi-symmetric designs, Conditions for singular incidence matrices, Association schemes of new types and necessary conditions for existence of regular and symmetrical PBIB designs with those association schemes, Some results on tactical configurations and non-existence of difference set solutions for certain symmetrical PBIB designs
