On a result of bose and shrikhande
Necessary and sufficient conditions are given for the extendability of a regular 2-component pairwise balanced design (PB2-design) to a balanced incomplete block design. This gives an alternative non graph-theoretic proof of a result of R.C. Bose and S.S. Shrikhande, showing extendability of a PB2-design with certain parameters to a projective plane of even order q, q>6.
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