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Incidence matrices of t-designs |
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| Authors: | Richard M. Wilson |
| Affiliation: | Department of Mathematics California Institute of Technology Pasadena, California 91125 USA |
| Abstract: | We point out a generalization of the matrix equation NNT=(r? λ)I+λJ to t-designs with t>2 and derive extensions of Fisher's, Connor's, and Mann's inequalities for block designs. |
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