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(19, 9, 4) Hadamard designs and their residual designs |
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| Authors: | NM Singhi |
| Institution: | School of Mathematics, Tata Institute of Fundamental Research, Colaba, Bombay 5, India |
| Abstract: | In this paper we study (19, 9, 4) Hadamard designs and their residual designs. We prove that there are precisely six non-isomorphic solutions of (19, 9, 4) designs and that these six designs give rise to in all twenty-one mutually non-isomorphic residual designs. |
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