On tight projective designs

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It is shown that among all tight designs in FP^n, where F is R, C, or H (quaternions), other than RP^1, only 5-designs in CP^1 have irrational angle set. This is the only case of equal ranks of the first and the last irreducible idempotent in the corresponding Bose-Mesner algebra.
10 pages, no figures

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Combinatorics, 05B30

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http://salesiana.dossiersoluciones.com/handle/123456789/125936

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0703526
 http://arxiv.org/abs/math/0703526

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arXiv