On tight projective designs
Combinatorics
2007-05-23 v1
Abstract
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.
Cite
@article{arxiv.math/0703526,
title = {On tight projective designs},
author = {Yuri I. Lyubich},
journal= {arXiv preprint arXiv:math/0703526},
year = {2007}
}
Comments
10 pages, no figures