On spherical designs obtained from $Q$-polynomial association schemes
Combinatorics
2009-10-27 v1
Abstract
We characterize that the image of the embedding of the -polynomial association scheme into eigenspace by primitive idempotent is a spherical -design in terms of the Krein numbers. And we show that the strengths of - and -polynomial schemes as spherical designs are bounded by constant.
Cite
@article{arxiv.0910.4628,
title = {On spherical designs obtained from $Q$-polynomial association schemes},
author = {Sho Suda},
journal= {arXiv preprint arXiv:0910.4628},
year = {2009}
}