✦ LIBER ✦

P- and Q-Polynomial Association Schemes and Their Antipodal P-Polynomial Covers

✍ Scribed by Paul Terwilliger

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 92 KB
Volume: 14
Category: Article
ISSN: 0195-6698
DOI: 10.1006/eujc.1993.1039

No coin nor oath required. For personal study only.

✦ Synopsis

We find a condition on the intersection numbers of any (P) - and (Q)-polynomial association scheme (Y) with diameter at least 3, that holds if (Y) has an antipodal (P)-polynomial cover with diameter at least 7. If (Y) is a known example of a (P) - and (Q)-polynomial association scheme with diameter at least 3, our condition holds iff (Y) has an antipodal (P)-polynomial cover with diameter at least 7 .

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