Kite-free P- and Q-polynomial schemes

Chih-wen Weng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Let Y = (X, {Ri}o≤i≤d) denote a P-polynomial association scheme. By a kite of length i (2 ≤ i ≤ d) in Y, we mean a 4-tuple xyzu (x, y, z, u ∈ X) such that (x, y) ∈ R1, (x, z) ∈ R1, (y, z) ∈ R1, (u, y) ∈ Ri-1, (u, z) ∈ Ri-1, (u, x) ∈ Ri. Our main result in this paper is the following.

Original languageEnglish
Pages (from-to)201-207
Number of pages7
JournalGraphs and Combinatorics
Issue number2
StatePublished - Jun 1995


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