Tails of Bipartite Distance-regular Grap
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Michael S. Lang
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Article
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2002
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Elsevier Science
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English
β 205 KB
Let denote a bipartite distance-regular graph with diameter D β₯ 4 and valency k β₯ 3. Let ΞΈ 0 > ΞΈ 1 > β’ β’ β’ > ΞΈ D denote the eigenvalues of and let E 0 , E 1 , . . . , E D denote the associated primitive idempotents. Fix s (1 β€ s β€ D -1) and abbreviate E := E s . We say E is a tail whenever the entry