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Edge-distance-regular graphs

✍ Scribed by M. Cámara; C. Dalfó; J. Fàbrega; M.A. Fiol; E. Garriga

Book ID
119236560
Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
189 KB
Volume
38
Category
Article
ISSN
1571-0653

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Let Γ be a regular graph with n vertices, diameter D, and d + 1 In a previous paper, the authors showed that if P (λ) > n -1, then D ≤ d -1, where P is the polynomial of degree d-1 which takes alternating values ±1 at λ 1 , . . . , λ d . The graphs satisfying P (λ) = n -1, called boundary graphs, h