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The Non-Collinearity Graph of the O+(8,2) Quadric Is Uniquely Geometrisable

โœ Scribed by Pratima Panigrahi

Book ID
110263249
Publisher
Springer
Year
2000
Tongue
English
Weight
66 KB
Volume
20
Category
Article
ISSN
0925-1022

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๐Ÿ“œ SIMILAR VOLUMES

The Johnson graph J(d, r) is unique if (
The Johnson graph J(d, r) is unique if (d, r) โ‰  (2, 8)
โœ Paul Terwilliger ๐Ÿ“‚ Article ๐Ÿ“… 1986 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 740 KB

We use the classical Root Systems to show the Johnson graph J (d, r) (2 <~ 2d ~ r < oo) is the unique distance-regular graph with its intersection numbers when (d, r):~ (2, 8). Since this exceptional case has been dealt with by Chang [6] this completes the characterization problem for the Johnson gr