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Distance-Regular Graphs with c i = b d-i and Antipodal Double Covers |
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| Authors: | Makoto Araya Akira Hiraki |
| Institution: | (1) Department of Computer Science, Shizuoka University, Hamamatsu Shizuoka, 432–8011, Japan;(2) Division of Mathematical Sciences, Osaka Kyoi ku University, Kashiwara Osaka, 582–8582, Japan |
| Abstract: | Let  be a distance-regular graph of diameter d and valency k > 2. Suppose there exists an integer s with d  2s such that c
i
= b
d-i
for all 1 i s. Then is an antipodal double cover. |
| Keywords: | distance-regular graph antipodal double cover box brox |
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