Title of article
Krein parameters and antipodal tight graphs with diameter 3 and 4 Original Research Article
Author/Authors
Aleksandar Juri?i?، نويسنده , , Jack Koolen، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2002
Pages
22
From page
181
To page
202
Abstract
We determine which Krein parameters of nonbipartite antipodal distance-regular graphs of diameter 3 and 4 can vanish, and give combinatorial interpretations of their vanishing. We also study tight distance-regular graphs of diameter 3 and 4. In the case of diameter 3, tight graphs are precisely the Taylor graphs. In the case of antipodal distance-regular graphs of diameter 4, tight graphs are precisely the graphs for which the Krein parameter q114 vanishes.
Keywords
Taylor graphs , Distance-regular graphs , Krein parameters , Antipodal graphs , 1-Homogeneous graphs , Tight graphs , Locally strongly-regular
Journal title
Discrete Mathematics
Serial Year
2002
Journal title
Discrete Mathematics
Record number
949923
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