On Bipartite $Q$-Polynomial Distance-Regular Graphs with $c_2 \le 2$
Keyword(s):
Let $\Gamma$ denote a bipartite $Q$-polynomial distance-regular graph with diameter $D \ge 4$, valency $k \ge 3$ and intersection number $c_2 \le 2$. We show that $\Gamma$ is either the $D$-dimensional hypercube, or the antipodal quotient of the $2D$-dimensional hypercube, or $D=5$.
2019 ◽
Vol 12
(07)
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pp. 2050009
Keyword(s):
Keyword(s):
2000 ◽
Vol 23
(2)
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pp. 89-97
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2001 ◽
Vol 10
(2)
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pp. 127-135
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