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Dual bipartite Q-polynomial distance-regular graphs. (English) Zbl 0921.05064
Summary: We classify the dual bipartite \(Q\)-polynomial distance-regular graphs of diameter \(d\geq 5\) which are not bipartite. Results of Curtin and Nomura give a classification of the dual bipartite \(Q\)-polynomial distance-regular graphs of diameter \(d\geq 6\) which are bipartite. This completes a classification of the dual bipartite \(Q\)-polynomial distance-regular graphs of diameter \(d\geq 6\). \(\copyright\) Academic Press.

MSC:
05E30 Association schemes, strongly regular graphs
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