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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:
 5e+30 Association schemes, strongly regular graphs
##### Keywords:
distance-regular graphs
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