Geodesic
Amply Regular Graphs with $b_1=6$
Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 2 (2009) no. 1, pp. 63-77.

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The unnoriented graph with $v$ verteces of valency $k$, such that every edge belongs to $\lambda$ triangles, is called an edge regular graph with the parameters $(v,k,\lambda)$. Let $b_1=k-\lambda-1$. In [1] it is proved that a connected edge regular graph with $b_1=1$ is either a polygon or a complete multipart graph all of whose parts have order 2. Edge regular graphs with $b_1\le5$ have been studied in previous work. In the present paper we investigate amply regular graphs with $b_1=6$.
Keywords: amply regular graph, unoriented graph. 
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Konstantin S. Efimov; Alexander A. Makhnev. Amply Regular Graphs with $b_1=6$. Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 2 (2009) no. 1, pp. 63-77. http://geodesic.mathdoc.fr/item/JSFU_2009_2_1_a5/

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