Eigenpolynomial of the Lattices in d-bounded Distance-regular Graph;
d-界距离正则图中一类格的特征多项式
? LetΓ= (X, E) denote a D-bounded distance-regular graph with diameter D≥2 and c_2 = 2, a_D = 0, then the following are equivalent:(i)Γis 2-homogenous.
·令Γ=(X,E)表示一个直径D≥2的D-界距离正则图,设交叉数c_2=2,a_D=0,则以下两条等价:(i)Γ是2-齐次的。
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