On the Randić Index
On the Randić Index
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DOI:
10.1007/s10910-005-9020-6
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发表时间:
2005-10
影响因子:
1.7
通讯作者:
Huiqing Liu;Mei Lu;F. Tian
中科院分区:
文献类型:
--
作者:
Huiqing Liu;Mei Lu;F. Tian
The Randić index of an organic molecule whose molecular graphGis defined as the sum of (d(u)d(v))−1/2over all pairs of adjacent vertices ofG, whered(u) is the degree of the vertexuinG. In Delorme et al., Discrete Math. 257 (2002) 29, Delorme et al gave a best-possible lower bound on the Randić index of a triangle-free graphGwith given minimum degree δ(G). In the paper, we first point out a mistake in the proof of their result (Theorem 2 of Delorme et al., Discrete Math. 257 (2002) 29), and then we will show that the result holds when δ(G)≥ 2.