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The atom-bond sum-connectivity (ABS) index of a connected graph G = (V,E) is defined as ABS(G) = ∑uv∈E√((d(u)+d(v)-2)/(d(u)+d(v))), where d(w) is the degree of vertex w ∈ V. It was shown that this recently proposed topological index has comparable predictive applicability in chemistry with some famous indices, such as the Randić index, sum-connectivity index, and atom-bond connectivity index. Recently, the chemical bicyclic graphs with minimum ABS index were characterized. It was conjectured that this result also holds for general bicyclic graphs. We confirm this conjecture in the present paper.
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