The general sum-connectivity index of a graph G is defined as χ α (G) = ∑edges
(d u + d v ) α , where d u denotes the degree of vertex u in G and α is a real
number. In this report, we determine the minimum and the second minimum values
of the general sum-connectivity indices of n-vertex unicyclic graphs for
non-zero α ≥ −1, and characterize the corresponding extremal graphs.... hiện toàn bộ