文摘
Let \(G\) be a connected graph, and let \(DG\) denote the double graph of \(G\). In this paper, we first derive closed-form formulas for resistance distances and the Kirchhoff index of \(DG\) in terms of that of \(G\). Then closed-form formulas for general \(k\)-iterated double graphs are also obtained. Finally, as illustration examples, for several special kinds of graphs, such as, the complete graph, the path, the cycle, etc., the explicit formulas for resistance distances and Kirchhoff indices of their \(k\)-iterated double graphs are given respectively. Keywords Double graph Resistance distance Kirchhoff index