Fig. 4From: Chained graphs and some applicationsa: a closed chained graph with 6 enumerated node sets (each set contains one node). b: the bipartite structure \({\widetilde{{{\mathcal{V}}}}}_1={{\mathcal{V}}}_1\cup {{\mathcal{V}}}_3\cup {{\mathcal{V}}}_5\) and \({\widetilde{{{\mathcal{V}}}}}_2={{\mathcal{V}}}_2\cup {{\mathcal{V}}}_4\cup {{\mathcal{V}}}_6\)Back to article page