Symmetric Digraph: A directed graph derived from an undirected graph by replacing each edge with a pair of oppositely directed arcs, preserving the structural symmetry.

, Joel E. Cohen, Giant Components in Three-Parameter Random Directed Graphs, Advances in Applied Probability, Vol. 24, No. 4 (Dec., 1992), pp. 845-857 ...

In this paper, we prove that all but one of the components of the transfer digraph D m * needed for the enumeration of 2-factors in the rectangular, thick cylinder and Moebius strip grid graphs of the ...