The strong product digraph G1(?)G2 is constructed by the known digraph G1 and G2 of small order.The digraph G1(?)G2 cons......

A dynamic quantitative theory and measurement of power or dominance structures are proposed.Such power structures are re......

A digraph D is k-ordered if for every sequence S:v1,v2,…,vk of k distinct vertices,there exists a cycle C such that C e......