GaoYubin, ShaoYanling
Abstract
Let D be a digraph of order n. The double vertex digraph S2(D) of D is the digraph whose vertex set consists of all ordered pairs of distinct vertices of V(D) such that there is an arc in S2(D) f...
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Let D be a digraph of order n. The double vertex digraph S2(D) of D is the digraph whose vertex set consists of all ordered pairs of distinct vertices of V(D) such that there is an arc in S2(D) f...
Key concepts: Digraph, Combinatorics, Vertex (graph theory), Mathematics, Order (exchange), Discrete mathematics, Graph, Economics