Adjacent vertices

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Adjacent verticesсмежные вершины.

1. Two different vertices that incident with the same edge are called adjacent vertices.

2. In a digraph \,G = (V,A), a vertex \,u is adjacent to \,v if (u,v) \in A(G), and \,u is adjacent from \,w if (w,u) \in A(G).

3. On adjacent vertices in a hypergraph, see Partial edge.