NeighborhoodGraph
NeighborhoodGraph[g,v] gives the graph neighborhood of a vertex v in the graph g.
NeighborhoodGraph[g,{a1,a2,…}] gives the graph neighborhood of the ai that can be vertices, edges, or subgraphs of g.
NeighborhoodGraph[g,patt] gives the graph neighborhood of the vertices and edges that match the pattern patt.
NeighborhoodGraph[g,…,d] gives the neighborhood up to distance d.
NeighborhoodGraph[{v->w,…},…] uses rules v->w to specify the graph g.
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