Basic Inspection

Basic Inspection Functions

• NV(G): the number of vertices.
• NE(G): the number of edges.
• vlist(G): list containing the vertices.
• elist(G): list containing the edges.

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+ `has(G,v)`: is `v` a vertex of `G`? + `has(G,v,w)`: is `(v,w)` an edge of `G`?

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+ `neighbors(G,v)`: list of `v`'s neighbors. Also `G[v]`. + `deg(G,v)`: degree of vertex `v`. + `deg(G)`: sorted list of vertex degrees.

See also deg_hist.