Provide respectively the in- and out-degrees of a vertex v, i.e.
the number of vertices to which v is connected by respectively
incoming or outgoing links. If the graph is undirected, these
values are identical and the general degree method is also defined.
Provide respectively the in- and out-degrees of a vertex v, i.e. the number of vertices to which v is connected by respectively incoming or outgoing links. If the graph is undirected, these values are identical and the general degree method is also defined.