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| COMBINATORICA PACKAGE SYMBOL | Tutorials »|See Also »|More About » |
 takes a set  and a function  from  to  and constructs a directed graph with vertex set  and edges  for each  in  . |
 constructs a graph with vertex set  and edge set  for each  . An option called  that takes on the values Directed and Undirected is allowed.  Directed is the default, while  Undirected returns the corresponding underlying undirected graph. |
 takes a nonnegative integer  and a function  from  onto itself and produces the directed graph with vertex set  and edge set  for each vertex  . |
, you first need to load the Combinatorica Package using 
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