Combinatorica Package >

ToUnorderedPairs

ToUnorderedPairs[g]
constructs a list of unordered pairs representing the edges of graph g. Each edge, directed or undirected, results in a pair in which the smaller vertex appears first.
  • An option called Type that takes on values All or Simple can be used, with All being the default value. Type->Simple ignores multiple edges and self-loops in g.
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