networks[isplanar] - check the planarity of a graph
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Calling Sequence
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isplanar(G)
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Description
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This procedure checks the given graph for planarity.
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A copy of the graph G is first simplified by use of gsimp() to remove loops and multiple edges.
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The result of the procedure call is true if the resulting simple graph has a planar embedding and false otherwise.
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This routine is normally loaded via the command with(networks) but may also be referenced using the full name networks[isplanar](...).
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