PlanarQ

As of Version 10, most of the functionality of the Combinatorica package is built into the Wolfram System. >>

PlanarQ[g]
yields True if graph g is planar, meaning it can be drawn in the plane so no two edges cross.

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基本范例  (2)基本范例  (2)

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PlanarQ has been superseded by PlanarGraphQ:

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