Prefect colouring, 9 colours

T01371 = data171/DFH9
data171/DFH9
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Geometry

For general details about this class of tiling, see.

References

Publications referenced:
  1. of Dirk Frettlöh. Counting perfect colourings of plane regular tilings, Zeitschrift für Kristallographie, 2009. [frettloeh] {To be published} Available on Internet.

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