18-314f14-th.jpg
Description:
A graph of embedded planars without isthmuses. In this case the 9-sided face is on the outside and the 7-sided face is completely inside. Image by Richard Stanley.
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18-314f14-th.jpg
Alt text:
A spiral graph of embedded polygons from 3-sided to 9-sided.
Caption:
An embedded planar graph without isthmuses. In this case the 9-sided face is on the outside and the 7–sided face is completely inside. (Image by Richard Stanley.)
Credit:
Image by Richard Stanley.
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