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graphs that can be embedded into the plane, i.e. that can be drawn without crossings between the lines representing edges.

36 votes
21 answers
6k views

Generalizations of Planar Graphs

This is a follow up to Harrison's question: why planar graphs are so exceptional. I would like to ask about (and collect answers to) various notions, in graph theory and beyond graph theory (topology; …
Gil Kalai's user avatar
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