Consecutive non-orientable embedding obstructions

Importance: High ✭✭✭
Author(s):
Keywords: minor
surface
Recomm. for undergrads: no
Posted by: Bruce Richter
on: March 27th, 2007

\begin{conjecture} Is there a graph $G$ that is a minor-minimal obstruction for two non-orientable surfaces? \end{conjecture}


Minor-Minimal Obstruction

Is a minor-minimal obstruction the same as a forbidden minor?

yes

yes

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