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Genus
Consecutive non-orientable embedding obstructions ★★★
Author(s):
Conjecture Is there a graph
that is a minor-minimal obstruction for two non-orientable surfaces?
![$ G $](/files/tex/b8e7ad0330f925492bf468b5c379baec88cf1b3d.png)
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Author(s):
Note: Resolved problems from this section may be found in Solved problems.