2CNF with 3 variable occurences
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04-11-2019 - |
문제
If we do not allow unit clauses, can 2CNF containing 3 occurences per variable be unsatisfiable?
Every time I try to connect opposing variables to a cycle, I need to draw 4 edges for at least one variable (2 per positive and negative occurences).
So, is it even possible?
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