Prove theorem 320- a renamable horn clause set s is


Prove Theorem 3.20.

Hints: prove the theorem first for Horn clauses. Then note that a unit resolution proof before renaming is a unit resolution proof after renaming.

Theorem 3.20
A renamable Horn clause set S is unsatisfiable if and only if the unit resolution algorithm derives the empty clause from S.

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Financial Econometrics: Prove theorem 320- a renamable horn clause set s is
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