Finds a resolution derivation of a clause from a set of clauses.
Finds a resolution derivation of a clause from a set of clauses.
The resulting resolution proof ends in a subclause of the specified clause a, and its initial clauses are either from bs, tautologies, or reflexivity.
Consequence to prove.
Set of initial clauses for the resulting proof.
Resolution proof ending in a subclause of a, or None if prover9 couldn't prove the consequence.