综合
Proof complexity
Proof complexity is the study of the sizes of propositional proofs, asking whether every tautology has a short proof or some require exponential length; it began with Tseitin in 1966.
综合
Resolution (logic)
Resolution, also known as the resolution principle, is a single rule of inference for proving formulas in conjunctive normal form unsatisfiable, developed by J. A. Robinson in 1965.