SAT solvers are often used to for problems where correctness is critical. For this reason SAT solvers are expected to produce proofs of unsatisfiability. Such proofs allow us to independently check ...

The program(s) here implement a SAT solver based on BDDs. The key feature is that, for unsatisfiable formulas, they also generate proofs of unsatisfiable in Extended Resolution. Some inspirations for ...

The authors investigated how secondary mathematics teachers check student geometry proofs. From video records of geometry teachers checking proofs, they conjectured that teachers have different ...