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cs.LO2022
Exponential separations using guarded extension variables
Emre Yolcu, Marijn J. H. Heule
We study the complexity of proof systems augmenting resolution with inference rules that allow, given a formula in conjunctive normal form, deriving clauses that are not necess…
cs.LO2022
Towards the shortest DRAT proof of the Pigeonhole Principle
Isaac Grosof, Naifeng Zhang, Marijn J. H. Heule
The Pigeonhole Principle (PHP) has been heavily studied in automated reasoning, both theoretically and in practice. Most solvers have exponential runtime and proof length, while so…