Cut Elimination for Weak Modal Grzegorczyk Logic via Non-Well-Founded Proofs
Yury Savateev, Daniyar Salkarbekovich Shamkanov · arXiv (Cornell University) · 2018
We present a sequent calculus for the weak Grzegorczyk logic Go allowing non-well-founded proofs and obtain the cut-elimination theorem for it by constructing a continuous cut-elimination mapping acting on these proofs.