Peter Selinger’s fitch.sty package is a popular way to produce nicely formatted Fitch-style natural deduction proofs (e.g., in the free/open logic textbooks of the forall x family). It is now maintained again and a new version is in preparation.
Peter Selinger’s fitch.sty package is a popular way to produce nicely formatted Fitch-style natural deduction proofs (e.g., in the free/open logic textbooks of the forall x family). It is now maintained again and a new version is in preparation.