LK: Classical First-Order Sequent Calculus

This directory contains the Standard ML sources of the Isabelle system for First-Order Logic as a classical sequent calculus. (For a Natural Deduction version, see FOL.) Important files include
ROOT.ML
loads all source files. Enter an ML image containing Pure Isabelle and type: use "ROOT.ML";

Makefile
compiles the files under Poly/ML or SML of New Jersey

ex
subdirectory containing examples. To execute them, enter an ML image containing LK and type: use "ex/ROOT.ML";

Useful references on First-Order Logic: