FOL: First-Order Logic with Natural Deduction
This directory contains the ML sources of the Isabelle system for
First-Order Logic (constructive and classical versions). For a
classical sequent calculus, see LK.
The ex subdirectory contains some examples.
Useful references on First-Order Logic:
- Simon Thompson, Type Theory and Functional Programming (Addison-Wesley, 1991)
(The first chapter is an excellent introduction to natural
deduction in general.)
- Antony Galton, Logic for Information Technology (Wiley, 1990)
- Michael Dummett, Elements of Intuitionism (Oxford, 1977)