ISABELLE DIRECTORY for Natural deduction logic (Intuitionistic and Classical)

This directory contains the Standard ML sources of the Isabelle system for
First-Order Logic.  

The file ROOT.ML can be used to load the files; type

    use "ROOT.ML";

to an ML session that already contains Pure Isabelle. When this command
terminates, save the core image (by calling exportML if you are using
Standard ML of New Jersey). 

If your compiler is Poly/ML then the Makefile can load this logic.

The subdirectory ex contains examples.  To execute them, after you have
loaded the logic, type

    use "ex/ROOT.ML";

