Changes by: Aleksey Nogin (nogin at cs.caltech.edu)
Date: 2006-01-06 22:16:30 -0800 (Fri, 06 Jan 2006)
Revision: 8419
Log message:

      - Updated arithT to generate fewer wf subgoals.
      - Proved all the rules that were left unproven in Itt_int_arith.