Sun, 23 Apr 2000 11:34:05 +0200 paulson removed some duplication, etc.
Sun, 23 Apr 2000 11:33:41 +0200 paulson now uses the new cancel_numerals simproc
Fri, 21 Apr 2000 11:36:00 +0200 paulson Provers/Arith/inverse_fold.ML is already obsolete
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