Wed, 16 Apr 1997 18:16:02 +0200 wenzelm improved inc, dec;
Wed, 16 Apr 1997 18:15:32 +0200 wenzelm Type inference (isolated from type.ML, completely reimplemented).
Wed, 16 Apr 1997 18:14:43 +0200 wenzelm Type classes and sorts (isolated from type.ML).
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