src/HOL/NatDef.thy
1997-10-20 wenzelm 1997-10-20 adapted to qualified names;
1997-10-10 wenzelm 1997-10-10 fixed dots;
1997-05-20 paulson 1997-05-20 New pattern-matching definition of pred_nat
1997-02-12 nipkow 1997-02-12 New class "order" and accompanying changes. In particular reflexivity of <= is now one rewrite rule.