1997-04-01 wenzelm 1997-04-01 improved messages;
1996-11-27 paulson 1996-11-27 Eta-expanded some declarations that are illegal under value polymorphism
1996-02-05 clasohm 1996-02-05 expanded tabs; renamed subtype to typedef; incorporated Konrad's changes
1995-10-04 clasohm 1995-10-04 added local simpsets; removed IOA from 'make test'
1995-03-03 clasohm 1995-03-03 new version of HOL with curried function application