1996-03-11 ago Deleted faulty comment; proved new rule Inter_Un_subset
1996-03-06 ago Ran expandshort
1996-03-06 ago Added 'section' commands
1996-03-04 ago Added a constant UNIV == {x.True}
1996-01-30 ago expanded tabs
1995-10-04 ago added local simpsets; removed IOA from 'make test'
1995-07-05 ago Added insert_not_empty, UN_empty and UN_insert (to set_ss).
1995-03-03 ago new version of HOL with curried function application