1994-08-18 lcp 1994-08-18 /unvarifyT, unvarify: moved to Pure/logic.ML
1994-07-06 wenzelm 1994-07-06 changed comment only;
1994-05-26 wenzelm 1994-05-26 added mk_type, dest_type, mk_inclass, dest_inclass (for axclasses); restored functor sig constraint :LOGIC;
1994-01-04 wenzelm 1994-01-04 commented out sig constraint of functor (for debugging purposes);
1993-10-21 lcp 1993-10-21 logic/mk_equals,mk_flexpair: now calls fastype_of instead of type_of. So it no longer checks t properly -- but it never checked u anyway, and all existing calls are derived from certified terms...
1993-09-16 clasohm 1993-09-16 Initial revision