changeset 18308 | f18a54840629 |
parent 18267 | 5ee688e36eeb |
child 18367 | c209f4b61b51 |
--- a/NEWS Wed Nov 30 21:51:23 2005 +0100 +++ b/NEWS Wed Nov 30 22:52:46 2005 +0100 @@ -61,6 +61,10 @@ have "!!x. P x ==> Q x" by fact == note `!!x. P x ==> Q x` have "P a ==> Q a" by fact == note `P a ==> Q a` +* Isar: 'def' now admits simultaneous definitions, e.g.: + + def x == "t" and y == "u" + * Provers/induct: improved internal context management to support local fixes and defines on-the-fly. Thus explicit meta-level connectives !! and ==> are rarely required anymore in inductive goals