huffman [Fri, 04 Nov 2011 08:00:48 +0100] rev 45335
ex/Tree23.thy: simplify proof of bal_del0
huffman [Fri, 04 Nov 2011 07:37:37 +0100] rev 45334
ex/Tree23.thy: simplify proof of bal_add0
huffman [Fri, 04 Nov 2011 07:04:34 +0100] rev 45333
ex/Tree23.thy: simpler definition of ordered-ness predicate
huffman [Thu, 03 Nov 2011 17:40:50 +0100] rev 45332
ex/Tree23.thy: prove that deletion preserves balance
wenzelm [Fri, 04 Nov 2011 00:07:45 +0100] rev 45331
more liberal Parse.fixes, to avoid overlap of mixfix with is-pattern (notably in 'obtain' syntax);
wenzelm [Thu, 03 Nov 2011 23:55:53 +0100] rev 45330
more general Proof_Context.bind_propp, which allows outer parameters;
obtain: some support for term bindings within the proof, depending on parameters;