Thu, 26 Sep 2013 13:37:33 +0200 | lammich | Added symmetric code_unfold-lemmas for null and is_none | changeset | files |
Thu, 26 Sep 2013 16:33:34 -0700 | huffman | tuned proofs | changeset | files |
Thu, 26 Sep 2013 16:33:32 -0700 | huffman | moved lemma | changeset | files |