changeset 45543 | 827bf668c822 |
parent 45529 | 0e1037d4e049 |
child 45604 | 29cf40fe8daf |
--- a/src/HOL/Word/Bit_Representation.thy Thu Nov 17 08:07:54 2011 +0100 +++ b/src/HOL/Word/Bit_Representation.thy Thu Nov 17 12:29:48 2011 +0100 @@ -270,6 +270,9 @@ lemmas bin_eqI = ext [THEN bin_nth_eq_iff [THEN iffD1], standard] +lemma bin_eq_iff: "x = y \<longleftrightarrow> (\<forall>n. bin_nth x n = bin_nth y n)" + by (auto intro!: bin_nth_lem del: equalityI) + lemma bin_nth_Pls [simp]: "~ bin_nth Int.Pls n" by (induct n) auto