# HG changeset patch # User nipkow # Date 1107330783 -3600 # Node ID 704b3ce6d0f77abee09afa772974674a586a4080 # Parent b3f530e7aa1c92497dbb1b398cac11814256a39d added [simp] diff -r b3f530e7aa1c -r 704b3ce6d0f7 src/HOL/Finite_Set.thy --- a/src/HOL/Finite_Set.thy Wed Feb 02 08:45:14 2005 +0100 +++ b/src/HOL/Finite_Set.thy Wed Feb 02 08:53:03 2005 +0100 @@ -1828,7 +1828,7 @@ lemma (in ACf) foldSet1_equality: "(A, y) : foldSet1 f ==> fold1 f A = y" by (unfold fold1_def) (blast intro: foldSet1_determ) -lemma fold1_singleton: "fold1 f {a} = a" +lemma fold1_singleton[simp]: "fold1 f {a} = a" by (unfold fold1_def) blast lemma (in ACf) foldSet1_insert_aux: "x \ A ==> A \ {} \