1.1 --- a/src/Tools/isac/Knowledge/Base_Tools.thy Tue Aug 17 22:50:20 2021 +0200
1.2 +++ b/src/Tools/isac/Knowledge/Base_Tools.thy Wed Aug 18 11:35:24 2021 +0200
1.3 @@ -6,7 +6,7 @@
1.4 begin
1.5 subsection \<open>theorems for Base_Tools\<close>
1.6
1.7 -lemma real_unari_minus: "Not (a is_const) ==> - a = (-1) * (a::real)" by auto
1.8 +lemma real_unari_minus: "Not (a is_num) ==> - a = (-1) * (a::real)" by auto
1.9 (*lemma real_unari_minus: "- a = (-1) * (a::real)" by auto LOOPS WITH NUMERALS*)
1.10 (*Semiring_Normalization.comm_ring_1_class.ring_normalization_rules(1)*)
1.11