changeset 75455 | 91c16c5ad3e9 |
parent 73932 | fd21b4a93043 |
child 76484 | defaa0b17424 |
--- a/src/HOL/Library/Poly_Mapping.thy Wed May 11 10:42:24 2022 +0200 +++ b/src/HOL/Library/Poly_Mapping.thy Tue May 17 14:10:14 2022 +0100 @@ -1688,7 +1688,7 @@ lemma keys_cmul_iff [iff]: "i \<in> Poly_Mapping.keys (frag_cmul c x) \<longleftrightarrow> i \<in> Poly_Mapping.keys x \<and> c \<noteq> 0" - apply (auto simp: ) + apply auto apply (meson subsetD keys_cmul) by (metis in_keys_iff lookup_frag_cmul mult_eq_0_iff)