# HG changeset patch # User desharna # Date 1668008182 -3600 # Node ID 0fbfb4293ff714a997a00fded262f0af20d0045c # Parent 11077c158b37fa6e38a8321c0b50074802d59fb7 added lemma reflp_on_conversp[simp] diff -r 11077c158b37 -r 0fbfb4293ff7 NEWS --- a/NEWS Wed Nov 09 15:38:43 2022 +0100 +++ b/NEWS Wed Nov 09 16:36:22 2022 +0100 @@ -45,6 +45,7 @@ preorder.antisymp_less[simp] preorder.reflp_ge[simp] preorder.reflp_le[simp] + reflp_on_conversp[simp] totalp_on_singleton[simp] * Theory "HOL.Transitive_Closure": diff -r 11077c158b37 -r 0fbfb4293ff7 src/HOL/Relation.thy --- a/src/HOL/Relation.thy Wed Nov 09 15:38:43 2022 +0100 +++ b/src/HOL/Relation.thy Wed Nov 09 16:36:22 2022 +0100 @@ -951,6 +951,9 @@ lemma refl_on_converse [simp]: "refl_on A (converse r) = refl_on A r" by (auto simp: refl_on_def) +lemma reflp_on_conversp [simp]: "reflp_on A R\\ \ reflp_on A R" + by (auto simp: reflp_on_def) + lemma sym_converse [simp]: "sym (converse r) = sym r" unfolding sym_def by blast