src/HOLCF/Domain.thy

 
 lemma exh_casedist1: "((P \<or> Q \<Longrightarrow> R) \<Longrightarrow> S) \<equiv> (\<lbrakk>P \<Longrightarrow> R; Q \<Longrightarrow> R\<rbrakk> \<Longrightarrow> S)"
 by rule auto
 
 lemma exh_casedist2: "(\<exists>x. P x \<Longrightarrow> Q) \<equiv> (\<And>x. P x \<Longrightarrow> Q)"
-by rule auto
+by rule (auto simp: norm_hhf_eq)
 
 lemma exh_casedist3: "(P \<and> Q \<Longrightarrow> R) \<equiv> (P \<Longrightarrow> Q \<Longrightarrow> R)"
 by rule auto
 
 lemmas exh_casedists = exh_casedist1 exh_casedist2 exh_casedist3