src/LCF/ex/Ex2.ML

+
+simpset_ref() := LCF_ss;
+
+Addsimps [F_strict,K];
+
+goal thy "ALL x. F(H(x::'a,y::'b)) = H(x,F(y))";
+by (stac H 1);
+by (induct_tac "K::('a=>'b=>'b)=>('a=>'b=>'b)" 1);
+by (Simp_tac 1);
+by (asm_simp_tac (simpset() setloop (split_tac [COND_cases_iff])) 1);
+qed "example";