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src/HOL/Analysis/Cauchy_Integral_Theorem.thy
changeset 68634 db0980691ef4
parent 68532 f8b98d31ad45
child 68721 53ad5c01be3f 
--- a/src/HOL/Analysis/Cauchy_Integral_Theorem.thy	Sun Jul 15 10:41:57 2018 +0100
+++ b/src/HOL/Analysis/Cauchy_Integral_Theorem.thy	Sun Jul 15 13:15:31 2018 +0100
@@ -6919,7 +6919,7 @@
       then have "f field_differentiable at a"
         using holfb \<open>0 < e\<close> holomorphic_on_imp_differentiable_at by auto
       with True show ?thesis
-        by (auto simp: continuous_at DERIV_iff2 simp flip: DERIV_deriv_iff_field_differentiable
+        by (auto simp: continuous_at has_field_derivative_iff simp flip: DERIV_deriv_iff_field_differentiable
                 elim: rev_iffD1 [OF _ LIM_equal])
     next
       case False with 2 that show ?thesis
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