--- a/src/HOL/Computational_Algebra/Polynomial.thy Fri Jun 29 11:39:40 2018 +0100
+++ b/src/HOL/Computational_Algebra/Polynomial.thy Fri Jun 29 14:00:37 2018 +0100
@@ -9,7 +9,7 @@
theory Polynomial
imports
- HOL.Deriv
+ Complex_Main
"HOL-Library.More_List"
"HOL-Library.Infinite_Set"
Factorial_Ring