src/HOL/ex/Commutative_RingEx.thy
changeset 17508 c84af7f39a6b
parent 17388 495c799df31d
     1.1 --- a/src/HOL/ex/Commutative_RingEx.thy	Tue Sep 20 13:58:58 2005 +0200
     1.2 +++ b/src/HOL/ex/Commutative_RingEx.thy	Tue Sep 20 14:03:37 2005 +0200
     1.3 @@ -5,7 +5,7 @@
     1.4  header {* Some examples demonstrating the comm-ring method *}
     1.5  
     1.6  theory Commutative_RingEx
     1.7 -imports Main
     1.8 +imports Commutative_Ring
     1.9  begin
    1.10  
    1.11  lemma "4*(x::int)^5*y^3*x^2*3 + x*z + 3^5 = 12*x^7*y^3 + z*x + 243"