1.1 --- a/src/Tools/isac/Knowledge/Equation.thy	Sat Mar 31 10:30:17 2018 +0200
     1.2 +++ b/src/Tools/isac/Knowledge/Equation.thy	Tue Apr 03 14:50:58 2018 +0200
     1.3 @@ -3,7 +3,7 @@
     1.4     (c) due to copyright terms
     1.5  *)
     1.6  
     1.7 -theory Equation imports Atools begin
     1.8 +theory Equation imports Base_Tools begin
     1.9  
    1.10  text {* univariate equations over terms :
    1.11    In 2003 Richard Lang prototyped ISAC's equation solver while also alpha-testing