src/HOL/Library/Preorder.thy
changeset 67006 b1278ed3cd46
parent 66453 cc19f7ca2ed6
child 67398 5eb932e604a2
     1.1 --- a/src/HOL/Library/Preorder.thy	Sat Nov 04 18:57:49 2017 +0100
     1.2 +++ b/src/HOL/Library/Preorder.thy	Sat Nov 04 19:17:19 2017 +0100
     1.3 @@ -3,7 +3,7 @@
     1.4  section \<open>Preorders with explicit equivalence relation\<close>
     1.5  
     1.6  theory Preorder
     1.7 -imports HOL.Orderings
     1.8 +imports Main
     1.9  begin
    1.10  
    1.11  class preorder_equiv = preorder