1.1 --- a/src/HOL/NSA/Filter.thy	Thu Jan 16 16:20:17 2014 +0100
     1.2 +++ b/src/HOL/NSA/Filter.thy	Thu Jan 16 16:33:19 2014 +0100
     1.3 @@ -7,7 +7,7 @@
     1.4  header {* Filters and Ultrafilters *}
     1.5  
     1.6  theory Filter
     1.7 -imports "~~/src/HOL/Library/Zorn" "~~/src/HOL/Library/Infinite_Set"
     1.8 +imports "~~/src/HOL/Library/Infinite_Set"
     1.9  begin
    1.10  
    1.11  subsection {* Definitions and basic properties *}