src/HOL/Real/Hyperreal/HyperDef.thy
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     3     Author      : Jacques D. Fleuriot
     3     Author      : Jacques D. Fleuriot
     4     Copyright   : 1998  University of Cambridge
     4     Copyright   : 1998  University of Cambridge
     5     Description : Construction of hyperreals using ultrafilters
     5     Description : Construction of hyperreals using ultrafilters
     6 *) 
     6 *) 
     7 
     7 
     8 HyperDef = Filter + Real +
     8 HyperDef = Filter + RealBin +
     9 
     9 
    10 consts 
    10 consts 
    11  
    11  
    12     FreeUltrafilterNat   :: nat set set
    12     FreeUltrafilterNat   :: nat set set
    13 
    13