theory Stream_Input4 imports Stream_More_Corec_Upto3 "~~/src/HOL/Library/FSet" begin type_synonym 'a K4 = "'a fset" composition_bnf (open) K4: "'a K4" abbreviation (input) "K4_map ≡ fimage" abbreviation (input) "K4_rel ≡ rel_fset" abbreviation (input) "K4_set ≡ fset" abbreviation "bd_K4 ≡ natLeq" type_synonym bd_type_K4 = nat end