1.1 --- a/src/Tools/isac/Knowledge/AlgEin.thy	Thu Jun 10 12:23:57 2021 +0200
     1.2 +++ b/src/Tools/isac/Knowledge/AlgEin.thy	Thu Jun 10 12:48:50 2021 +0200
     1.3 @@ -19,9 +19,6 @@
     1.4    senkrecht       :: real
     1.5    unten           :: real
     1.6  
     1.7 -ML \<open>
     1.8 -val thy = @{theory};
     1.9 -\<close>
    1.10  (** problems **)
    1.11  setup \<open>KEStore_Elems.add_pbts
    1.12    [(Problem.prep_input @{theory} "pbl_algein" [] Problem.id_empty (["Berechnung"], [], Rule_Set.empty, NONE, [])),