(* simplification of terms

    author: Walther Neuper 050912

    (c) due to copyright terms

 use"Knowledge/Simplify.ML";

 use"Simplify.ML";

 *)

 (** interface isabelle -- isac **)

 theory' := overwritel (!theory', [("Simplify.thy",Simplify.thy)]);

 (** problems **)

 store_pbt

  (prep_pbt Simplify.thy "pbl_simp" [] e_pblID

  (["simplification"],

   [("#Given" ,["term t_"]),

    ("#Find"  ,["normalform n_"])

   ],

   append_rls "e_rls" e_rls [(*for preds in where_*)], 

   SOME "Simplify t_", 

   []));

 store_pbt

  (prep_pbt Simplify.thy "pbl_vereinfache" [] e_pblID

  (["vereinfachen"],

   [("#Given" ,["term t_"]),

    ("#Find"  ,["normalform n_"])

   ],

   append_rls "e_rls" e_rls [(*for preds in where_*)], 

   SOME "Vereinfache t_", 

   []));

 (** methods **)

 store_met

     (prep_met Simplify.thy "met_simp" [] e_metID

 	      (["simplification"],

 	       [("#Given" ,["term t_"]),

 		("#Find"  ,["normalform n_"])

 		],

 	       {rew_ord'="tless_true",

 		rls'= e_rls, 

 		calc = [], 

 		srls = e_rls, 

 		prls=e_rls,

 		crls = e_rls, nrls = e_rls},

 	       "empty_script"

 	       ));

 (** CAS-command **)

 (*.function for handling the cas-input "Simplify (2*a + 3*a)":

    make a model which is already in ptree-internal format.*)

 (* val (h,argl) = strip_comb (str2term "Simplify (2*a + 3*a)");

    val (h,argl) = strip_comb ((term_of o the o (parse thy)) 

 				  "Simplify (2*a + 3*a)");

    *)

 fun argl2dtss t =

     [((term_of o the o (parse thy)) "term", t),

      ((term_of o the o (parse thy)) "normalform", 

       [(term_of o the o (parse thy)) "N"])

      ]

   | argl2dtss _ = raise error "Simplify.ML: wrong argument for argl2dtss";

 castab := 

 overwritel (!castab, 

 	    [((term_of o the o (parse thy)) "Simplify",  

 	      (("Isac.thy", ["simplification"], ["no_met"]), 

 	       argl2dtss)),

 	     ((term_of o the o (parse thy)) "Vereinfache",  

 	      (("Isac.thy", ["vereinfachen"], ["no_met"]), 

 	       argl2dtss))

 	     ]);