(* testexamples for Poly, polynomials

   author: Matthias Goldgruber 2003

   (c) due to copyright terms

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        10        20        30        40        50        60        70        80

LEGEND:

WN060104: examples marked with 'SPB' came into 'exp_IsacCore_Simp_Poly_Book.xml'

          examples marked with 'SPO' came into 'exp_IsacCore_Simp_Poly_Other.xml'

*)

"--------------------------------------------------------";

"--------------------------------------------------------";

"table of contents --------------------------------------";

"--------------------------------------------------------";

"-------- check is'_polyexp is_polyexp ------------------";

"-------- investigate (new 2002) uniary minus -----------";

"-------- check make_polynomial with simple terms -------";

"-------- fun is_multUnordered --------------------------";

"-------- examples from textbook Schalk I ---------------";

"-------- check pbl  'polynomial simplification' --------";

"-------- me 'poly. simpl.' Schalk I p.63 No.267b -------";

"-------- interSteps for Schalk 299a --------------------";

"-------- norm_Poly NOT COMPLETE ------------------------";

"-------- ord_make_polynomial ---------------------------";

"--------------------------------------------------------";

"--------------------------------------------------------";

"--------------------------------------------------------";

"-------- check is'_polyexp is_polyexp ------------------";

"-------- check is'_polyexp is_polyexp ------------------";

"-------- check is'_polyexp is_polyexp ------------------";

if is_polyexp @{term "x / x"} 

then error "poly.sml: check is'_polyexp is_polyexp" else ();

"-------- investigate (new 2002) uniary minus -----------";

"-------- investigate (new 2002) uniary minus -----------";

"-------- investigate (new 2002) uniary minus -----------";

(*---------------------------------------------- vvvvvvvvvvvvvv -----------------------*)

val t = (#prop o rep_thm) @{thm real_diff_0}; (*"0 - ?x = - ?x"*)

atomty t;

(*

*** Const (HOL.Trueprop, bool => prop)

*** . Const (HOL.eq, real => real => bool)

*** . . Const (Groups.minus_class.minus, real => real => real)

*** . . . Const (Groups.zero_class.zero, real)

*** . . . Var ((x, 0), real)

*** . . Const (Groups.uminus_class.uminus, real => real)

*** . . . Var ((x, 0), real)

*)

case t of

  Const ("HOL.Trueprop", _) $

    (Const ("HOL.eq", _) $ 

      (Const ("Groups.minus_class.minus", _) $ Const ("Groups.zero_class.zero", _) $ 

        Var (("x", 0), _)) $

             (Const ("Groups.uminus_class.uminus", _) $ Var (("x", 0), _))) => ()

| _ => error "internal representation of \"0 - ?x = - ?x\" changed";

(*----------------------------------- vvvv --------------------------------------------*)

val t = (term_of o the o (parse thy)) "-1";

atomty t;

(*** -------------

*** Free ( -1, real)                      *)

case t of

  Free ("-1", _) => ()

| _ => error "internal representation of \"-1\" changed";

(*----------------------------------- vvvvv -------------------------------------------*)

val t = (term_of o the o (parse thy)) "- 1";

atomty t;

(*

*** 

*** Free (-1, real)

*** 

*)

case t of

 Free ("-1", _) => ()

| _ => error "internal representation of \"- 1\" changed";

"======= these external values all have the same internal representation";

(* "1-x" causes syntyx error --- binary minus detected by blank inbetween !!!*)

(*----------------------------------- vvvvv -------------------------------------------*)

val t = (term_of o the o (parse thy)) "-x";

atomty t;

(**** -------------

*** Free ( -x, real)*)

case t of

  Const ("Groups.uminus_class.uminus", _) $ Free ("x", _) => ()

| _ => error "internal representation of \"-x\" changed";

(*----------------------------------- vvvvv -------------------------------------------*)

val t = (term_of o the o (parse thy)) "- x";

atomty t;

(**** -------------

*** Free ( -x, real) !!!!!!!!!!!!!!!!!!!!!!!! is the same !!!*)

case t of

  Const ("Groups.uminus_class.uminus", _) $ Free ("x", _) => ()

| _ => error "internal representation of \"- x\" changed";

(*----------------------------------- vvvvvv ------------------------------------------*)

val t = (term_of o the o (parse thy)) "-(x)";

atomty t;

(**** -------------

*** Free ( -x, real)*)

case t of

  Const ("Groups.uminus_class.uminus", _) $ Free ("x", _) => ()

| _ => error "internal representation of \"-(x)\" changed";

"-------- check make_polynomial with simple terms -------";

"-------- check make_polynomial with simple terms -------";

"-------- check make_polynomial with simple terms -------";

"----- check 1 ---";

val t = str2term "2*3*a";

val SOME (t, _) = rewrite_set_ thy false make_polynomial t;

if term2str t = "6 * a" then () else error "check make_polynomial 1";

"----- check 2 ---";

val t = str2term "2*a + 3*a";

val SOME (t, _) = rewrite_set_ thy false make_polynomial t;

if term2str t = "5 * a" then () else error "check make_polynomial 2";

"----- check 3 ---";

val t = str2term "2*a + 3*a + 3*a";

val SOME (t, _) = rewrite_set_ thy false make_polynomial t;

if term2str t = "8 * a" then () else error "check make_polynomial 3";

"----- check 4 ---";

val t = str2term "3*a - 2*a";

val SOME (t, _) = rewrite_set_ thy false make_polynomial t;

if term2str t = "a" then () else error "check make_polynomial 4";

"----- check 5 ---";

val t = str2term "4*(3*a - 2*a)";

val SOME (t, _) = rewrite_set_ thy false make_polynomial t;

if term2str t = "4 * a" then () else error "check make_polynomial 5";

"----- check 6 ---";

val t = str2term "4*(3*a^^^2 - 2*a^^^2)";

val SOME (t, _) = rewrite_set_ thy false make_polynomial t;

if term2str t = "4 * a ^^^ 2" then () else error "check make_polynomial 6";

"-------- fun is_multUnordered --------------------------";

"-------- fun is_multUnordered --------------------------";

"-------- fun is_multUnordered --------------------------";

val thy = @{theory "Isac"};

"===== works for a simple example, see rewrite.sml -- fun app_rev ===";

val t = str2term "x^^^2 * x";

val SOME (t', _) = rewrite_set_ thy true order_mult_ t;

if term2str t' = "x * x ^^^ 2" then ()

else error "poly.sml Poly.is'_multUnordered doesn't work";

(* 100928 trace_rewrite shows the first occurring difference in 267b:

###  rls: order_mult_ on: 5 * x ^^^ 2 * (2 * x ^^^ 7) + 5 * x ^^^ 2 * 3 + (6 * x ^^^ 7 + 9) + (-1 * (3 * x ^^^ 5 * (6 * x ^^^ 4)) + -1 * (3 * x ^^^ 5 * -1) +

 (-48 * x ^^^ 4 + 8))

######  rls: e_rls-is_multUnordered on: p is_multUnordered

#######  try calc: Poly.is'_multUnordered'

=======  calc. to: False  !!!!!!!!!!!!! INSTEAD OF TRUE in 2002 !!!!!!!!!!!!!

*)

val t = str2term "5 * x ^^^ 2 * (2 * x ^^^ 7) + 5 * x ^^^ 2 * 3 + (6 * x ^^^ 7 + 9) + (-1 * (3 * x ^^^ 5 * (6 * x ^^^ 4)) + -1 * (3 * x ^^^ 5 * -1) +  (-48 * x ^^^ 4 + 8))";

"----- is_multUnordered ---";

val tsort = sort_variables t;

term2str tsort = "2 * (5 * (x ^^^ 2 * x ^^^ 7)) + 3 * (5 * x ^^^ 2) + 6 * x ^^^ 7 + 9 +\n-1 * (3 * (6 * (x ^^^ 4 * x ^^^ 5))) +\n-1 * (-1 * (3 * x ^^^ 5)) +\n-48 * x ^^^ 4 +\n8";

is_polyexp t;

tsort = t;

is_polyexp t andalso not (t = sort_variables t);

if is_multUnordered t then () else error "poly.sml diff. is_multUnordered 1";

"----- eval_is_multUnordered ---";

val tm = str2term "(5 * x ^^^ 2 * (2 * x ^^^ 7) + 5 * x ^^^ 2 * 3 + (6 * x ^^^ 7 + 9) + (-1 * (3 * x ^^^ 5 * (6 * x ^^^ 4)) + -1 * (3 * x ^^^ 5 * -1) +  (-48 * x ^^^ 4 + 8))) is_multUnordered";

case eval_is_multUnordered "testid" "" tm thy of

    SOME (_, Const ("HOL.Trueprop", _) $ 

                   (Const ("HOL.eq", _) $

                          (Const ("Poly.is'_multUnordered", _) $ _) $ 

                          Const ("HOL.True", _))) => ()

  | _ => error "poly.sml diff. eval_is_multUnordered";

"----- rewrite_set_ STILL DIDN'T WORK";

val SOME (t, _) = rewrite_set_ thy true order_mult_ t;

term2str t;

"-------- examples from textbook Schalk I ---------------";

"-------- examples from textbook Schalk I ---------------";

"-------- examples from textbook Schalk I ---------------";

"-----SPB Schalk I p.63 No.267b ---";

val t = str2term "(5*x^^^2 + 3) * (2*x^^^7 + 3) - (3*x^^^5 + 8) * (6*x^^^4 - 1)";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if (term2str t) = "17 + 15 * x ^^^ 2 + -48 * x ^^^ 4 + 3 * x ^^^ 5 + 6 * x ^^^ 7 + -8 * x ^^^ 9"

then () else error "poly.sml: diff.behav. in make_polynomial 1";

"-----SPB Schalk I p.63 No.275b ---";

val t = str2term "(3*x^^^2 - 2*x*y + y^^^2) * (x^^^2 - 2*y^^^2)";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t;

if (term2str t) = ("3 * x ^^^ 4 + -2 * x ^^^ 3 * y + -5 * x ^^^ 2 * y ^^^ 2 + " ^

  "4 * x * y ^^^ 3 +\n-2 * y ^^^ 4")

then () else error "poly.sml: diff.behav. in make_polynomial 2";

"-----SPB Schalk I p.63 No.279b ---";

val t = str2term "(x-a)*(x-b)*(x-c)*(x-d)";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t;

if (term2str t) = 

  ("a * b * c * d + -1 * a * b * c * x + -1 * a * b * d * x + a * b * x ^^^ 2 +\n" ^

  "-1 * a * c * d * x +\na * c * x ^^^ 2 +\na * d * x ^^^ 2 +\n-1 * a * x ^^^ 3 +\n" ^

  "-1 * b * c * d * x +\nb * c * x ^^^ 2 +\nb * d * x ^^^ 2 +\n-1 * b * x ^^^ 3 +\n" ^

  "c * d * x ^^^ 2 +\n-1 * c * x ^^^ 3 +\n-1 * d * x ^^^ 3 +\nx ^^^ 4")

then () else error "poly.sml: diff.behav. in make_polynomial 3";

"-----SPB Schalk I p.63 No.291 ---";

val t = str2term "(5+96*x^^^3+8*x*(-4+(7- 3*x)*4*x))*(5*(2- 3*x)- (-15*x*(-8*x- 5)))";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t;

if (term2str t) = "50 + -770 * x + 4520 * x ^^^ 2 + -16320 * x ^^^ 3 + -26880 * x ^^^ 4"

then () else error "poly.sml: diff.behav. in make_polynomial 4";

"-----SPB Schalk I p.64 No.295c ---";

val t = str2term "(13*a^^^4*b^^^9*c - 12*a^^^3*b^^^6*c^^^9)^^^2";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t;

if (term2str t) = ("169 * a ^^^ 8 * b ^^^ 18 * c ^^^ 2 + -312 * a ^^^ 7 * b ^^^ 15 * c ^^^ 10" ^

  " +\n144 * a ^^^ 6 * b ^^^ 12 * c ^^^ 18")

then ()else error "poly.sml: diff.behav. in make_polynomial 5";

"-----SPB Schalk I p.64 No.299a ---";

val t = str2term "(x - y)*(x + y)";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t;

if (term2str t) = "x ^^^ 2 + -1 * y ^^^ 2"

then () else error "poly.sml: diff.behav. in make_polynomial 6";

"-----SPB Schalk I p.64 No.300c ---";

val t = str2term "(3*x^^^2*y - 1)*(3*x^^^2*y + 1)";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t;

if (term2str t) = "-1 + 9 * x ^^^ 4 * y ^^^ 2"

then () else error "poly.sml: diff.behav. in make_polynomial 7";

"-----SPB Schalk I p.64 No.302 ---";

val t = str2term

  "(13*x^^^2 + 5)*(13*x^^^2 - 5) - (5*x^^^2 + 3)*(5*x^^^2 - 3) - (12*x^^^2 + 4)*(12*x^^^2 - 4)";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t;

if term2str t = "0"

then () else error "poly.sml: diff.behav. in make_polynomial 8";

(* RL?MG?: Bei Berechnung sollte 3 mal real_plus_minus_binom1_p aus expand_poly verwendet werden *)

"-----SPB Schalk I p.64 No.306a ---";

val t = str2term "((x^^^2 + 1)*(x^^^2 - 1))^^^2";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if (term2str t) = "1 + 2 * x ^^^ 4 + 2 * -2 * x ^^^ 4 + x ^^^ 8" then ()

else error "poly.sml: diff.behav. in 2 * x ^^^ 4 + 2 * -2 * x ^^^ 4 = -2 * x ^^^ 4";

(*WN071729 when reducing "rls reduce_012_" for Schaerding,

the above resulted in the term below ... but reduces from then correctly*)

val t = str2term "1 + 2 * x ^^^ 4 + 2 * -2 * x ^^^ 4 + x ^^^ 8";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if (term2str t) = "1 + -2 * x ^^^ 4 + x ^^^ 8"

then () else error "poly.sml: diff.behav. in make_polynomial 9b";

"-----SPB Schalk I p.64 No.296a ---";

val t = str2term "(x - a)^^^3";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if (term2str t) = "-1 * a ^^^ 3 + 3 * a ^^^ 2 * x + -3 * a * x ^^^ 2 + x ^^^ 3"

then () else error "poly.sml: diff.behav. in make_polynomial 10";

"-----SPB Schalk I p.64 No.296c ---";

val t = str2term "(-3*x - 4*y)^^^3";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if (term2str t) = "-27 * x ^^^ 3 + -108 * x ^^^ 2 * y + -144 * x * y ^^^ 2 + -64 * y ^^^ 3"

then () else error "poly.sml: diff.behav. in make_polynomial 11";

"-----SPB Schalk I p.62 No.242c ---";

val t = str2term "x^^^(-4)*(x^^^(-4)*y^^^(-2))^^^(-1)*y^^^(-2)";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if (term2str t) = "1"

then () else error "poly.sml: diff.behav. in make_polynomial 12";

"-----SPB Schalk I p.60 No.209a ---";

val t = str2term "a^^^(7-x) * a^^^x";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if term2str t = "a ^^^ 7"

then () else error "poly.sml: diff.behav. in make_polynomial 13";

"-----SPB Schalk I p.60 No.209d ---";

val t = str2term "d^^^x * d^^^(x+1) * d^^^(2 - 2*x)";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if term2str t = "d ^^^ 3"

then () else error "poly.sml: diff.behav. in make_polynomial 14";

(*---------------------------------------------------------------------*)

(*---------------- ?RL?Bsple bei denen es Probleme gibt----------------*)

(*---------------------------------------------------------------------*)

"-----Schalk I p.64 No.303 ---";

val t = str2term "(a + 2*b)*(a^^^2 + 4*b^^^2)*(a - 2*b) - (a - 6*b)*(a^^^2 + 36*b^^^2)*(a + 6*b)";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if term2str t = "1280 * b ^^^ 4"

then () else error "poly.sml: diff.behav. in make_polynomial 14b";

(* Richtig - aber Binomische Formel wurde nicht verwendet! *)

(*--------------------------------------------------------------------*)

(*----------------------- Eigene Beispiele ---------------------------*)

(*--------------------------------------------------------------------*)

"-----SPO ---";

val t = str2term "a^^^2*a^^^(-2)";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if term2str t = "1" then ()

else error "poly.sml: diff.behav. in make_polynomial 15";

"-----SPO ---";

val t = str2term "a + a + a";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if term2str t = "3 * a" then ()

else error "poly.sml: diff.behav. in make_polynomial 16";

"-----SPO ---";

val t = str2term "a + b + b + b";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if term2str t = "a + 3 * b" then ()

else error "poly.sml: diff.behav. in make_polynomial 17";

"-----SPO ---";

val t = str2term "a^^^2*b*b^^^(-1)";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if term2str t = "a ^^^ 2" then ()

else error "poly.sml: diff.behav. in make_polynomial 18";

"-----SPO ---";

val t = str2term "a^^^2*a^^^(-2)";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if (term2str t) = "1" then ()

else error "poly.sml: diff.behav. in make_polynomial 19";

"-----SPO ---";

val t = str2term "b + a - b";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if (term2str t) = "a" then ()

else error "poly.sml: diff.behav. in make_polynomial 20";

"-----SPO ---";

val t = str2term "b * a * a";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if term2str t = "a ^^^ 2 * b" then ()

else error "poly.sml: diff.behav. in make_polynomial 21";

"-----SPO ---";

val t = str2term "(a^^^2)^^^3";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if term2str t = "a ^^^ 6" then ()

else error "poly.sml: diff.behav. in make_polynomial 22";

"-----SPO ---";

val t = str2term "x^^^2 * y^^^2 + x * x^^^2 * y";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if term2str t = "x ^^^ 3 * y + x ^^^ 2 * y ^^^ 2" then ()

else error "poly.sml: diff.behav. in make_polynomial 23";

"-----SPO ---";

val t = (term_of o the o (parse thy)) "a^^^2 * (-a)^^^2";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if (term2str t) = "a ^^^ 4" then ()

else error "poly.sml: diff.behav. in make_polynomial 24";

"-----SPO ---";

val t = str2term "a * b * b^^^(-1) + a";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if (term2str t) = "2 * a" then ()

else error "poly.sml: diff.behav. in make_polynomial 25";

"-----SPO ---";

val t = str2term "a*c*b^^^(2*n) + 3*a + 5*b^^^(2*n)*c*b";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t; term2str t;

if (term2str t) = "3 * a + 5 * b ^^^ (1 + 2 * n) * c + a * b ^^^ (2 * n) * c"

then () else error "poly.sml: diff.behav. in make_polynomial 26";

(*MG030627 -------------vvv-: Verschachtelte Terme -----------*)

"-----SPO ---";

val t = str2term "(1 + (x*y*a) + x)^^^(1 + (x*y*a) + x)";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t;

if term2str t = "(1 + x + a * x * y) ^^^ (1 + x + a * x * y)"

then () else error "poly.sml: diff.behav. in make_polynomial 27";(*SPO*)

val t = str2term "(1 + x*(y*z)*zz)^^^(1 + x*(y*z)*zz)";

val SOME (t,_) = rewrite_set_ thy false make_polynomial t;

if term2str t = "(1 + x * y * z * zz) ^^^ (1 + x * y * z * zz)"

then () else error "poly.sml: diff.behav. in make_polynomial 28";

"-------- check pbl  'polynomial simplification' --------";

"-------- check pbl  'polynomial simplification' --------";

"-------- check pbl  'polynomial simplification' --------";

val fmz = ["Term ((5*x^^^2 + 3) * (2*x^^^7 + 3) - (3*x^^^5 + 8) * (6*x^^^4 - 1))", "normalform N"];

"-----0 ---";

case refine fmz ["polynomial","simplification"]of

    [Matches (["polynomial", "simplification"], _)] => ()

  | _ => error "poly.sml diff.behav. in check pbl, refine";

(*...if there is an error, then ...*)

"-----1 ---";

default_print_depth 7;

val pbt = get_pbt ["polynomial","simplification"];

default_print_depth 3;

(*if there is ...

> val NoMatch' {Given=gi, Where=wh, Find=fi,...} = match_pbl fmz pbt;

... then trace_rewrite:*)

"-----2 ---";

trace_rewrite := false;

match_pbl fmz pbt;

trace_rewrite := false;

(*... if there is no rewrite, then there is something wrong with prls*)

"-----3 ---";

default_print_depth 7;

val prls = (#prls o get_pbt) ["polynomial","simplification"];

default_print_depth 3;

val t = str2term "((5*x^^^2 + 3) * (2*x^^^7 + 3) - (3*x^^^5 + 8) * (6*x^^^4 - 1)) is_polyexp";

val SOME (t',_) = rewrite_set_ thy false prls t;

if t' = @{term True} then () 

else error "poly.sml: diff.behav. in check pbl 'polynomial..";

(*... if this works, but --1-- does still NOT work, check types:*)

"-----4 ---";

(*show_types:=true;*)

(*

> val NoMatch' {Given=gi, Where=wh, Find=fi,...} = match_pbl fmz pbt;

val wh = [False "(t_::real => real) (is_polyexp::real)"]

......................^^^^^^^^^^^^...............^^^^*)

val Matches' _ = match_pbl fmz pbt;

(*show_types:=false;*)

"-------- me 'poly. simpl.' Schalk I p.63 No.267b -------";

"-------- me 'poly. simpl.' Schalk I p.63 No.267b -------";

"-------- me 'poly. simpl.' Schalk I p.63 No.267b -------";

val fmz = ["Term ((5*x^^^2 + 3) * (2*x^^^7 + 3) - (3*x^^^5 + 8) * (6*x^^^4 - 1))", "normalform N"];

val (dI',pI',mI') =

  ("Poly",["polynomial","simplification"],

   ["simplification","for_polynomials"]);

val p = e_pos'; val c = []; 

val (p,_,f,nxt,_,pt) = CalcTreeTEST [(fmz, (dI',pI',mI'))];

val (p,_,f,nxt,_,pt) = me nxt p c pt;

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(writeln o (itms2str_ ctxt)) (get_obj g_pbl pt (fst p));

val (p,_,f,nxt,_,pt) = me nxt p c pt;

val (p,_,f,nxt,_,pt) = me nxt p c pt;

val (p,_,f,nxt,_,pt) = me nxt p c pt;

val (p,_,f,nxt,_,pt) = me nxt p c pt;

val (p,_,f,nxt,_,pt) = me nxt p c pt; f2str f;

val (p,_,f,nxt,_,pt) = me nxt p c pt; f2str f;

val (p,_,f,nxt,_,pt) = me nxt p c pt; f2str f;

if f2str f = "17 + 15 * x ^^^ 2 + -48 * x ^^^ 4 + 3 * x ^^^ 5 + 6 * x ^^^ 7 + -8 * x ^^^ 9"

then () else error "poly.sml diff.behav. in me Schalk I p.63 No.267b";

"-------- interSteps for Schalk 299a --------------------";

"-------- interSteps for Schalk 299a --------------------";

"-------- interSteps for Schalk 299a --------------------";

reset_states ();

CalcTree

[(["Term ((x - y)*(x + (y::real)))", "normalform N"], 

  ("Poly",["polynomial","simplification"],

  ["simplification","for_polynomials"]))];

Iterator 1;

moveActiveRoot 1;

autoCalculate' 1 CompleteCalc;

val ((pt,p),_) = get_calc 1; show_pt pt;

interSteps 1 ([1],Res)(*<ERROR> syserror in detailstep </ERROR>*);

val ((pt,p),_) = get_calc 1; show_pt pt;

if existpt' ([1,1], Frm) pt then ()

else error "poly.sml: interSteps doesnt work again 1";

interSteps 1 ([1,1],Res)(*<ERROR> syserror in detailstep </ERROR>*);

val ((pt,p),_) = get_calc 1; show_pt pt;

(*============ inhibit exn WN120316 ==============================================

if existpt' ([1,1,1], Frm) pt then ()

else error "poly.sml: interSteps doesnt work again 2";

============ inhibit exn WN120316 ==============================================*)

"-------- norm_Poly NOT COMPLETE ------------------------";

"-------- norm_Poly NOT COMPLETE ------------------------";

"-------- norm_Poly NOT COMPLETE ------------------------";

val SOME (f',_) = rewrite_set_ thy false norm_Poly 

(str2term "L = k - 2 * q + (k - 2 * q) + (k - 2 * q) + (k - 2 * q) + senkrecht + oben");

if term2str f' = "L = 2 * 2 * k + oben + 2 * -4 * q + senkrecht"

then ((*norm_Poly NOT COMPLETE -- TODO MG*))

else error "norm_Poly changed behavior";

"-------- ord_make_polynomial ---------------------------";

"-------- ord_make_polynomial ---------------------------";

"-------- ord_make_polynomial ---------------------------";

val t1 = str2term "2 * b + (3 * a + 3 * b)";

val t2 = str2term "3 * a + 3 * b + 2 * b";

if ord_make_polynomial true thy [] (t1, t2) then ()

else error "poly.sml: diff.behav. in ord_make_polynomial";

(*WN071202: ^^^ why then is there no rewriting ...*)

val term = str2term "2*b + (3*a + 3*b)";

val NONE = rewrite_set_ (@{theory "Isac"}) false order_add_mult term;

(*or why is there no rewriting this way...*)

val t1 = str2term "2 * b + (3 * a + 3 * b)";

val t2 = str2term "3 * a + (2 * b + 3 * b)";