neuper@37906
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(* collecting all knowledge for Root and Rational Equations
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created by: rlang
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date: 02.10
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changed by: rlang
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last change by: rlang
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date: 02.11.04
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(c) by Richard Lang, 2003
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*)
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theory RootRatEq imports LinEq RootEq RatEq RootRat begin
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text {* univariate equations over rational terms containing real square roots:
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In 2003 this type has been developed as part of ISAC's equation solver
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by Richard Lang in 2003.
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The migration Isabelle2002 --> 2011 dropped this type of equation, see RootEq.thy.
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*}
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consts
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is'_rootRatAddTerm'_in :: "[real, real] => bool"
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("_ is'_rootRatAddTerm'_in _") (*RL DA*)
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(*---------scripts--------------------------*)
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Elim'_rootrat'_equation
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:: "[bool,real,
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bool list] => bool list"
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("((Script Elim'_rootrat'_equation (_ _ =))//
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(_))" 9)
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(*-------------------- rules------------------------------------------------*)
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axiomatization where
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(* eliminate ratRootTerm *)
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rootrat_equation_left_1:
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"[|c is_rootTerm_in bdv|] ==> ( (a + b/c = d) = ( b = (d - a) * c ))" and
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rootrat_equation_left_2:
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"[|c is_rootTerm_in bdv|] ==> ( (b/c = d) = ( b = d * c ))" and
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rootrat_equation_right_2:
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"[|f is_rootTerm_in bdv|] ==> ( (a = d + e/f) = ( (a - d) * f = e ))" and
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rootrat_equation_right_1:
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"[|f is_rootTerm_in bdv|] ==> ( (a = e/f) = ( a * f = e ))"
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ML {*
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val thy = @{theory};
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(*-------------------------functions---------------------*)
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(* true if denominator contains (sq)root in + or - term
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1/(sqrt(x+3)*(x+4)) -> false; 1/(sqrt(x)+2) -> true
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if false then (term)^2 contains no (sq)root *)
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fun is_rootRatAddTerm_in t v =
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let
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fun coeff_in c v = member op = (vars c) v;
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fun rootadd (t as (Const ("Groups.plus_class.plus",_) $ t2 $ t3)) v =
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(is_rootTerm_in t2 v) orelse (is_rootTerm_in t3 v)
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| rootadd (t as (Const ("Groups.minus_class.minus",_) $ t2 $ t3)) v =
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(is_rootTerm_in t2 v) orelse (is_rootTerm_in t3 v)
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| rootadd _ _ = false;
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fun findrootrat (_ $ _ $ _ $ _) v = error("is_rootRatAddTerm_in:")
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(* at the moment there is no term like this, but ....*)
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| findrootrat (t as (Const ("Fields.inverse_class.divide",_) $ _ $ t3)) v =
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if (is_rootTerm_in t3 v) then rootadd t3 v else false
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| findrootrat (_ $ t1 $ t2) v =
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(findrootrat t1 v) orelse (findrootrat t2 v)
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| findrootrat (_ $ t1) v = (findrootrat t1 v)
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| findrootrat _ _ = false;
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in
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findrootrat t v
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end;
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fun eval_is_rootRatAddTerm_in _ _
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(p as (Const ("RootRatEq.is'_rootRatAddTerm'_in",_) $ t $ v)) _ =
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if is_rootRatAddTerm_in t v then
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SOME ((term2str p) ^ " = True",
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Trueprop $ (mk_equality (p, @{term True})))
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else SOME ((term2str p) ^ " = True",
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Trueprop $ (mk_equality (p, @{term False})))
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| eval_is_rootRatAddTerm_in _ _ _ _ = ((*tracing"### nichts matcht";*) NONE);
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*}
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ML {*
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(*-------------------------rulse-------------------------*)
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val RootRatEq_prls =
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append_rls "RootRatEq_prls" e_rls
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[Calc ("Atools.ident",eval_ident "#ident_"),
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Calc ("Tools.matches",eval_matches ""),
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Calc ("Tools.lhs" ,eval_lhs ""),
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Calc ("Tools.rhs" ,eval_rhs ""),
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Calc ("RootEq.is'_rootTerm'_in",eval_is_rootTerm_in ""),
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Calc ("RootRatEq.is'_rootRatAddTerm'_in",
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eval_is_rootRatAddTerm_in ""),
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Calc ("HOL.eq",eval_equal "#equal_"),
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Thm ("not_true",num_str @{thm not_true}),
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Thm ("not_false",num_str @{thm not_false}),
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Thm ("and_true",num_str @{thm and_true}),
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Thm ("and_false",num_str @{thm and_false}),
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Thm ("or_true",num_str @{thm or_true}),
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Thm ("or_false",num_str @{thm or_false})
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];
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val RooRatEq_erls =
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merge_rls "RooRatEq_erls" rootrat_erls
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(merge_rls "" RootEq_erls
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(merge_rls "" rateq_erls
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(append_rls "" e_rls
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[])));
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val RootRatEq_crls =
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merge_rls "RootRatEq_crls" rootrat_erls
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(merge_rls "" RootEq_erls
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(merge_rls "" rateq_erls
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(append_rls "" e_rls
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[])));
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*}
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setup {* KEStore_Elems.add_rlss
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[("RooRatEq_erls", (Context.theory_name @{theory}, RooRatEq_erls))] *}
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ML {*
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(* Solves a rootrat Equation *)
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val rootrat_solve = prep_rls(
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Rls {id = "rootrat_solve", preconds = [],
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rew_ord = ("termlessI",termlessI),
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erls = e_rls, srls = Erls, calc = [], errpatts = [],
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rules =
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[Thm("rootrat_equation_left_1", num_str @{thm rootrat_equation_left_1}),
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(* [|c is_rootTerm_in bdv|] ==>
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( (a + b/c = d) = ( b = (d - a) * c )) *)
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Thm("rootrat_equation_left_2",num_str @{thm rootrat_equation_left_2}),
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(* [|c is_rootTerm_in bdv|] ==> ( (b/c = d) = ( b = d * c )) *)
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Thm("rootrat_equation_right_1",num_str @{thm rootrat_equation_right_1}),
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(* [|f is_rootTerm_in bdv|] ==>
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( (a = d + e/f) = ( (a - d) * f = e )) *)
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Thm("rootrat_equation_right_2",num_str @{thm rootrat_equation_right_2})
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(* [|f is_rootTerm_in bdv|] ==> ( (a = e/f) = ( a * f = e ))*)
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], scr = Prog ((term_of o the o (parse thy)) "empty_script")}:rls);
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*}
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setup {* KEStore_Elems.add_rlss
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[("rootrat_solve", (Context.theory_name @{theory}, rootrat_solve))] *}
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ML {*
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(*-----------------------probleme------------------------*)
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(*
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(get_pbt ["rat","root'","univariate","equation"]);
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show_ptyps();
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*)
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store_pbt
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(prep_pbt thy "pbl_equ_univ_root_sq_rat" [] e_pblID
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(["rat","sq","root'","univariate","equation"],
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[("#Given" ,["equality e_e","solveFor v_v"]),
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("#Where" ,["( (lhs e_e) is_rootRatAddTerm_in (v_v::real) )| " ^
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"( (rhs e_e) is_rootRatAddTerm_in (v_v::real) )"]),
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("#Find" ,["solutions v_v'i'"])
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],
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RootRatEq_prls, SOME "solve (e_e::bool, v_v)",
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[["RootRatEq","elim_rootrat_equation"]]));
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*}
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setup {* KEStore_Elems.add_pbts
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[(prep_pbt thy "pbl_equ_univ_root_sq_rat" [] e_pblID
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(["rat","sq","root'","univariate","equation"],
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[("#Given" ,["equality e_e","solveFor v_v"]),
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("#Where" ,["( (lhs e_e) is_rootRatAddTerm_in (v_v::real) )| " ^
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"( (rhs e_e) is_rootRatAddTerm_in (v_v::real) )"]),
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("#Find" ,["solutions v_v'i'"])],
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RootRatEq_prls, SOME "solve (e_e::bool, v_v)", [["RootRatEq","elim_rootrat_equation"]]))] *}
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ML {*
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(*-------------------------Methode-----------------------*)
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store_met
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(prep_met @{theory LinEq} "met_rootrateq" [] e_metID
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(["RootRatEq"],
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[],
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{rew_ord'="tless_true",rls'=Atools_erls,calc = [], srls = e_rls, prls=e_rls,
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crls=Atools_erls, errpats = [], nrls = norm_Rational}, "empty_script"));
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(*-- left 20.10.02 --*)
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store_met
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(prep_met thy "met_rootrateq_elim" [] e_metID
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(["RootRatEq","elim_rootrat_equation"],
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[("#Given" ,["equality e_e","solveFor v_v"]),
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("#Where" ,["( (lhs e_e) is_rootRatAddTerm_in (v_v::real) ) | " ^
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"( (rhs e_e) is_rootRatAddTerm_in (v_v::real) )"]),
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("#Find" ,["solutions v_v'i'"])
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],
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{rew_ord'="termlessI",
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rls'=RooRatEq_erls,
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srls=e_rls,
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prls=RootRatEq_prls,
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calc=[],
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crls=RootRatEq_crls, errpats = [], nrls = norm_Rational},
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"Script Elim_rootrat_equation (e_e::bool) (v_v::real) = " ^
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"(let e_e = ((Try (Rewrite_Set expand_rootbinoms False)) @@ " ^
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" (Try (Rewrite_Set rooteq_simplify False)) @@ " ^
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" (Try (Rewrite_Set make_rooteq False)) @@ " ^
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" (Try (Rewrite_Set rooteq_simplify False)) @@ " ^
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" (Try (Rewrite_Set_Inst [(bdv,v_v)] " ^
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" rootrat_solve False))) e_e " ^
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" in (SubProblem (RootEq',[univariate,equation], " ^
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" [no_met]) [BOOL e_e, REAL v_v]))"
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));
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*}
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setup {* KEStore_Elems.add_calcs
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[("is_rootRatAddTerm_in", ("RootRatEq.is_rootRatAddTerm_in", eval_is_rootRatAddTerm_in""))] *}
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end
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