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(* tools for integration over the reals
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author: Walther Neuper 050905, 08:51
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(c) due to copyright terms
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use"IsacKnowledge/Integrate.ML";
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use"Integrate.ML";
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remove_thy"Integrate";
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use_thy"IsacKnowledge/Isac";
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*)
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(** interface isabelle -- isac **)
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theory' := overwritel (!theory', [("Integrate.thy",Integrate.thy)]);
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theorem' := overwritel (!theorem',
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[("integral_const",num_str integral_const),
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("integral_var",num_str integral_var),
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("integral_add",num_str integral_add),
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("integral_mult",num_str integral_mult),
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("call_for_new_c",num_str call_for_new_c),
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("integral_pow",num_str integral_pow)
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]);
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(** eval functions **)
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val c = Free ("c", HOLogic.realT);
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(*.create a new unique variable 'c..' in a term; for use by Calc in a rls;
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an alternative to do this would be '(Try (Calculate new_c_) (new_c es__))'
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in the script; this will be possible if currying doesnt take the value
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from a variable, but the value '(new_c es__)' itself.*)
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fun new_c term =
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let fun selc var =
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case (explode o id_of) var of
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"c"::[] => true
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| "c"::"_"::is => (case (int_of_str o implode) is of
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Some _ => true
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| None => false)
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| _ => false;
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fun get_coeff c = case (explode o id_of) c of
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"c"::"_"::is => (the o int_of_str o implode) is
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| _ => 0;
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val cs = filter selc (vars term);
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in
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case cs of
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[] => c
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| [c] => Free ("c_2", HOLogic.realT)
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| cs =>
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let val max_coeff = maxl (map get_coeff cs)
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in Free ("c_"^string_of_int (max_coeff + 1), HOLogic.realT) end
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end;
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(*("new_c", ("Integrate.new'_c", eval_new_c "#new_c_"))*)
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fun eval_new_c _ _ (p as (Const ("Integrate.new'_c",_) $ t)) _ =
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Some ((term2str p) ^ " = " ^ term2str (new_c p),
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Trueprop $ (mk_equality (p, new_c p)))
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| eval_new_c _ _ _ _ = None;
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(*("is_f_x", ("Integrate.is'_f'_x", eval_is_f_x "is_f_x_"))*)
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fun eval_is_f_x _ _(p as (Const ("Integrate.is'_f'_x", _)
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$ arg)) _ =
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if is_f_x arg
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then Some ((term2str p) ^ " = True",
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Trueprop $ (mk_equality (p, HOLogic.true_const)))
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else Some ((term2str p) ^ " = False",
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Trueprop $ (mk_equality (p, HOLogic.false_const)))
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| eval_is_f_x _ _ _ _ = None;
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calclist':= overwritel (!calclist',
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[("new_c", ("Integrate.new'_c", eval_new_c "new_c_")),
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("is_f_x", ("Integrate.is'_f'_x", eval_is_f_x "is_f_idextifier_"))
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]);
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(** rulesets **)
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(*.rulesets for integration.*)
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val integration_rules =
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prep_rls (Rls {id="integration_rules", preconds = [],
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rew_ord = ("termlessI",termlessI),
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erls = Rls {id="conditions_in_integration_rules",
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preconds = [],
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rew_ord = ("termlessI",termlessI),
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erls = Erls,
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srls = Erls, calc = [],
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rules = [(*for rewriting conditions in Thm's*)
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Calc ("Atools.occurs'_in",
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eval_occurs_in "#occurs_in_"),
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Thm ("not_true",num_str not_true),
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Thm ("not_false",not_false)
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],
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scr = EmptyScr},
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srls = Erls, calc = [],
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rules = [
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Thm ("integral_const",num_str integral_const),
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Thm ("integral_var",num_str integral_var),
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Thm ("integral_add",num_str integral_add),
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Thm ("integral_mult",num_str integral_mult),
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Thm ("integral_pow",num_str integral_pow),
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Calc ("op +", eval_binop "#add_")(*for n+1*)
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],
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scr = EmptyScr});
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val add_new_c =
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prep_rls (Seq {id="add_new_c", preconds = [],
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rew_ord = ("termlessI",termlessI),
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erls = Rls {id="conditions_in_add_new_c",
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preconds = [],
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rew_ord = ("termlessI",termlessI),
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erls = Erls,
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srls = Erls, calc = [],
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rules = [Calc ("Tools.matches", eval_matches""),
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Calc ("Integrate.is'_f'_x",
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eval_is_f_x "is_f_x_"),
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Thm ("not_true",num_str not_true),
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Thm ("not_false",num_str not_false)
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],
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scr = EmptyScr},
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srls = Erls, calc = [],
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rules = [ Thm ("call_for_new_c", num_str call_for_new_c),
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Calc("Integrate.new'_c", eval_new_c "new_c_")
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],
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scr = EmptyScr});
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(*.rulesets for simplifying Integrals.*)
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(*.for simplify_Integral adapted from 'norm_Rational_rls'.*)
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val norm_Rational_rls_noadd_fractions = prep_rls(
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Rls {id = "norm_Rational_rls_noadd_fractions", preconds = [],
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rew_ord = ("dummy_ord",dummy_ord),
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erls = norm_rat_erls, srls = Erls, calc = [],
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rules = [(*Rls_ common_nominator_p_rls,!!!*)
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Rls_ (*rat_mult_div_pow original corrected WN051028*)
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(Rls {id = "rat_mult_div_pow", preconds = [],
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rew_ord = ("dummy_ord",dummy_ord),
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erls = (*FIXME.WN051028 e_rls,*)
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append_rls "e_rls-is_polyexp" e_rls
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[Calc ("Poly.is'_polyexp",
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eval_is_polyexp "")],
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srls = Erls, calc = [],
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rules = [Thm ("rat_mult",num_str rat_mult),
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(*"?a / ?b * (?c / ?d) = ?a * ?c / (?b * ?d)"*)
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Thm ("rat_mult_poly_l",num_str rat_mult_poly_l),
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(*"?c is_polyexp ==> ?c * (?a / ?b) = ?c * ?a / ?b"*)
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Thm ("rat_mult_poly_r",num_str rat_mult_poly_r),
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(*"?c is_polyexp ==> ?a / ?b * ?c = ?a * ?c / ?b"*)
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Thm ("real_divide_divide1_mg", real_divide_divide1_mg),
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(*"y ~= 0 ==> (u / v) / (y / z) = (u * z) / (y * v)"*)
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Thm ("real_divide_divide1_eq", real_divide_divide1_eq),
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(*"?x / (?y / ?z) = ?x * ?z / ?y"*)
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Thm ("real_divide_divide2_eq", real_divide_divide2_eq),
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(*"?x / ?y / ?z = ?x / (?y * ?z)"*)
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Calc ("HOL.divide" ,eval_cancel "#divide_"),
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Thm ("rat_power", num_str rat_power)
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(*"(?a / ?b) ^^^ ?n = ?a ^^^ ?n / ?b ^^^ ?n"*)
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],
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scr = Script ((term_of o the o (parse thy)) "empty_script")
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}),
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Rls_ make_rat_poly_with_parentheses,
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Rls_ cancel_p_rls,(*FIXME:cancel_p does NOT order sometimes*)
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Rls_ rat_reduce_1
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],
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scr = Script ((term_of o the o (parse thy)) "empty_script")
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}:rls);
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(*.for simplify_Integral adapted from 'norm_Rational'.*)
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val norm_Rational_noadd_fractions = prep_rls(
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Seq {id = "norm_Rational_noadd_fractions", preconds = [],
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rew_ord = ("dummy_ord",dummy_ord),
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erls = norm_rat_erls, srls = Erls, calc = [],
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rules = [Rls_ discard_minus_,
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Rls_ rat_mult_poly,(* removes double fractions like a/b/c *)
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Rls_ make_rat_poly_with_parentheses, (*WN0510 also in(#)below*)
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Rls_ cancel_p_rls, (*FIXME.MG:cancel_p does NOT order sometim*)
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Rls_ norm_Rational_rls_noadd_fractions,(* the main rls (#) *)
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Rls_ discard_parentheses_ (* mult only *)
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],
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scr = Script ((term_of o the o (parse thy)) "empty_script")
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}:rls);
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(*.simplify terms before and after Integration such that
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..a.x^2/2 + b.x^3/3.. is made to ..a/2.x^2 + b/3.x^3.. (and NO
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common denominator as done by norm_Rational or make_ratpoly_in.
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This is a copy from 'make_ratpoly_in' with respective reduction of rules.*)
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val simplify_Integral = prep_rls(
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Seq {id = "simplify_Integral", preconds = []:term list,
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rew_ord = ("dummy_ord", dummy_ord),
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erls = Atools_erls, srls = Erls,
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calc = [], (*asm_thm = [],*)
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rules = [Rls_ norm_Rational_noadd_fractions,
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Rls_ order_add_mult_in,
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Rls_ discard_parentheses,
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(*Rls_ collect_bdv, from make_polynomial_in*)
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Rls_ (append_rls "separate_bdv"
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collect_bdv
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[Thm ("separate_bdv", num_str separate_bdv),
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(*"?a * ?bdv / ?b = ?a / ?b * ?bdv"*)
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Thm ("separate_bdv_n", num_str separate_bdv_n),
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Thm ("separate_1_bdv", num_str separate_1_bdv),
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(*"?bdv / ?b = (1 / ?b) * ?bdv"*)
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Thm ("separate_1_bdv_n", num_str separate_1_bdv_n)(*,
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(*"?bdv ^^^ ?n / ?b = 1 / ?b * ?bdv ^^^ ?n"*)
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Thm ("real_add_divide_distrib",
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num_str real_add_divide_distrib)
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(*"(?x + ?y) / ?z = ?x / ?z + ?y / ?z"*)----------*)
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]),
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Calc ("HOL.divide" ,eval_cancel "#divide_")
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],
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scr = EmptyScr}:rls);
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(*simplify terms before and after Integration such that
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..a.x^2/2 + b.x^3/3.. is made to ..a/2.x^2 + b/3.x^3.. (and NO
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common denominator as done by norm_Rational or make_ratpoly_in.
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This is a copy from 'make_polynomial_in' with insertions from
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'make_ratpoly_in'
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THIS IS KEPT FOR COMPARISON ............................................
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val simplify_Integral = prep_rls(
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Seq {id = "", preconds = []:term list,
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rew_ord = ("dummy_ord", dummy_ord),
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erls = Atools_erls, srls = Erls,
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calc = [], (*asm_thm = [],*)
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rules = [Rls_ expand_poly,
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Rls_ order_add_mult_in,
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Rls_ simplify_power,
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Rls_ collect_numerals,
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wneuper@451
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Rls_ reduce_012,
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wneuper@451
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Thm ("realpow_oneI",num_str realpow_oneI),
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Rls_ discard_parentheses,
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Rls_ collect_bdv,
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(*below inserted from 'make_ratpoly_in'*)
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Rls_ (append_rls "separate_bdv"
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collect_bdv
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wneuper@451
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[Thm ("separate_bdv", num_str separate_bdv),
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(*"?a * ?bdv / ?b = ?a / ?b * ?bdv"*)
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wneuper@451
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Thm ("separate_bdv_n", num_str separate_bdv_n),
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Thm ("separate_1_bdv", num_str separate_1_bdv),
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(*"?bdv / ?b = (1 / ?b) * ?bdv"*)
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wneuper@451
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Thm ("separate_1_bdv_n", num_str separate_1_bdv_n)(*,
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(*"?bdv ^^^ ?n / ?b = 1 / ?b * ?bdv ^^^ ?n"*)
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Thm ("real_add_divide_distrib",
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num_str real_add_divide_distrib)
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(*"(?x + ?y) / ?z = ?x / ?z + ?y / ?z"*)*)
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]),
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Calc ("HOL.divide" ,eval_cancel "#divide_")
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],
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scr = EmptyScr
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}:rls);
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.......................................................................*)
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val integration =
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prep_rls (Seq {id="integration", preconds = [],
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rew_ord = ("termlessI",termlessI),
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erls = Rls {id="conditions_in_integration",
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preconds = [],
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rew_ord = ("termlessI",termlessI),
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erls = Erls,
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srls = Erls, calc = [],
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rules = [],
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scr = EmptyScr},
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srls = Erls, calc = [],
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rules = [ Rls_ integration_rules,
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Rls_ add_new_c,
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Rls_ simplify_Integral
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],
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scr = EmptyScr});
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ruleset' :=
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|
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overwritel (!ruleset',
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[("integration_rules", integration_rules),
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|
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("add_new_c", add_new_c),
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|
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("simplify_Integral", simplify_Integral),
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|
273 |
("integration", integration)]);
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|
274 |
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|
275 |
(** problems **)
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|
276 |
|
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|
277 |
store_pbt
|
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|
278 |
(prep_pbt Integrate.thy
|
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|
279 |
(["integrate","function"],
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|
280 |
[("#Given" ,["functionTerm f_", "integrateBy v_"]),
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|
281 |
("#Find" ,["antiDerivative F_"])
|
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|
282 |
],
|
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|
283 |
append_rls "e_rls" e_rls [(*for preds in where_*)],
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|
284 |
Some "Integrate (f_, v_)",
|
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|
285 |
[["Diff","integration"]]));
|
wneuper@339
|
286 |
|
wneuper@339
|
287 |
store_pbt
|
wneuper@339
|
288 |
(prep_pbt Integrate.thy
|
wneuper@339
|
289 |
(["named","integrate","function"],
|
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|
290 |
[("#Given" ,["functionTerm f_", "integrateBy v_"]),
|
wneuper@347
|
291 |
("#Find" ,["antiDerivativeName F_"])
|
wneuper@339
|
292 |
],
|
wneuper@339
|
293 |
append_rls "e_rls" e_rls [(*for preds in where_*)],
|
wneuper@339
|
294 |
Some "Integrate (f_, v_)",
|
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|
295 |
[["Diff","integration","named"]]));
|
wneuper@339
|
296 |
|
wneuper@339
|
297 |
(** methods **)
|
wneuper@339
|
298 |
|
wneuper@339
|
299 |
store_met
|
wneuper@339
|
300 |
(prep_met Integrate.thy
|
wneuper@339
|
301 |
(["Diff","integration"],
|
wneuper@339
|
302 |
[("#Given" ,["functionTerm f_", "integrateBy v_"]),
|
wneuper@339
|
303 |
("#Find" ,["antiDerivative F_"])
|
wneuper@339
|
304 |
],
|
wneuper@339
|
305 |
{rew_ord'="tless_true", rls'=Atools_erls, calc = [],
|
wneuper@339
|
306 |
srls = e_rls,
|
wneuper@339
|
307 |
prls=e_rls,
|
wneuper@339
|
308 |
crls = Atools_erls, nrls = e_rls},
|
wneuper@339
|
309 |
"Script IntegrationScript (f_::real) (v_::real) = \
|
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|
310 |
\ (let t_ = Take (Integral f_ D v_) \
|
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|
311 |
\ in (Rewrite_Set_Inst [(bdv,v_)] integration False) (t_::real))"
|
wneuper@339
|
312 |
));
|
wneuper@339
|
313 |
|
wneuper@339
|
314 |
store_met
|
wneuper@339
|
315 |
(prep_met Integrate.thy
|
wneuper@339
|
316 |
(["Diff","integration","named"],
|
wneuper@339
|
317 |
[("#Given" ,["functionTerm f_", "integrateBy v_"]),
|
wneuper@347
|
318 |
("#Find" ,["antiDerivativeName F_"])
|
wneuper@339
|
319 |
],
|
wneuper@339
|
320 |
{rew_ord'="tless_true", rls'=Atools_erls, calc = [],
|
wneuper@339
|
321 |
srls = e_rls,
|
wneuper@339
|
322 |
prls=e_rls,
|
wneuper@339
|
323 |
crls = Atools_erls, nrls = e_rls},
|
wneuper@347
|
324 |
"Script NamedIntegrationScript (f_::real) (v_::real) (F_::real=>real) = \
|
wneuper@347
|
325 |
\ (let t_ = Take (F_ v_ = Integral f_ D v_) \
|
wneuper@339
|
326 |
\ in (Rewrite_Set_Inst [(bdv,v_)] integration False) t_)"
|
wneuper@339
|
327 |
));
|
wneuper@339
|
328 |
|