clarified command name: this is to register already defined rule sets in the Knowledge Store;
1 (* differentiation over the reals
6 theory Diff imports Calculus Trig LogExp Rational Root Poly Base_Tools begin
14 d_d :: "[real, real]=> real"
16 (*descriptions in the related problems*)
17 derivativeEq :: "bool => una"
20 primed :: "'a => 'a" (*"primed A" -> "A'"*)
22 (*the CAS-commands, eg. "Diff (2*x \<up> 3, x)",
23 "Differentiate (A = s * (a - s), s)"*)
24 Diff :: "[real * real] => real"
25 Differentiate :: "[bool * real] => bool"
28 differentiate :: "[char list * char list list * char list, real, real] => real"
29 ("(differentiate (_)/ (_ _ ))" 9)
31 text \<open>a variant of the derivatives defintion:
33 d_d :: "(real => real) => (real => real)"
36 (1) no variable 'bdv' on the meta-level required
37 (2) chain_rule "d_d (%x. (u (v x))) = (%x. (d_d u)) (v x) * d_d v"
38 (3) and no specialized chain-rules required like
39 diff_sin_chain "d_d bdv (sin u) = cos u * d_d bdv u"
41 disadvantage: d_d (%x. 1 + x^2) = ... differs from high-school notation
44 axiomatization where (*stated as axioms, todo: prove as theorems
45 'bdv' is a constant on the meta-level *)
46 diff_const: "[| Not (bdv occurs_in a) |] ==> d_d bdv a = 0" and
47 diff_var: "d_d bdv bdv = 1" and
48 diff_prod_const:"[| Not (bdv occurs_in u) |] ==>
49 d_d bdv (u * v) = u * d_d bdv v" and
51 diff_sum: "d_d bdv (u + v) = d_d bdv u + d_d bdv v" and
52 diff_dif: "d_d bdv (u - v) = d_d bdv u - d_d bdv v" and
53 diff_prod: "d_d bdv (u * v) = d_d bdv u * v + u * d_d bdv v" and
54 diff_quot: "Not (v = 0) ==> (d_d bdv (u / v) =
55 (d_d bdv u * v - u * d_d bdv v) / v \<up> 2)" and
57 diff_sin: "d_d bdv (sin bdv) = cos bdv" and
58 diff_sin_chain: "d_d bdv (sin u) = cos u * d_d bdv u" and
59 diff_cos: "d_d bdv (cos bdv) = - sin bdv" and
60 diff_cos_chain: "d_d bdv (cos u) = - sin u * d_d bdv u" and
61 diff_pow: "d_d bdv (bdv \<up> n) = n * (bdv \<up> (n - 1))" and
62 diff_pow_chain: "d_d bdv (u \<up> n) = n * (u \<up> (n - 1)) * d_d bdv u" and
63 diff_ln: "d_d bdv (ln bdv) = 1 / bdv" and
64 diff_ln_chain: "d_d bdv (ln u) = d_d bdv u / u" and
65 diff_exp: "d_d bdv (exp bdv) = exp bdv" and
66 diff_exp_chain: "d_d bdv (exp u) = exp u * d_d x u" and
68 diff_sqrt "d_d bdv (sqrt bdv) = 1 / (2 * sqrt bdv)"
69 diff_sqrt_chain"d_d bdv (sqrt u) = d_d bdv u / (2 * sqrt u)"
73 frac_conv: "[| bdv occurs_in b; 0 < n |] ==>
74 a / (b \<up> n) = a * b \<up> (-n)" and
75 frac_sym_conv: "n < 0 ==> a * b \<up> n = a / b \<up> (-n)" and
77 sqrt_conv_bdv: "sqrt bdv = bdv \<up> (1 / 2)" and
78 sqrt_conv_bdv_n: "sqrt (bdv \<up> n) = bdv \<up> (n / 2)" and
79 (*Ambiguous input\<^here> produces 3 parse trees -----------------------------\\*)
80 sqrt_conv: "bdv occurs_in u ==> sqrt u = u \<up> (1 / 2)" and
81 (*Ambiguous input\<^here> produces 3 parse trees -----------------------------//*)
82 sqrt_sym_conv: "u \<up> (a / 2) = sqrt (u \<up> a)" and
84 root_conv: "bdv occurs_in u ==> nroot n u = u \<up> (1 / n)" and
85 root_sym_conv: "u \<up> (a / b) = nroot b (u \<up> a)" and
87 realpow_pow_bdv: "(bdv \<up> b) \<up> c = bdv \<up> (b * c)"
92 (** eval functions **)
94 fun primed (Const (id, T)) = Const (id ^ "'", T)
95 | primed (Free (id, T)) = Free (id ^ "'", T)
96 | primed t = raise ERROR ("primed called with arg = '"^ UnparseC.term t ^"'");
98 (*("primed", ("Diff.primed", eval_primed "#primed"))*)
99 fun eval_primed _ _ (p as (Const ("Diff.primed",_) $ t)) _ =
100 SOME ((UnparseC.term p) ^ " = " ^ UnparseC.term (primed t),
101 HOLogic.Trueprop $ (TermC.mk_equality (p, primed t)))
102 | eval_primed _ _ _ _ = NONE;
104 setup \<open>KEStore_Elems.add_calcs
105 [("primed", ("Diff.primed", eval_primed "#primed"))]\<close>
109 (*.converts a term such that differentiation works optimally.*)
111 Rule_Def.Repeat {id="diff_conv",
113 rew_ord = ("termlessI",termlessI),
114 erls = Rule_Set.append_rules "erls_diff_conv" Rule_Set.empty
115 [Rule.Eval ("Prog_Expr.occurs_in", Prog_Expr.eval_occurs_in ""),
116 Rule.Thm ("not_true",ThmC.numerals_to_Free @{thm not_true}),
117 Rule.Thm ("not_false",ThmC.numerals_to_Free @{thm not_false}),
118 Rule.Eval ("Orderings.ord_class.less", Prog_Expr.eval_equ "#less_"),
119 Rule.Thm ("and_true",ThmC.numerals_to_Free @{thm and_true}),
120 Rule.Thm ("and_false",ThmC.numerals_to_Free @{thm and_false})
122 srls = Rule_Set.Empty, calc = [], errpatts = [],
124 [Rule.Thm ("frac_conv", ThmC.numerals_to_Free @{thm frac_conv}),
125 (*"?bdv occurs_in ?b \<Longrightarrow> 0 < ?n \<Longrightarrow> ?a / ?b \<up> ?n = ?a * ?b \<up> - ?n"*)
126 Rule.Thm ("sqrt_conv_bdv", ThmC.numerals_to_Free @{thm sqrt_conv_bdv}),
127 (*"sqrt ?bdv = ?bdv \<up> (1 / 2)"*)
128 Rule.Thm ("sqrt_conv_bdv_n", ThmC.numerals_to_Free @{thm sqrt_conv_bdv_n}),
129 (*"sqrt (?bdv \<up> ?n) = ?bdv \<up> (?n / 2)"*)
130 Rule.Thm ("sqrt_conv", ThmC.numerals_to_Free @{thm sqrt_conv}),
131 (*"?bdv occurs_in ?u \<Longrightarrow> sqrt ?u = ?u \<up> (1 / 2)"*)
132 Rule.Thm ("root_conv", ThmC.numerals_to_Free @{thm root_conv}),
133 (*"?bdv occurs_in ?u \<Longrightarrow> nroot ?n ?u = ?u \<up> (1 / ?n)"*)
134 Rule.Thm ("realpow_pow_bdv", ThmC.numerals_to_Free @{thm realpow_pow_bdv}),
135 (* "(?bdv \<up> ?b) \<up> ?c = ?bdv \<up> (?b * ?c)"*)
136 Rule.Eval ("Groups.times_class.times", (**)eval_binop "#mult_"),
137 Rule.Thm ("rat_mult",ThmC.numerals_to_Free @{thm rat_mult}),
138 (*a / b * (c / d) = a * c / (b * d)*)
139 Rule.Thm ("times_divide_eq_right",ThmC.numerals_to_Free @{thm times_divide_eq_right}),
140 (*?x * (?y / ?z) = ?x * ?y / ?z*)
141 Rule.Thm ("times_divide_eq_left",ThmC.numerals_to_Free @{thm times_divide_eq_left})
142 (*?y / ?z * ?x = ?y * ?x / ?z*)
144 scr = Rule.Empty_Prog};
147 (*.beautifies a term after differentiation.*)
149 Rule_Def.Repeat {id="diff_sym_conv",
151 rew_ord = ("termlessI",termlessI),
152 erls = Rule_Set.append_rules "erls_diff_sym_conv" Rule_Set.empty
153 [Rule.Eval ("Orderings.ord_class.less", Prog_Expr.eval_equ "#less_")
155 srls = Rule_Set.Empty, calc = [], errpatts = [],
156 rules = [Rule.Thm ("frac_sym_conv", ThmC.numerals_to_Free @{thm frac_sym_conv}),
157 Rule.Thm ("sqrt_sym_conv", ThmC.numerals_to_Free @{thm sqrt_sym_conv}),
158 Rule.Thm ("root_sym_conv", ThmC.numerals_to_Free @{thm root_sym_conv}),
159 Rule.Thm ("sym_real_mult_minus1",
160 ThmC.numerals_to_Free (@{thm real_mult_minus1} RS @{thm sym})),
162 Rule.Thm ("rat_mult",ThmC.numerals_to_Free @{thm rat_mult}),
163 (*a / b * (c / d) = a * c / (b * d)*)
164 Rule.Thm ("times_divide_eq_right",ThmC.numerals_to_Free @{thm times_divide_eq_right}),
165 (*?x * (?y / ?z) = ?x * ?y / ?z*)
166 Rule.Thm ("times_divide_eq_left",ThmC.numerals_to_Free @{thm times_divide_eq_left}),
167 (*?y / ?z * ?x = ?y * ?x / ?z*)
168 Rule.Eval ("Groups.times_class.times", (**)eval_binop "#mult_")
170 scr = Rule.Empty_Prog};
174 Rule_Def.Repeat {id="srls_differentiate..",
176 rew_ord = ("termlessI",termlessI),
177 erls = Rule_Set.empty,
178 srls = Rule_Set.Empty, calc = [], errpatts = [],
179 rules = [Rule.Eval("Prog_Expr.lhs", Prog_Expr.eval_lhs "eval_lhs_"),
180 Rule.Eval("Prog_Expr.rhs", Prog_Expr.eval_rhs "eval_rhs_"),
181 Rule.Eval("Diff.primed", eval_primed "Diff.primed")
183 scr = Rule.Empty_Prog};
188 Rule_Set.append_rules "erls_differentiate.." Rule_Set.empty
189 [Rule.Thm ("not_true",ThmC.numerals_to_Free @{thm not_true}),
190 Rule.Thm ("not_false",ThmC.numerals_to_Free @{thm not_false}),
192 Rule.Eval ("Prog_Expr.ident", Prog_Expr.eval_ident "#ident_"),
193 Rule.Eval ("Prog_Expr.is_atom", Prog_Expr.eval_is_atom "#is_atom_"),
194 Rule.Eval ("Prog_Expr.occurs_in", Prog_Expr.eval_occurs_in ""),
195 Rule.Eval ("Prog_Expr.is_const", Prog_Expr.eval_const "#is_const_")
198 (*.rules for differentiation, _no_ simplification.*)
200 Rule_Def.Repeat {id="diff_rules", preconds = [], rew_ord = ("termlessI",termlessI),
201 erls = erls_diff, srls = Rule_Set.Empty, calc = [], errpatts = [],
202 rules = [Rule.Thm ("diff_sum",ThmC.numerals_to_Free @{thm diff_sum}),
203 Rule.Thm ("diff_dif",ThmC.numerals_to_Free @{thm diff_dif}),
204 Rule.Thm ("diff_prod_const",ThmC.numerals_to_Free @{thm diff_prod_const}),
205 Rule.Thm ("diff_prod",ThmC.numerals_to_Free @{thm diff_prod}),
206 Rule.Thm ("diff_quot",ThmC.numerals_to_Free @{thm diff_quot}),
207 Rule.Thm ("diff_sin",ThmC.numerals_to_Free @{thm diff_sin}),
208 Rule.Thm ("diff_sin_chain",ThmC.numerals_to_Free @{thm diff_sin_chain}),
209 Rule.Thm ("diff_cos",ThmC.numerals_to_Free @{thm diff_cos}),
210 Rule.Thm ("diff_cos_chain",ThmC.numerals_to_Free @{thm diff_cos_chain}),
211 Rule.Thm ("diff_pow",ThmC.numerals_to_Free @{thm diff_pow}),
212 Rule.Thm ("diff_pow_chain",ThmC.numerals_to_Free @{thm diff_pow_chain}),
213 Rule.Thm ("diff_ln",ThmC.numerals_to_Free @{thm diff_ln}),
214 Rule.Thm ("diff_ln_chain",ThmC.numerals_to_Free @{thm diff_ln_chain}),
215 Rule.Thm ("diff_exp",ThmC.numerals_to_Free @{thm diff_exp}),
216 Rule.Thm ("diff_exp_chain",ThmC.numerals_to_Free @{thm diff_exp_chain}),
218 Rule.Thm ("diff_sqrt",ThmC.numerals_to_Free @{thm diff_sqrt}),
219 Rule.Thm ("diff_sqrt_chain",ThmC.numerals_to_Free @{thm diff_sqrt_chain}),
221 Rule.Thm ("diff_const",ThmC.numerals_to_Free @{thm diff_const}),
222 Rule.Thm ("diff_var",ThmC.numerals_to_Free @{thm diff_var})
224 scr = Rule.Empty_Prog};
227 (*.normalisation for checking user-input.*)
230 {id="norm_diff", preconds = [], rew_ord = ("termlessI",termlessI),
231 erls = Rule_Set.Empty, srls = Rule_Set.Empty, calc = [], errpatts = [],
232 rules = [Rule.Rls_ diff_rules, Rule.Rls_ norm_Poly ],
233 scr = Rule.Empty_Prog};
236 erls_diff = \<open>prep_rls' erls_diff\<close> and
237 diff_rules = \<open>prep_rls' diff_rules\<close> and
238 norm_diff = \<open>prep_rls' norm_diff\<close> and
239 diff_conv = \<open>prep_rls' diff_conv\<close> and
240 diff_sym_conv = \<open>prep_rls' diff_sym_conv\<close>
242 (** problem types **)
243 setup \<open>KEStore_Elems.add_pbts
244 [(Problem.prep_input thy "pbl_fun" [] Problem.id_empty (["function"], [], Rule_Set.empty, NONE, [])),
245 (Problem.prep_input thy "pbl_fun_deriv" [] Problem.id_empty
246 (["derivative_of", "function"],
247 [("#Given" ,["functionTerm f_f", "differentiateFor v_v"]),
248 ("#Find" ,["derivative f_f'"])],
249 Rule_Set.append_rules "empty" Rule_Set.empty [],
250 SOME "Diff (f_f, v_v)", [["diff", "differentiate_on_R"],
251 ["diff", "after_simplification"]])),
252 (*here "named" is used differently from Integration"*)
253 (Problem.prep_input thy "pbl_fun_deriv_nam" [] Problem.id_empty
254 (["named", "derivative_of", "function"],
255 [("#Given" ,["functionEq f_f", "differentiateFor v_v"]),
256 ("#Find" ,["derivativeEq f_f'"])],
257 Rule_Set.append_rules "empty" Rule_Set.empty [],
258 SOME "Differentiate (f_f, v_v)",
259 [["diff", "differentiate_equality"]]))]\<close>
264 (*.handle cas-input like "Diff (a * x^3 + b, x)".*)
265 (* val (t, pairl) = strip_comb (str2term "Diff (a * x^3 + b, x)");
266 val [Const ("Product_Type.Pair", _) $ t $ bdv] = pairl;
268 fun argl2dtss [Const ("Product_Type.Pair", _) $ t $ bdv] =
269 [((Thm.term_of o the o (TermC.parse thy)) "functionTerm", [t]),
270 ((Thm.term_of o the o (TermC.parse thy)) "differentiateFor", [bdv]),
271 ((Thm.term_of o the o (TermC.parse thy)) "derivative",
272 [(Thm.term_of o the o (TermC.parse thy)) "f_f'"])
274 | argl2dtss _ = raise ERROR "Diff.ML: wrong argument for argl2dtss";
276 setup \<open>KEStore_Elems.add_mets
277 [MethodC.prep_input thy "met_diff" [] MethodC.id_empty
279 {rew_ord'="tless_true",rls'=Atools_erls,calc = [], srls = Rule_Set.empty, prls=Rule_Set.empty,
280 crls = Atools_erls, errpats = [], nrls = norm_diff},
284 partial_function (tailrec) differentiate_on_R :: "real \<Rightarrow> real \<Rightarrow> real"
286 "differentiate_on_R f_f v_v = (
288 f_f' = Take (d_d v_v f_f)
290 (Try (Rewrite_Set_Inst [(''bdv'',v_v)] ''diff_conv'')) #> (
292 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_sum'')) Or
293 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_prod_const'')) Or
294 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_prod'')) Or
295 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_quot'')) Or
296 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_sin'')) Or
297 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_sin_chain'')) Or
298 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_cos'')) Or
299 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_cos_chain'')) Or
300 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_pow'')) Or
301 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_pow_chain'')) Or
302 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_ln'')) Or
303 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_ln_chain'')) Or
304 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_exp'')) Or
305 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_exp_chain'')) Or
306 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_const'')) Or
307 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_var'')) Or
308 (Repeat (Rewrite_Set ''make_polynomial'')))) #> (
309 Try (Rewrite_Set_Inst [(''bdv'',v_v)] ''diff_sym_conv''))
311 setup \<open>KEStore_Elems.add_mets
312 [MethodC.prep_input thy "met_diff_onR" [] MethodC.id_empty
313 (["diff", "differentiate_on_R"],
314 [("#Given" ,["functionTerm f_f", "differentiateFor v_v"]),
315 ("#Find" ,["derivative f_f'"])],
316 {rew_ord'="tless_true", rls' = erls_diff, calc = [], srls = Rule_Set.empty, prls=Rule_Set.empty,
317 crls = Atools_erls, errpats = [], nrls = norm_diff},
318 @{thm differentiate_on_R.simps})]
321 partial_function (tailrec) differentiateX :: "real \<Rightarrow> real \<Rightarrow> real"
323 "differentiateX f_f v_v = (
325 f_f' = Take (d_d v_v f_f)
328 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_sum'')) Or
329 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_prod_const'' )) Or
330 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_prod'')) Or
331 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_quot'')) Or
332 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_sin'')) Or
333 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_sin_chain'')) Or
334 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_cos'')) Or
335 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_cos_chain'')) Or
336 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_pow'')) Or
337 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_pow_chain'')) Or
338 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_ln'')) Or
339 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_ln_chain'')) Or
340 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_exp'')) Or
341 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_exp_chain'')) Or
342 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_const'')) Or
343 (Repeat (Rewrite_Inst [(''bdv'',v_v)] ''diff_var'')) Or
344 (Repeat (Rewrite_Set ''make_polynomial'')))
346 setup \<open>KEStore_Elems.add_mets
347 [MethodC.prep_input thy "met_diff_simpl" [] MethodC.id_empty
348 (["diff", "diff_simpl"],
349 [("#Given", ["functionTerm f_f", "differentiateFor v_v"]),
350 ("#Find" , ["derivative f_f'"])],
351 {rew_ord'="tless_true", rls' = erls_diff, calc = [], srls = Rule_Set.empty, prls=Rule_Set.empty,
352 crls = Atools_erls, errpats = [], nrls = norm_diff},
353 @{thm differentiateX.simps})]
356 partial_function (tailrec) differentiate_equality :: "bool \<Rightarrow> real \<Rightarrow> bool"
358 "differentiate_equality f_f v_v = (
360 f_f' = Take ((primed (lhs f_f)) = d_d v_v (rhs f_f))
362 (Try (Rewrite_Set_Inst [(''bdv'',v_v)] ''diff_conv'' )) #> (
364 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_sum'')) Or
365 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_dif'' )) Or
366 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_prod_const'')) Or
367 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_prod'')) Or
368 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_quot'')) Or
369 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_sin'')) Or
370 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_sin_chain'')) Or
371 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_cos'')) Or
372 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_cos_chain'')) Or
373 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_pow'')) Or
374 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_pow_chain'')) Or
375 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_ln'')) Or
376 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_ln_chain'')) Or
377 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_exp'')) Or
378 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_exp_chain'')) Or
379 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_const'')) Or
380 (Repeat (Rewrite_Inst [(''bdv'', v_v)] ''diff_var'')) Or
381 (Repeat (Rewrite_Set ''make_polynomial'')))) #> (
382 Try (Rewrite_Set_Inst [(''bdv'', v_v)] ''diff_sym_conv'' ))
384 setup \<open>KEStore_Elems.add_mets
385 [MethodC.prep_input thy "met_diff_equ" [] MethodC.id_empty
386 (["diff", "differentiate_equality"],
387 [("#Given" ,["functionEq f_f", "differentiateFor v_v"]),
388 ("#Find" ,["derivativeEq f_f'"])],
389 {rew_ord'="tless_true", rls' = erls_diff, calc = [], srls = srls_diff, prls=Rule_Set.empty,
390 crls=Atools_erls, errpats = [], nrls = norm_diff},
391 @{thm differentiate_equality.simps})]
394 partial_function (tailrec) simplify_derivative :: "real \<Rightarrow> real \<Rightarrow> real"
396 "simplify_derivative term bound_variable = (
398 term' = Take (d_d bound_variable term)
400 (Try (Rewrite_Set ''norm_Rational'')) #>
401 (Try (Rewrite_Set_Inst [(''bdv'', bound_variable)] ''diff_conv'')) #>
402 (Try (Rewrite_Set_Inst [(''bdv'', bound_variable)] ''norm_diff'')) #>
403 (Try (Rewrite_Set_Inst [(''bdv'', bound_variable)] ''diff_sym_conv'')) #>
404 (Try (Rewrite_Set ''norm_Rational''))
407 setup \<open>KEStore_Elems.add_mets
408 [MethodC.prep_input thy "met_diff_after_simp" [] MethodC.id_empty
409 (["diff", "after_simplification"],
410 [("#Given" ,["functionTerm term", "differentiateFor bound_variable"]),
411 ("#Find" ,["derivative term'"])],
412 {rew_ord'="tless_true", rls' = Rule_Set.empty, calc = [], srls = Rule_Set.empty, prls=Rule_Set.empty,
413 crls=Atools_erls, errpats = [], nrls = norm_Rational},
414 @{thm simplify_derivative.simps})]
416 setup \<open>KEStore_Elems.add_cas
417 [((Thm.term_of o the o (TermC.parse thy)) "Diff",
418 (("Isac_Knowledge", ["derivative_of", "function"], ["no_met"]), argl2dtss))]\<close>
421 (*.handle cas-input like "Differentiate (A = s * (a - s), s)".*)
422 (* val (t, pairl) = strip_comb (str2term "Differentiate (A = s * (a - s), s)");
423 val [Const ("Product_Type.Pair", _) $ t $ bdv] = pairl;
425 fun argl2dtss [Const ("Product_Type.Pair", _) $ t $ bdv] =
426 [((Thm.term_of o the o (TermC.parse thy)) "functionEq", [t]),
427 ((Thm.term_of o the o (TermC.parse thy)) "differentiateFor", [bdv]),
428 ((Thm.term_of o the o (TermC.parse thy)) "derivativeEq",
429 [(Thm.term_of o the o (TermC.parse thy)) "f_f'::bool"])
431 | argl2dtss _ = raise ERROR "Diff.ML: wrong argument for argl2dtss";
433 setup \<open>KEStore_Elems.add_cas
434 [((Thm.term_of o the o (TermC.parse thy)) "Differentiate",
435 (("Isac_Knowledge", ["named", "derivative_of", "function"], ["no_met"]), argl2dtss))]