dvres3a - Metamath Proof Explorer

	Metamath Proof Explorer		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > dvres3a		Structured version Visualization version GIF version

Theorem dvres3a 25949

Description: Restriction of a complex differentiable function to the reals. This version of dvres3 25948 assumes that 𝐹 is differentiable on its domain, but does not require 𝐹 to be differentiable on the whole real line. (Contributed by Mario Carneiro, 11-Feb-2015.)

**Hypothesis**
Ref	Expression
dvres3a.j	⊢ 𝐽 = (TopOpen‘ℂ_fld)

**Assertion**
Ref	Expression
dvres3a	⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → (𝑆 D (𝐹 ↾ 𝑆)) = ((ℂ D 𝐹) ↾ 𝑆))

**Proof of Theorem dvres3a**
Step	Hyp	Ref	Expression
1		reldv 25905	. . 3 ⊢ Rel (𝑆 D (𝐹 ↾ 𝑆))
2		recnprss 25939	. . . . . 6 ⊢ (𝑆 ∈ {ℝ, ℂ} → 𝑆 ⊆ ℂ)
3	2	ad2antrr 726	. . . . 5 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → 𝑆 ⊆ ℂ)
4		simplr 769	. . . . . . 7 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → 𝐹:𝐴⟶ℂ)
5		inss2 4238	. . . . . . 7 ⊢ (𝑆 ∩ 𝐴) ⊆ 𝐴
6		fssres 6774	. . . . . . 7 ⊢ ((𝐹:𝐴⟶ℂ ∧ (𝑆 ∩ 𝐴) ⊆ 𝐴) → (𝐹 ↾ (𝑆 ∩ 𝐴)):(𝑆 ∩ 𝐴)⟶ℂ)
7	4, 5, 6	sylancl 586	. . . . . 6 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → (𝐹 ↾ (𝑆 ∩ 𝐴)):(𝑆 ∩ 𝐴)⟶ℂ)
8		rescom 6020	. . . . . . . . 9 ⊢ ((𝐹 ↾ 𝐴) ↾ 𝑆) = ((𝐹 ↾ 𝑆) ↾ 𝐴)
9		resres 6010	. . . . . . . . 9 ⊢ ((𝐹 ↾ 𝑆) ↾ 𝐴) = (𝐹 ↾ (𝑆 ∩ 𝐴))
10	8, 9	eqtri 2765	. . . . . . . 8 ⊢ ((𝐹 ↾ 𝐴) ↾ 𝑆) = (𝐹 ↾ (𝑆 ∩ 𝐴))
11		ffn 6736	. . . . . . . . . 10 ⊢ (𝐹:𝐴⟶ℂ → 𝐹 Fn 𝐴)
12		fnresdm 6687	. . . . . . . . . 10 ⊢ (𝐹 Fn 𝐴 → (𝐹 ↾ 𝐴) = 𝐹)
13	4, 11, 12	3syl 18	. . . . . . . . 9 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → (𝐹 ↾ 𝐴) = 𝐹)
14	13	reseq1d 5996	. . . . . . . 8 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → ((𝐹 ↾ 𝐴) ↾ 𝑆) = (𝐹 ↾ 𝑆))
15	10, 14	eqtr3id 2791	. . . . . . 7 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → (𝐹 ↾ (𝑆 ∩ 𝐴)) = (𝐹 ↾ 𝑆))
16	15	feq1d 6720	. . . . . 6 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → ((𝐹 ↾ (𝑆 ∩ 𝐴)):(𝑆 ∩ 𝐴)⟶ℂ ↔ (𝐹 ↾ 𝑆):(𝑆 ∩ 𝐴)⟶ℂ))
17	7, 16	mpbid 232	. . . . 5 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → (𝐹 ↾ 𝑆):(𝑆 ∩ 𝐴)⟶ℂ)
18		inss1 4237	. . . . . 6 ⊢ (𝑆 ∩ 𝐴) ⊆ 𝑆
19	18	a1i 11	. . . . 5 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → (𝑆 ∩ 𝐴) ⊆ 𝑆)
20	3, 17, 19	dvbss 25936	. . . 4 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → dom (𝑆 D (𝐹 ↾ 𝑆)) ⊆ (𝑆 ∩ 𝐴))
21		dmres 6030	. . . . 5 ⊢ dom ((ℂ D 𝐹) ↾ 𝑆) = (𝑆 ∩ dom (ℂ D 𝐹))
22		simprr 773	. . . . . 6 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → dom (ℂ D 𝐹) = 𝐴)
23	22	ineq2d 4220	. . . . 5 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → (𝑆 ∩ dom (ℂ D 𝐹)) = (𝑆 ∩ 𝐴))
24	21, 23	eqtrid 2789	. . . 4 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → dom ((ℂ D 𝐹) ↾ 𝑆) = (𝑆 ∩ 𝐴))
25	20, 24	sseqtrrd 4021	. . 3 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → dom (𝑆 D (𝐹 ↾ 𝑆)) ⊆ dom ((ℂ D 𝐹) ↾ 𝑆))
26		relssres 6040	. . 3 ⊢ ((Rel (𝑆 D (𝐹 ↾ 𝑆)) ∧ dom (𝑆 D (𝐹 ↾ 𝑆)) ⊆ dom ((ℂ D 𝐹) ↾ 𝑆)) → ((𝑆 D (𝐹 ↾ 𝑆)) ↾ dom ((ℂ D 𝐹) ↾ 𝑆)) = (𝑆 D (𝐹 ↾ 𝑆)))
27	1, 25, 26	sylancr 587	. 2 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → ((𝑆 D (𝐹 ↾ 𝑆)) ↾ dom ((ℂ D 𝐹) ↾ 𝑆)) = (𝑆 D (𝐹 ↾ 𝑆)))
28		dvfg 25941	. . . . 5 ⊢ (𝑆 ∈ {ℝ, ℂ} → (𝑆 D (𝐹 ↾ 𝑆)):dom (𝑆 D (𝐹 ↾ 𝑆))⟶ℂ)
29	28	ad2antrr 726	. . . 4 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → (𝑆 D (𝐹 ↾ 𝑆)):dom (𝑆 D (𝐹 ↾ 𝑆))⟶ℂ)
30	29	ffund 6740	. . 3 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → Fun (𝑆 D (𝐹 ↾ 𝑆)))
31		ssidd 4007	. . . 4 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → ℂ ⊆ ℂ)
32		dvres3a.j	. . . . . 6 ⊢ 𝐽 = (TopOpen‘ℂ_fld)
33	32	cnfldtopon 24803	. . . . 5 ⊢ 𝐽 ∈ (TopOn‘ℂ)
34		simprl 771	. . . . 5 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → 𝐴 ∈ 𝐽)
35		toponss 22933	. . . . 5 ⊢ ((𝐽 ∈ (TopOn‘ℂ) ∧ 𝐴 ∈ 𝐽) → 𝐴 ⊆ ℂ)
36	33, 34, 35	sylancr 587	. . . 4 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → 𝐴 ⊆ ℂ)
37		dvres2 25947	. . . 4 ⊢ (((ℂ ⊆ ℂ ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ⊆ ℂ ∧ 𝑆 ⊆ ℂ)) → ((ℂ D 𝐹) ↾ 𝑆) ⊆ (𝑆 D (𝐹 ↾ 𝑆)))
38	31, 4, 36, 3, 37	syl22anc 839	. . 3 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → ((ℂ D 𝐹) ↾ 𝑆) ⊆ (𝑆 D (𝐹 ↾ 𝑆)))
39		funssres 6610	. . 3 ⊢ ((Fun (𝑆 D (𝐹 ↾ 𝑆)) ∧ ((ℂ D 𝐹) ↾ 𝑆) ⊆ (𝑆 D (𝐹 ↾ 𝑆))) → ((𝑆 D (𝐹 ↾ 𝑆)) ↾ dom ((ℂ D 𝐹) ↾ 𝑆)) = ((ℂ D 𝐹) ↾ 𝑆))
40	30, 38, 39	syl2anc 584	. 2 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → ((𝑆 D (𝐹 ↾ 𝑆)) ↾ dom ((ℂ D 𝐹) ↾ 𝑆)) = ((ℂ D 𝐹) ↾ 𝑆))
41	27, 40	eqtr3d 2779	1 ⊢ (((𝑆 ∈ {ℝ, ℂ} ∧ 𝐹:𝐴⟶ℂ) ∧ (𝐴 ∈ 𝐽 ∧ dom (ℂ D 𝐹) = 𝐴)) → (𝑆 D (𝐹 ↾ 𝑆)) = ((ℂ D 𝐹) ↾ 𝑆))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2108 ∩ cin 3950 ⊆ wss 3951 {cpr 4628 dom cdm 5685 ↾ cres 5687 Rel wrel 5690 Fun wfun 6555 Fn wfn 6556 ⟶wf 6557 ‘cfv 6561 (class class class)co 7431 ℂcc 11153 ℝcr 11154 TopOpenctopn 17466 ℂ_fldccnfld 21364 TopOnctopon 22916 D cdv 25898

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2708 ax-rep 5279 ax-sep 5296 ax-nul 5306 ax-pow 5365 ax-pr 5432 ax-un 7755 ax-cnex 11211 ax-resscn 11212 ax-1cn 11213 ax-icn 11214 ax-addcl 11215 ax-addrcl 11216 ax-mulcl 11217 ax-mulrcl 11218 ax-mulcom 11219 ax-addass 11220 ax-mulass 11221 ax-distr 11222 ax-i2m1 11223 ax-1ne0 11224 ax-1rid 11225 ax-rnegex 11226 ax-rrecex 11227 ax-cnre 11228 ax-pre-lttri 11229 ax-pre-lttrn 11230 ax-pre-ltadd 11231 ax-pre-mulgt0 11232 ax-pre-sup 11233

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2892 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3380 df-reu 3381 df-rab 3437 df-v 3482 df-sbc 3789 df-csb 3900 df-dif 3954 df-un 3956 df-in 3958 df-ss 3968 df-pss 3971 df-nul 4334 df-if 4526 df-pw 4602 df-sn 4627 df-pr 4629 df-tp 4631 df-op 4633 df-uni 4908 df-int 4947 df-iun 4993 df-iin 4994 df-br 5144 df-opab 5206 df-mpt 5226 df-tr 5260 df-id 5578 df-eprel 5584 df-po 5592 df-so 5593 df-fr 5637 df-we 5639 df-xp 5691 df-rel 5692 df-cnv 5693 df-co 5694 df-dm 5695 df-rn 5696 df-res 5697 df-ima 5698 df-pred 6321 df-ord 6387 df-on 6388 df-lim 6389 df-suc 6390 df-iota 6514 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-riota 7388 df-ov 7434 df-oprab 7435 df-mpo 7436 df-om 7888 df-1st 8014 df-2nd 8015 df-frecs 8306 df-wrecs 8337 df-recs 8411 df-rdg 8450 df-1o 8506 df-er 8745 df-map 8868 df-pm 8869 df-en 8986 df-dom 8987 df-sdom 8988 df-fin 8989 df-fi 9451 df-sup 9482 df-inf 9483 df-pnf 11297 df-mnf 11298 df-xr 11299 df-ltxr 11300 df-le 11301 df-sub 11494 df-neg 11495 df-div 11921 df-nn 12267 df-2 12329 df-3 12330 df-4 12331 df-5 12332 df-6 12333 df-7 12334 df-8 12335 df-9 12336 df-n0 12527 df-z 12614 df-dec 12734 df-uz 12879 df-q 12991 df-rp 13035 df-xneg 13154 df-xadd 13155 df-xmul 13156 df-icc 13394 df-fz 13548 df-seq 14043 df-exp 14103 df-cj 15138 df-re 15139 df-im 15140 df-sqrt 15274 df-abs 15275 df-struct 17184 df-slot 17219 df-ndx 17231 df-base 17248 df-plusg 17310 df-mulr 17311 df-starv 17312 df-tset 17316 df-ple 17317 df-ds 17319 df-unif 17320 df-rest 17467 df-topn 17468 df-topgen 17488 df-psmet 21356 df-xmet 21357 df-met 21358 df-bl 21359 df-mopn 21360 df-fbas 21361 df-fg 21362 df-cnfld 21365 df-top 22900 df-topon 22917 df-topsp 22939 df-bases 22953 df-cld 23027 df-ntr 23028 df-cls 23029 df-nei 23106 df-lp 23144 df-perf 23145 df-cnp 23236 df-haus 23323 df-fil 23854 df-fm 23946 df-flim 23947 df-flf 23948 df-xms 24330 df-ms 24331 df-limc 25901 df-dv 25902

This theorem is referenced by: dvnres 25967 dvmptres3 25994

W3C validator