eldvap - Intuitionistic Logic Explorer

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Theorem eldvap 15405

Description: The differentiable predicate. A function 𝐹 is differentiable at 𝐵 with derivative 𝐶 iff 𝐹 is defined in a neighborhood of 𝐵 and the difference quotient has limit 𝐶 at 𝐵. (Contributed by Mario Carneiro, 7-Aug-2014.) (Revised by Jim Kingdon, 27-Jun-2023.)

**Hypotheses**
Ref	Expression
dvval.t	⊢ 𝑇 = (𝐾 ↾_t 𝑆)
dvval.k	⊢ 𝐾 = (MetOpen‘(abs ∘ − ))
eldvap.g	⊢ 𝐺 = (𝑧 ∈ {𝑤 ∈ 𝐴 ∣ 𝑤 # 𝐵} ↦ (((𝐹‘𝑧) − (𝐹‘𝐵)) / (𝑧 − 𝐵)))
eldv.s	⊢ (𝜑 → 𝑆 ⊆ ℂ)
eldv.f	⊢ (𝜑 → 𝐹:𝐴⟶ℂ)
eldv.a	⊢ (𝜑 → 𝐴 ⊆ 𝑆)

**Assertion**
Ref	Expression
eldvap	⊢ (𝜑 → (𝐵(𝑆 D 𝐹)𝐶 ↔ (𝐵 ∈ ((int‘𝑇)‘𝐴) ∧ 𝐶 ∈ (𝐺 lim_ℂ 𝐵))))

Distinct variable groups: 𝑤,𝐴,𝑧 𝑤,𝐹,𝑧 𝑤,𝑆,𝑧 𝑧,𝐵,𝑤 Allowed substitution hints: 𝜑(𝑧,𝑤) 𝐶(𝑧,𝑤) 𝑇(𝑧,𝑤) 𝐺(𝑧,𝑤) 𝐾(𝑧,𝑤)

Proof of Theorem eldvap Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		eldv.s	. . . . 5 ⊢ (𝜑 → 𝑆 ⊆ ℂ)
2		eldv.f	. . . . 5 ⊢ (𝜑 → 𝐹:𝐴⟶ℂ)
3		eldv.a	. . . . 5 ⊢ (𝜑 → 𝐴 ⊆ 𝑆)
4		dvval.t	. . . . . 6 ⊢ 𝑇 = (𝐾 ↾_t 𝑆)
5		dvval.k	. . . . . 6 ⊢ 𝐾 = (MetOpen‘(abs ∘ − ))
6	4, 5	dvfvalap 15404	. . . . 5 ⊢ ((𝑆 ⊆ ℂ ∧ 𝐹:𝐴⟶ℂ ∧ 𝐴 ⊆ 𝑆) → ((𝑆 D 𝐹) = ∪ 𝑥 ∈ ((int‘𝑇)‘𝐴)({𝑥} × ((𝑧 ∈ {𝑤 ∈ 𝐴 ∣ 𝑤 # 𝑥} ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥))) lim_ℂ 𝑥)) ∧ (𝑆 D 𝐹) ⊆ (((int‘𝑇)‘𝐴) × ℂ)))
7	1, 2, 3, 6	syl3anc 1273	. . . 4 ⊢ (𝜑 → ((𝑆 D 𝐹) = ∪ 𝑥 ∈ ((int‘𝑇)‘𝐴)({𝑥} × ((𝑧 ∈ {𝑤 ∈ 𝐴 ∣ 𝑤 # 𝑥} ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥))) lim_ℂ 𝑥)) ∧ (𝑆 D 𝐹) ⊆ (((int‘𝑇)‘𝐴) × ℂ)))
8	7	simpld 112	. . 3 ⊢ (𝜑 → (𝑆 D 𝐹) = ∪ 𝑥 ∈ ((int‘𝑇)‘𝐴)({𝑥} × ((𝑧 ∈ {𝑤 ∈ 𝐴 ∣ 𝑤 # 𝑥} ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥))) lim_ℂ 𝑥)))
9	8	eleq2d 2301	. 2 ⊢ (𝜑 → (⟨𝐵, 𝐶⟩ ∈ (𝑆 D 𝐹) ↔ ⟨𝐵, 𝐶⟩ ∈ ∪ 𝑥 ∈ ((int‘𝑇)‘𝐴)({𝑥} × ((𝑧 ∈ {𝑤 ∈ 𝐴 ∣ 𝑤 # 𝑥} ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥))) lim_ℂ 𝑥))))
10		df-br 4089	. . 3 ⊢ (𝐵(𝑆 D 𝐹)𝐶 ↔ ⟨𝐵, 𝐶⟩ ∈ (𝑆 D 𝐹))
11	10	bicomi 132	. 2 ⊢ (⟨𝐵, 𝐶⟩ ∈ (𝑆 D 𝐹) ↔ 𝐵(𝑆 D 𝐹)𝐶)
12		breq2 4092	. . . . . . 7 ⊢ (𝑥 = 𝐵 → (𝑤 # 𝑥 ↔ 𝑤 # 𝐵))
13	12	rabbidv 2791	. . . . . 6 ⊢ (𝑥 = 𝐵 → {𝑤 ∈ 𝐴 ∣ 𝑤 # 𝑥} = {𝑤 ∈ 𝐴 ∣ 𝑤 # 𝐵})
14		fveq2 5639	. . . . . . . 8 ⊢ (𝑥 = 𝐵 → (𝐹‘𝑥) = (𝐹‘𝐵))
15	14	oveq2d 6033	. . . . . . 7 ⊢ (𝑥 = 𝐵 → ((𝐹‘𝑧) − (𝐹‘𝑥)) = ((𝐹‘𝑧) − (𝐹‘𝐵)))
16		oveq2 6025	. . . . . . 7 ⊢ (𝑥 = 𝐵 → (𝑧 − 𝑥) = (𝑧 − 𝐵))
17	15, 16	oveq12d 6035	. . . . . 6 ⊢ (𝑥 = 𝐵 → (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥)) = (((𝐹‘𝑧) − (𝐹‘𝐵)) / (𝑧 − 𝐵)))
18	13, 17	mpteq12dv 4171	. . . . 5 ⊢ (𝑥 = 𝐵 → (𝑧 ∈ {𝑤 ∈ 𝐴 ∣ 𝑤 # 𝑥} ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥))) = (𝑧 ∈ {𝑤 ∈ 𝐴 ∣ 𝑤 # 𝐵} ↦ (((𝐹‘𝑧) − (𝐹‘𝐵)) / (𝑧 − 𝐵))))
19		eldvap.g	. . . . 5 ⊢ 𝐺 = (𝑧 ∈ {𝑤 ∈ 𝐴 ∣ 𝑤 # 𝐵} ↦ (((𝐹‘𝑧) − (𝐹‘𝐵)) / (𝑧 − 𝐵)))
20	18, 19	eqtr4di 2282	. . . 4 ⊢ (𝑥 = 𝐵 → (𝑧 ∈ {𝑤 ∈ 𝐴 ∣ 𝑤 # 𝑥} ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥))) = 𝐺)
21		id 19	. . . 4 ⊢ (𝑥 = 𝐵 → 𝑥 = 𝐵)
22	20, 21	oveq12d 6035	. . 3 ⊢ (𝑥 = 𝐵 → ((𝑧 ∈ {𝑤 ∈ 𝐴 ∣ 𝑤 # 𝑥} ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥))) lim_ℂ 𝑥) = (𝐺 lim_ℂ 𝐵))
23	22	opeliunxp2 4870	. 2 ⊢ (⟨𝐵, 𝐶⟩ ∈ ∪ 𝑥 ∈ ((int‘𝑇)‘𝐴)({𝑥} × ((𝑧 ∈ {𝑤 ∈ 𝐴 ∣ 𝑤 # 𝑥} ↦ (((𝐹‘𝑧) − (𝐹‘𝑥)) / (𝑧 − 𝑥))) lim_ℂ 𝑥)) ↔ (𝐵 ∈ ((int‘𝑇)‘𝐴) ∧ 𝐶 ∈ (𝐺 lim_ℂ 𝐵)))
24	9, 11, 23	3bitr3g 222	1 ⊢ (𝜑 → (𝐵(𝑆 D 𝐹)𝐶 ↔ (𝐵 ∈ ((int‘𝑇)‘𝐴) ∧ 𝐶 ∈ (𝐺 lim_ℂ 𝐵))))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1397 ∈ wcel 2202 {crab 2514 ⊆ wss 3200 {csn 3669 ⟨cop 3672 ∪ ciun 3970 class class class wbr 4088 ↦ cmpt 4150 × cxp 4723 ∘ ccom 4729 ⟶wf 5322 ‘cfv 5326 (class class class)co 6017 ℂcc 8029 − cmin 8349 # cap 8760 / cdiv 8851 abscabs 11557 ↾_t crest 13321 MetOpencmopn 14554 intcnt 14816 lim_ℂ climc 15377 D cdv 15378

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-coll 4204 ax-sep 4207 ax-nul 4215 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 ax-iinf 4686 ax-cnex 8122 ax-resscn 8123 ax-1cn 8124 ax-1re 8125 ax-icn 8126 ax-addcl 8127 ax-addrcl 8128 ax-mulcl 8129 ax-mulrcl 8130 ax-addcom 8131 ax-mulcom 8132 ax-addass 8133 ax-mulass 8134 ax-distr 8135 ax-i2m1 8136 ax-0lt1 8137 ax-1rid 8138 ax-0id 8139 ax-rnegex 8140 ax-precex 8141 ax-cnre 8142 ax-pre-ltirr 8143 ax-pre-ltwlin 8144 ax-pre-lttrn 8145 ax-pre-apti 8146 ax-pre-ltadd 8147 ax-pre-mulgt0 8148 ax-pre-mulext 8149 ax-arch 8150 ax-caucvg 8151

This theorem depends on definitions: df-bi 117 df-stab 838 df-dc 842 df-3or 1005 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-nel 2498 df-ral 2515 df-rex 2516 df-reu 2517 df-rmo 2518 df-rab 2519 df-v 2804 df-sbc 3032 df-csb 3128 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-if 3606 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-iun 3972 df-br 4089 df-opab 4151 df-mpt 4152 df-tr 4188 df-id 4390 df-po 4393 df-iso 4394 df-iord 4463 df-on 4465 df-ilim 4466 df-suc 4468 df-iom 4689 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-iota 5286 df-fun 5328 df-fn 5329 df-f 5330 df-f1 5331 df-fo 5332 df-f1o 5333 df-fv 5334 df-isom 5335 df-riota 5970 df-ov 6020 df-oprab 6021 df-mpo 6022 df-1st 6302 df-2nd 6303 df-recs 6470 df-frec 6556 df-map 6818 df-pm 6819 df-sup 7182 df-inf 7183 df-pnf 8215 df-mnf 8216 df-xr 8217 df-ltxr 8218 df-le 8219 df-sub 8351 df-neg 8352 df-reap 8754 df-ap 8761 df-div 8852 df-inn 9143 df-2 9201 df-3 9202 df-4 9203 df-n0 9402 df-z 9479 df-uz 9755 df-q 9853 df-rp 9888 df-xneg 10006 df-xadd 10007 df-seqfrec 10709 df-exp 10800 df-cj 11402 df-re 11403 df-im 11404 df-rsqrt 11558 df-abs 11559 df-rest 13323 df-topgen 13342 df-psmet 14556 df-xmet 14557 df-met 14558 df-bl 14559 df-mopn 14560 df-top 14721 df-topon 14734 df-bases 14766 df-ntr 14819 df-limced 15379 df-dvap 15380

This theorem is referenced by: dvcl 15406 dvfgg 15411 dvidlemap 15414 dvidrelem 15415 dvidsslem 15416 dvcnp2cntop 15422 dvaddxxbr 15424 dvmulxxbr 15425 dvcoapbr 15430 dvcjbr 15431 dvrecap 15436 dveflem 15449

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