Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > dvdivf | Structured version Visualization version GIF version |
Description: The quotient rule for everywhere-differentiable functions. (Contributed by Glauco Siliprandi, 11-Dec-2019.) |
Ref | Expression |
---|---|
dvdivf.s | ⊢ (𝜑 → 𝑆 ∈ {ℝ, ℂ}) |
dvdivf.f | ⊢ (𝜑 → 𝐹:𝑋⟶ℂ) |
dvdivf.g | ⊢ (𝜑 → 𝐺:𝑋⟶(ℂ ∖ {0})) |
dvdivf.fdv | ⊢ (𝜑 → dom (𝑆 D 𝐹) = 𝑋) |
dvdivf.gdv | ⊢ (𝜑 → dom (𝑆 D 𝐺) = 𝑋) |
Ref | Expression |
---|---|
dvdivf | ⊢ (𝜑 → (𝑆 D (𝐹 ∘f / 𝐺)) = ((((𝑆 D 𝐹) ∘f · 𝐺) ∘f − ((𝑆 D 𝐺) ∘f · 𝐹)) ∘f / (𝐺 ∘f · 𝐺))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dvdivf.s | . . 3 ⊢ (𝜑 → 𝑆 ∈ {ℝ, ℂ}) | |
2 | dvdivf.f | . . . 4 ⊢ (𝜑 → 𝐹:𝑋⟶ℂ) | |
3 | 2 | ffvelrnda 6943 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → (𝐹‘𝑥) ∈ ℂ) |
4 | dvfg 24975 | . . . . . 6 ⊢ (𝑆 ∈ {ℝ, ℂ} → (𝑆 D 𝐹):dom (𝑆 D 𝐹)⟶ℂ) | |
5 | 1, 4 | syl 17 | . . . . 5 ⊢ (𝜑 → (𝑆 D 𝐹):dom (𝑆 D 𝐹)⟶ℂ) |
6 | dvdivf.fdv | . . . . . 6 ⊢ (𝜑 → dom (𝑆 D 𝐹) = 𝑋) | |
7 | 6 | feq2d 6570 | . . . . 5 ⊢ (𝜑 → ((𝑆 D 𝐹):dom (𝑆 D 𝐹)⟶ℂ ↔ (𝑆 D 𝐹):𝑋⟶ℂ)) |
8 | 5, 7 | mpbid 231 | . . . 4 ⊢ (𝜑 → (𝑆 D 𝐹):𝑋⟶ℂ) |
9 | 8 | ffvelrnda 6943 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → ((𝑆 D 𝐹)‘𝑥) ∈ ℂ) |
10 | 2 | feqmptd 6819 | . . . . 5 ⊢ (𝜑 → 𝐹 = (𝑥 ∈ 𝑋 ↦ (𝐹‘𝑥))) |
11 | 10 | oveq2d 7271 | . . . 4 ⊢ (𝜑 → (𝑆 D 𝐹) = (𝑆 D (𝑥 ∈ 𝑋 ↦ (𝐹‘𝑥)))) |
12 | 8 | feqmptd 6819 | . . . 4 ⊢ (𝜑 → (𝑆 D 𝐹) = (𝑥 ∈ 𝑋 ↦ ((𝑆 D 𝐹)‘𝑥))) |
13 | 11, 12 | eqtr3d 2780 | . . 3 ⊢ (𝜑 → (𝑆 D (𝑥 ∈ 𝑋 ↦ (𝐹‘𝑥))) = (𝑥 ∈ 𝑋 ↦ ((𝑆 D 𝐹)‘𝑥))) |
14 | dvdivf.g | . . . 4 ⊢ (𝜑 → 𝐺:𝑋⟶(ℂ ∖ {0})) | |
15 | 14 | ffvelrnda 6943 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → (𝐺‘𝑥) ∈ (ℂ ∖ {0})) |
16 | dvfg 24975 | . . . . . 6 ⊢ (𝑆 ∈ {ℝ, ℂ} → (𝑆 D 𝐺):dom (𝑆 D 𝐺)⟶ℂ) | |
17 | 1, 16 | syl 17 | . . . . 5 ⊢ (𝜑 → (𝑆 D 𝐺):dom (𝑆 D 𝐺)⟶ℂ) |
18 | dvdivf.gdv | . . . . . 6 ⊢ (𝜑 → dom (𝑆 D 𝐺) = 𝑋) | |
19 | 18 | feq2d 6570 | . . . . 5 ⊢ (𝜑 → ((𝑆 D 𝐺):dom (𝑆 D 𝐺)⟶ℂ ↔ (𝑆 D 𝐺):𝑋⟶ℂ)) |
20 | 17, 19 | mpbid 231 | . . . 4 ⊢ (𝜑 → (𝑆 D 𝐺):𝑋⟶ℂ) |
21 | 20 | ffvelrnda 6943 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → ((𝑆 D 𝐺)‘𝑥) ∈ ℂ) |
22 | 14 | feqmptd 6819 | . . . . 5 ⊢ (𝜑 → 𝐺 = (𝑥 ∈ 𝑋 ↦ (𝐺‘𝑥))) |
23 | 22 | oveq2d 7271 | . . . 4 ⊢ (𝜑 → (𝑆 D 𝐺) = (𝑆 D (𝑥 ∈ 𝑋 ↦ (𝐺‘𝑥)))) |
24 | 20 | feqmptd 6819 | . . . 4 ⊢ (𝜑 → (𝑆 D 𝐺) = (𝑥 ∈ 𝑋 ↦ ((𝑆 D 𝐺)‘𝑥))) |
25 | 23, 24 | eqtr3d 2780 | . . 3 ⊢ (𝜑 → (𝑆 D (𝑥 ∈ 𝑋 ↦ (𝐺‘𝑥))) = (𝑥 ∈ 𝑋 ↦ ((𝑆 D 𝐺)‘𝑥))) |
26 | 1, 3, 9, 13, 15, 21, 25 | dvmptdiv 25043 | . 2 ⊢ (𝜑 → (𝑆 D (𝑥 ∈ 𝑋 ↦ ((𝐹‘𝑥) / (𝐺‘𝑥)))) = (𝑥 ∈ 𝑋 ↦ (((((𝑆 D 𝐹)‘𝑥) · (𝐺‘𝑥)) − (((𝑆 D 𝐺)‘𝑥) · (𝐹‘𝑥))) / ((𝐺‘𝑥)↑2)))) |
27 | ovex 7288 | . . . . . 6 ⊢ (𝑆 D 𝐹) ∈ V | |
28 | 27 | dmex 7732 | . . . . 5 ⊢ dom (𝑆 D 𝐹) ∈ V |
29 | 6, 28 | eqeltrrdi 2848 | . . . 4 ⊢ (𝜑 → 𝑋 ∈ V) |
30 | 29, 3, 15, 10, 22 | offval2 7531 | . . 3 ⊢ (𝜑 → (𝐹 ∘f / 𝐺) = (𝑥 ∈ 𝑋 ↦ ((𝐹‘𝑥) / (𝐺‘𝑥)))) |
31 | 30 | oveq2d 7271 | . 2 ⊢ (𝜑 → (𝑆 D (𝐹 ∘f / 𝐺)) = (𝑆 D (𝑥 ∈ 𝑋 ↦ ((𝐹‘𝑥) / (𝐺‘𝑥))))) |
32 | ovexd 7290 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → ((((𝑆 D 𝐹)‘𝑥) · (𝐺‘𝑥)) − (((𝑆 D 𝐺)‘𝑥) · (𝐹‘𝑥))) ∈ V) | |
33 | 15 | eldifad 3895 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → (𝐺‘𝑥) ∈ ℂ) |
34 | 33 | sqcld 13790 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → ((𝐺‘𝑥)↑2) ∈ ℂ) |
35 | 9, 33 | mulcld 10926 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → (((𝑆 D 𝐹)‘𝑥) · (𝐺‘𝑥)) ∈ ℂ) |
36 | 21, 3 | mulcld 10926 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → (((𝑆 D 𝐺)‘𝑥) · (𝐹‘𝑥)) ∈ ℂ) |
37 | 29, 9, 33, 12, 22 | offval2 7531 | . . . 4 ⊢ (𝜑 → ((𝑆 D 𝐹) ∘f · 𝐺) = (𝑥 ∈ 𝑋 ↦ (((𝑆 D 𝐹)‘𝑥) · (𝐺‘𝑥)))) |
38 | 29, 21, 3, 24, 10 | offval2 7531 | . . . 4 ⊢ (𝜑 → ((𝑆 D 𝐺) ∘f · 𝐹) = (𝑥 ∈ 𝑋 ↦ (((𝑆 D 𝐺)‘𝑥) · (𝐹‘𝑥)))) |
39 | 29, 35, 36, 37, 38 | offval2 7531 | . . 3 ⊢ (𝜑 → (((𝑆 D 𝐹) ∘f · 𝐺) ∘f − ((𝑆 D 𝐺) ∘f · 𝐹)) = (𝑥 ∈ 𝑋 ↦ ((((𝑆 D 𝐹)‘𝑥) · (𝐺‘𝑥)) − (((𝑆 D 𝐺)‘𝑥) · (𝐹‘𝑥))))) |
40 | 29, 15, 15, 22, 22 | offval2 7531 | . . . 4 ⊢ (𝜑 → (𝐺 ∘f · 𝐺) = (𝑥 ∈ 𝑋 ↦ ((𝐺‘𝑥) · (𝐺‘𝑥)))) |
41 | 33 | sqvald 13789 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋) → ((𝐺‘𝑥)↑2) = ((𝐺‘𝑥) · (𝐺‘𝑥))) |
42 | 41 | mpteq2dva 5170 | . . . 4 ⊢ (𝜑 → (𝑥 ∈ 𝑋 ↦ ((𝐺‘𝑥)↑2)) = (𝑥 ∈ 𝑋 ↦ ((𝐺‘𝑥) · (𝐺‘𝑥)))) |
43 | 40, 42 | eqtr4d 2781 | . . 3 ⊢ (𝜑 → (𝐺 ∘f · 𝐺) = (𝑥 ∈ 𝑋 ↦ ((𝐺‘𝑥)↑2))) |
44 | 29, 32, 34, 39, 43 | offval2 7531 | . 2 ⊢ (𝜑 → ((((𝑆 D 𝐹) ∘f · 𝐺) ∘f − ((𝑆 D 𝐺) ∘f · 𝐹)) ∘f / (𝐺 ∘f · 𝐺)) = (𝑥 ∈ 𝑋 ↦ (((((𝑆 D 𝐹)‘𝑥) · (𝐺‘𝑥)) − (((𝑆 D 𝐺)‘𝑥) · (𝐹‘𝑥))) / ((𝐺‘𝑥)↑2)))) |
45 | 26, 31, 44 | 3eqtr4d 2788 | 1 ⊢ (𝜑 → (𝑆 D (𝐹 ∘f / 𝐺)) = ((((𝑆 D 𝐹) ∘f · 𝐺) ∘f − ((𝑆 D 𝐺) ∘f · 𝐹)) ∘f / (𝐺 ∘f · 𝐺))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 ∈ wcel 2108 Vcvv 3422 ∖ cdif 3880 {csn 4558 {cpr 4560 ↦ cmpt 5153 dom cdm 5580 ⟶wf 6414 ‘cfv 6418 (class class class)co 7255 ∘f cof 7509 ℂcc 10800 ℝcr 10801 0cc0 10802 · cmul 10807 − cmin 11135 / cdiv 11562 2c2 11958 ↑cexp 13710 D cdv 24932 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 ax-addf 10881 ax-mulf 10882 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-iin 4924 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-se 5536 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-isom 6427 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-of 7511 df-om 7688 df-1st 7804 df-2nd 7805 df-supp 7949 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-2o 8268 df-er 8456 df-map 8575 df-pm 8576 df-ixp 8644 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-fsupp 9059 df-fi 9100 df-sup 9131 df-inf 9132 df-oi 9199 df-card 9628 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-3 11967 df-4 11968 df-5 11969 df-6 11970 df-7 11971 df-8 11972 df-9 11973 df-n0 12164 df-z 12250 df-dec 12367 df-uz 12512 df-q 12618 df-rp 12660 df-xneg 12777 df-xadd 12778 df-xmul 12779 df-icc 13015 df-fz 13169 df-fzo 13312 df-seq 13650 df-exp 13711 df-hash 13973 df-cj 14738 df-re 14739 df-im 14740 df-sqrt 14874 df-abs 14875 df-struct 16776 df-sets 16793 df-slot 16811 df-ndx 16823 df-base 16841 df-ress 16868 df-plusg 16901 df-mulr 16902 df-starv 16903 df-sca 16904 df-vsca 16905 df-ip 16906 df-tset 16907 df-ple 16908 df-ds 16910 df-unif 16911 df-hom 16912 df-cco 16913 df-rest 17050 df-topn 17051 df-0g 17069 df-gsum 17070 df-topgen 17071 df-pt 17072 df-prds 17075 df-xrs 17130 df-qtop 17135 df-imas 17136 df-xps 17138 df-mre 17212 df-mrc 17213 df-acs 17215 df-mgm 18241 df-sgrp 18290 df-mnd 18301 df-submnd 18346 df-mulg 18616 df-cntz 18838 df-cmn 19303 df-psmet 20502 df-xmet 20503 df-met 20504 df-bl 20505 df-mopn 20506 df-fbas 20507 df-fg 20508 df-cnfld 20511 df-top 21951 df-topon 21968 df-topsp 21990 df-bases 22004 df-cld 22078 df-ntr 22079 df-cls 22080 df-nei 22157 df-lp 22195 df-perf 22196 df-cn 22286 df-cnp 22287 df-t1 22373 df-haus 22374 df-tx 22621 df-hmeo 22814 df-fil 22905 df-fm 22997 df-flim 22998 df-flf 22999 df-xms 23381 df-ms 23382 df-tms 23383 df-cncf 23947 df-limc 24935 df-dv 24936 |
This theorem is referenced by: dvdivcncf 43358 |
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