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Mirrors > Home > MPE Home > Th. List > Mathboxes > fdivmptf | Structured version Visualization version GIF version |
Description: The quotient of two functions into the complex numbers is a function into the complex numbers. (Contributed by AV, 16-May-2020.) |
Ref | Expression |
---|---|
fdivmptf | ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → (𝐹 /f 𝐺):(𝐺 supp 0)⟶ℂ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpl1 1193 | . . . . 5 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) ∧ 𝑥 ∈ (𝐺 supp 0)) → 𝐹:𝐴⟶ℂ) | |
2 | suppssdm 7897 | . . . . . . . 8 ⊢ (𝐺 supp 0) ⊆ dom 𝐺 | |
3 | fdm 6532 | . . . . . . . 8 ⊢ (𝐺:𝐴⟶ℂ → dom 𝐺 = 𝐴) | |
4 | 2, 3 | sseqtrid 3939 | . . . . . . 7 ⊢ (𝐺:𝐴⟶ℂ → (𝐺 supp 0) ⊆ 𝐴) |
5 | 4 | 3ad2ant2 1136 | . . . . . 6 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → (𝐺 supp 0) ⊆ 𝐴) |
6 | 5 | sselda 3887 | . . . . 5 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) ∧ 𝑥 ∈ (𝐺 supp 0)) → 𝑥 ∈ 𝐴) |
7 | 1, 6 | ffvelrnd 6883 | . . . 4 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) ∧ 𝑥 ∈ (𝐺 supp 0)) → (𝐹‘𝑥) ∈ ℂ) |
8 | simpl2 1194 | . . . . 5 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) ∧ 𝑥 ∈ (𝐺 supp 0)) → 𝐺:𝐴⟶ℂ) | |
9 | 8, 6 | ffvelrnd 6883 | . . . 4 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) ∧ 𝑥 ∈ (𝐺 supp 0)) → (𝐺‘𝑥) ∈ ℂ) |
10 | ffn 6523 | . . . . . . 7 ⊢ (𝐺:𝐴⟶ℂ → 𝐺 Fn 𝐴) | |
11 | 10 | 3ad2ant2 1136 | . . . . . 6 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → 𝐺 Fn 𝐴) |
12 | simp3 1140 | . . . . . 6 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → 𝐴 ∈ 𝑉) | |
13 | 0cnd 10791 | . . . . . 6 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → 0 ∈ ℂ) | |
14 | elsuppfn 7891 | . . . . . 6 ⊢ ((𝐺 Fn 𝐴 ∧ 𝐴 ∈ 𝑉 ∧ 0 ∈ ℂ) → (𝑥 ∈ (𝐺 supp 0) ↔ (𝑥 ∈ 𝐴 ∧ (𝐺‘𝑥) ≠ 0))) | |
15 | 11, 12, 13, 14 | syl3anc 1373 | . . . . 5 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → (𝑥 ∈ (𝐺 supp 0) ↔ (𝑥 ∈ 𝐴 ∧ (𝐺‘𝑥) ≠ 0))) |
16 | 15 | simplbda 503 | . . . 4 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) ∧ 𝑥 ∈ (𝐺 supp 0)) → (𝐺‘𝑥) ≠ 0) |
17 | 7, 9, 16 | divcld 11573 | . . 3 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) ∧ 𝑥 ∈ (𝐺 supp 0)) → ((𝐹‘𝑥) / (𝐺‘𝑥)) ∈ ℂ) |
18 | 17 | fmpttd 6910 | . 2 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → (𝑥 ∈ (𝐺 supp 0) ↦ ((𝐹‘𝑥) / (𝐺‘𝑥))):(𝐺 supp 0)⟶ℂ) |
19 | fdivmpt 45502 | . . 3 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → (𝐹 /f 𝐺) = (𝑥 ∈ (𝐺 supp 0) ↦ ((𝐹‘𝑥) / (𝐺‘𝑥)))) | |
20 | 19 | feq1d 6508 | . 2 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → ((𝐹 /f 𝐺):(𝐺 supp 0)⟶ℂ ↔ (𝑥 ∈ (𝐺 supp 0) ↦ ((𝐹‘𝑥) / (𝐺‘𝑥))):(𝐺 supp 0)⟶ℂ)) |
21 | 18, 20 | mpbird 260 | 1 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → (𝐹 /f 𝐺):(𝐺 supp 0)⟶ℂ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 ∧ w3a 1089 ∈ wcel 2112 ≠ wne 2932 ⊆ wss 3853 ↦ cmpt 5120 dom cdm 5536 Fn wfn 6353 ⟶wf 6354 ‘cfv 6358 (class class class)co 7191 supp csupp 7881 ℂcc 10692 0cc0 10694 / cdiv 11454 /f cfdiv 45499 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2708 ax-rep 5164 ax-sep 5177 ax-nul 5184 ax-pow 5243 ax-pr 5307 ax-un 7501 ax-resscn 10751 ax-1cn 10752 ax-icn 10753 ax-addcl 10754 ax-addrcl 10755 ax-mulcl 10756 ax-mulrcl 10757 ax-mulcom 10758 ax-addass 10759 ax-mulass 10760 ax-distr 10761 ax-i2m1 10762 ax-1ne0 10763 ax-1rid 10764 ax-rnegex 10765 ax-rrecex 10766 ax-cnre 10767 ax-pre-lttri 10768 ax-pre-lttrn 10769 ax-pre-ltadd 10770 ax-pre-mulgt0 10771 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2728 df-clel 2809 df-nfc 2879 df-ne 2933 df-nel 3037 df-ral 3056 df-rex 3057 df-reu 3058 df-rmo 3059 df-rab 3060 df-v 3400 df-sbc 3684 df-csb 3799 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-nul 4224 df-if 4426 df-pw 4501 df-sn 4528 df-pr 4530 df-op 4534 df-uni 4806 df-iun 4892 df-br 5040 df-opab 5102 df-mpt 5121 df-id 5440 df-po 5453 df-so 5454 df-xp 5542 df-rel 5543 df-cnv 5544 df-co 5545 df-dm 5546 df-rn 5547 df-res 5548 df-ima 5549 df-iota 6316 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-fv 6366 df-riota 7148 df-ov 7194 df-oprab 7195 df-mpo 7196 df-of 7447 df-supp 7882 df-er 8369 df-en 8605 df-dom 8606 df-sdom 8607 df-pnf 10834 df-mnf 10835 df-xr 10836 df-ltxr 10837 df-le 10838 df-sub 11029 df-neg 11030 df-div 11455 df-fdiv 45500 |
This theorem is referenced by: fdivpm 45505 |
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