| Mathbox for Alexander van der Vekens |
< Previous
Next >
Nearby theorems |
||
| 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 1210 | . . . . 5 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) ∧ 𝑥 ∈ (𝐺 supp 0)) → 𝐹:𝐴⟶ℂ) | |
| 2 | suppssdm 8169 | . . . . . . . 8 ⊢ (𝐺 supp 0) ⊆ dom 𝐺 | |
| 3 | fdm 6715 | . . . . . . . 8 ⊢ (𝐺:𝐴⟶ℂ → dom 𝐺 = 𝐴) | |
| 4 | 2, 3 | sseqtrid 3979 | . . . . . . 7 ⊢ (𝐺:𝐴⟶ℂ → (𝐺 supp 0) ⊆ 𝐴) |
| 5 | 4 | 3ad2ant2 1152 | . . . . . 6 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → (𝐺 supp 0) ⊆ 𝐴) |
| 6 | 5 | sselda 3937 | . . . . 5 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) ∧ 𝑥 ∈ (𝐺 supp 0)) → 𝑥 ∈ 𝐴) |
| 7 | 1, 6 | ffvelcdmd 7080 | . . . 4 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) ∧ 𝑥 ∈ (𝐺 supp 0)) → (𝐹‘𝑥) ∈ ℂ) |
| 8 | simpl2 1211 | . . . . 5 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) ∧ 𝑥 ∈ (𝐺 supp 0)) → 𝐺:𝐴⟶ℂ) | |
| 9 | 8, 6 | ffvelcdmd 7080 | . . . 4 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) ∧ 𝑥 ∈ (𝐺 supp 0)) → (𝐺‘𝑥) ∈ ℂ) |
| 10 | ffn 6705 | . . . . . . 7 ⊢ (𝐺:𝐴⟶ℂ → 𝐺 Fn 𝐴) | |
| 11 | 10 | 3ad2ant2 1152 | . . . . . 6 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → 𝐺 Fn 𝐴) |
| 12 | simp3 1156 | . . . . . 6 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → 𝐴 ∈ 𝑉) | |
| 13 | 0cnd 11203 | . . . . . 6 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → 0 ∈ ℂ) | |
| 14 | elsuppfn 8162 | . . . . . 6 ⊢ ((𝐺 Fn 𝐴 ∧ 𝐴 ∈ 𝑉 ∧ 0 ∈ ℂ) → (𝑥 ∈ (𝐺 supp 0) ↔ (𝑥 ∈ 𝐴 ∧ (𝐺‘𝑥) ≠ 0))) | |
| 15 | 11, 12, 13, 14 | syl3anc 1398 | . . . . 5 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → (𝑥 ∈ (𝐺 supp 0) ↔ (𝑥 ∈ 𝐴 ∧ (𝐺‘𝑥) ≠ 0))) |
| 16 | 15 | simplbda 504 | . . . 4 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) ∧ 𝑥 ∈ (𝐺 supp 0)) → (𝐺‘𝑥) ≠ 0) |
| 17 | 7, 9, 16 | divcld 11995 | . . 3 ⊢ (((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) ∧ 𝑥 ∈ (𝐺 supp 0)) → ((𝐹‘𝑥) / (𝐺‘𝑥)) ∈ ℂ) |
| 18 | 17 | fmpttd 7110 | . 2 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → (𝑥 ∈ (𝐺 supp 0) ↦ ((𝐹‘𝑥) / (𝐺‘𝑥))):(𝐺 supp 0)⟶ℂ) |
| 19 | fdivmpt 49348 | . . 3 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → (𝐹 /f 𝐺) = (𝑥 ∈ (𝐺 supp 0) ↦ ((𝐹‘𝑥) / (𝐺‘𝑥)))) | |
| 20 | 19 | feq1d 6687 | . 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 |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 400 ∧ w3a 1103 ∈ wcel 2143 ≠ wne 2958 ⊆ wss 3905 ↦ cmpt 5192 dom cdm 5661 Fn wfn 6531 ⟶wf 6532 ‘cfv 6536 (class class class)co 7410 supp csupp 8152 ℂcc 11102 0cc0 11104 / cdiv 11875 /f cfdiv 49345 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5238 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-resscn 11161 ax-1cn 11162 ax-icn 11163 ax-addcl 11164 ax-addrcl 11165 ax-mulcl 11166 ax-mulrcl 11167 ax-mulcom 11168 ax-addass 11169 ax-mulass 11170 ax-distr 11171 ax-i2m1 11172 ax-1ne0 11173 ax-1rid 11174 ax-rnegex 11175 ax-rrecex 11176 ax-cnre 11177 ax-pre-lttri 11178 ax-pre-lttrn 11179 ax-pre-ltadd 11180 ax-pre-mulgt0 11181 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-id 5556 df-po 5569 df-so 5570 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-of 7674 df-supp 8153 df-er 8690 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11249 df-mnf 11250 df-xr 11251 df-ltxr 11252 df-le 11253 df-sub 11447 df-neg 11448 df-div 11876 df-fdiv 49346 |
| This theorem is used by: fdivpm 49351 |
| Copyright terms: Public domain | W3C validator |