Mathbox for Alexander van der Vekens |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > refdivmptfv | Structured version Visualization version GIF version |
Description: The function value of a quotient of two functions into the real numbers. (Contributed by AV, 19-May-2020.) |
Ref | Expression |
---|---|
refdivmptfv | ⊢ (((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ (𝐺 supp 0)) → ((𝐹 /f 𝐺)‘𝑋) = ((𝐹‘𝑋) / (𝐺‘𝑋))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 22 | . . . . . 6 ⊢ (𝐹:𝐴⟶ℝ → 𝐹:𝐴⟶ℝ) | |
2 | ax-resscn 10859 | . . . . . . 7 ⊢ ℝ ⊆ ℂ | |
3 | 2 | a1i 11 | . . . . . 6 ⊢ (𝐹:𝐴⟶ℝ → ℝ ⊆ ℂ) |
4 | 1, 3 | fssd 6602 | . . . . 5 ⊢ (𝐹:𝐴⟶ℝ → 𝐹:𝐴⟶ℂ) |
5 | id 22 | . . . . . 6 ⊢ (𝐺:𝐴⟶ℝ → 𝐺:𝐴⟶ℝ) | |
6 | 2 | a1i 11 | . . . . . 6 ⊢ (𝐺:𝐴⟶ℝ → ℝ ⊆ ℂ) |
7 | 5, 6 | fssd 6602 | . . . . 5 ⊢ (𝐺:𝐴⟶ℝ → 𝐺:𝐴⟶ℂ) |
8 | id 22 | . . . . 5 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ 𝑉) | |
9 | 4, 7, 8 | 3anim123i 1149 | . . . 4 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → (𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉)) |
10 | fdivmpt 45774 | . . . 4 ⊢ ((𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉) → (𝐹 /f 𝐺) = (𝑥 ∈ (𝐺 supp 0) ↦ ((𝐹‘𝑥) / (𝐺‘𝑥)))) | |
11 | 9, 10 | syl 17 | . . 3 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → (𝐹 /f 𝐺) = (𝑥 ∈ (𝐺 supp 0) ↦ ((𝐹‘𝑥) / (𝐺‘𝑥)))) |
12 | 11 | adantr 480 | . 2 ⊢ (((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ (𝐺 supp 0)) → (𝐹 /f 𝐺) = (𝑥 ∈ (𝐺 supp 0) ↦ ((𝐹‘𝑥) / (𝐺‘𝑥)))) |
13 | fveq2 6756 | . . . 4 ⊢ (𝑥 = 𝑋 → (𝐹‘𝑥) = (𝐹‘𝑋)) | |
14 | fveq2 6756 | . . . 4 ⊢ (𝑥 = 𝑋 → (𝐺‘𝑥) = (𝐺‘𝑋)) | |
15 | 13, 14 | oveq12d 7273 | . . 3 ⊢ (𝑥 = 𝑋 → ((𝐹‘𝑥) / (𝐺‘𝑥)) = ((𝐹‘𝑋) / (𝐺‘𝑋))) |
16 | 15 | adantl 481 | . 2 ⊢ ((((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ (𝐺 supp 0)) ∧ 𝑥 = 𝑋) → ((𝐹‘𝑥) / (𝐺‘𝑥)) = ((𝐹‘𝑋) / (𝐺‘𝑋))) |
17 | simpr 484 | . 2 ⊢ (((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ (𝐺 supp 0)) → 𝑋 ∈ (𝐺 supp 0)) | |
18 | ovexd 7290 | . 2 ⊢ (((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ (𝐺 supp 0)) → ((𝐹‘𝑋) / (𝐺‘𝑋)) ∈ V) | |
19 | 12, 16, 17, 18 | fvmptd 6864 | 1 ⊢ (((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ (𝐺 supp 0)) → ((𝐹 /f 𝐺)‘𝑋) = ((𝐹‘𝑋) / (𝐺‘𝑋))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 Vcvv 3422 ⊆ wss 3883 ↦ cmpt 5153 ⟶wf 6414 ‘cfv 6418 (class class class)co 7255 supp csupp 7948 ℂcc 10800 ℝcr 10801 0cc0 10802 / cdiv 11562 /f cfdiv 45771 |
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-pr 5347 ax-un 7566 ax-resscn 10859 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 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-ral 3068 df-rex 3069 df-reu 3070 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-nul 4254 df-if 4457 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-id 5480 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-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-ov 7258 df-oprab 7259 df-mpo 7260 df-of 7511 df-supp 7949 df-fdiv 45772 |
This theorem is referenced by: elbigolo1 45791 |
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