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 9872 | . . . . . . 7 ⊢ ℝ ⊆ ℂ | |
3 | 2 | a1i 11 | . . . . . 6 ⊢ (𝐹:𝐴⟶ℝ → ℝ ⊆ ℂ) |
4 | 1, 3 | fssd 5970 | . . . . 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 5970 | . . . . 5 ⊢ (𝐺:𝐴⟶ℝ → 𝐺:𝐴⟶ℂ) |
8 | id 22 | . . . . 5 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ 𝑉) | |
9 | 4, 7, 8 | 3anim123i 1240 | . . . 4 ⊢ ((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) → (𝐹:𝐴⟶ℂ ∧ 𝐺:𝐴⟶ℂ ∧ 𝐴 ∈ 𝑉)) |
10 | fdivmpt 42132 | . . . 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 6103 | . . . 4 ⊢ (𝑥 = 𝑋 → (𝐹‘𝑥) = (𝐹‘𝑋)) | |
14 | fveq2 6103 | . . . 4 ⊢ (𝑥 = 𝑋 → (𝐺‘𝑥) = (𝐺‘𝑋)) | |
15 | 13, 14 | oveq12d 6567 | . . 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 476 | . 2 ⊢ (((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ (𝐺 supp 0)) → 𝑋 ∈ (𝐺 supp 0)) | |
18 | ovex 6577 | . . 3 ⊢ ((𝐹‘𝑋) / (𝐺‘𝑋)) ∈ V | |
19 | 18 | a1i 11 | . 2 ⊢ (((𝐹:𝐴⟶ℝ ∧ 𝐺:𝐴⟶ℝ ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ (𝐺 supp 0)) → ((𝐹‘𝑋) / (𝐺‘𝑋)) ∈ V) |
20 | 12, 16, 17, 19 | fvmptd 6197 | 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 383 ∧ w3a 1031 = wceq 1475 ∈ wcel 1977 Vcvv 3173 ⊆ wss 3540 ↦ cmpt 4643 ⟶wf 5800 ‘cfv 5804 (class class class)co 6549 supp csupp 7182 ℂcc 9813 ℝcr 9814 0cc0 9815 / cdiv 10563 /f cfdiv 42129 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-resscn 9872 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-ral 2901 df-rex 2902 df-reu 2903 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-id 4953 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-of 6795 df-supp 7183 df-fdiv 42130 |
This theorem is referenced by: elbigolo1 42149 |
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