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Mirrors > Home > MPE Home > Th. List > rediv | Structured version Visualization version GIF version |
Description: Real part of a division. Related to remul2 15113. (Contributed by David A. Wheeler, 10-Jun-2015.) |
Ref | Expression |
---|---|
rediv | ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → (ℜ‘(𝐴 / 𝐵)) = ((ℜ‘𝐴) / 𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ancom 459 | . . . . 5 ⊢ (((𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) ∧ 𝐴 ∈ ℂ) ↔ (𝐴 ∈ ℂ ∧ (𝐵 ∈ ℝ ∧ 𝐵 ≠ 0))) | |
2 | 3anass 1092 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) ↔ (𝐴 ∈ ℂ ∧ (𝐵 ∈ ℝ ∧ 𝐵 ≠ 0))) | |
3 | 1, 2 | bitr4i 277 | . . . 4 ⊢ (((𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) ∧ 𝐴 ∈ ℂ) ↔ (𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0)) |
4 | rereccl 11965 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → (1 / 𝐵) ∈ ℝ) | |
5 | 4 | anim1i 613 | . . . 4 ⊢ (((𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) ∧ 𝐴 ∈ ℂ) → ((1 / 𝐵) ∈ ℝ ∧ 𝐴 ∈ ℂ)) |
6 | 3, 5 | sylbir 234 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → ((1 / 𝐵) ∈ ℝ ∧ 𝐴 ∈ ℂ)) |
7 | remul2 15113 | . . 3 ⊢ (((1 / 𝐵) ∈ ℝ ∧ 𝐴 ∈ ℂ) → (ℜ‘((1 / 𝐵) · 𝐴)) = ((1 / 𝐵) · (ℜ‘𝐴))) | |
8 | 6, 7 | syl 17 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → (ℜ‘((1 / 𝐵) · 𝐴)) = ((1 / 𝐵) · (ℜ‘𝐴))) |
9 | recn 11230 | . . 3 ⊢ (𝐵 ∈ ℝ → 𝐵 ∈ ℂ) | |
10 | divrec2 11922 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (𝐴 / 𝐵) = ((1 / 𝐵) · 𝐴)) | |
11 | 10 | fveq2d 6900 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (ℜ‘(𝐴 / 𝐵)) = (ℜ‘((1 / 𝐵) · 𝐴))) |
12 | 9, 11 | syl3an2 1161 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → (ℜ‘(𝐴 / 𝐵)) = (ℜ‘((1 / 𝐵) · 𝐴))) |
13 | recl 15093 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (ℜ‘𝐴) ∈ ℝ) | |
14 | 13 | recnd 11274 | . . . 4 ⊢ (𝐴 ∈ ℂ → (ℜ‘𝐴) ∈ ℂ) |
15 | 14 | 3ad2ant1 1130 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → (ℜ‘𝐴) ∈ ℂ) |
16 | 9 | 3ad2ant2 1131 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → 𝐵 ∈ ℂ) |
17 | simp3 1135 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → 𝐵 ≠ 0) | |
18 | 15, 16, 17 | divrec2d 12027 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → ((ℜ‘𝐴) / 𝐵) = ((1 / 𝐵) · (ℜ‘𝐴))) |
19 | 8, 12, 18 | 3eqtr4d 2775 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → (ℜ‘(𝐴 / 𝐵)) = ((ℜ‘𝐴) / 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 394 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 ≠ wne 2929 ‘cfv 6549 (class class class)co 7419 ℂcc 11138 ℝcr 11139 0cc0 11140 1c1 11141 · cmul 11145 / cdiv 11903 ℜcre 15080 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2696 ax-sep 5300 ax-nul 5307 ax-pow 5365 ax-pr 5429 ax-un 7741 ax-resscn 11197 ax-1cn 11198 ax-icn 11199 ax-addcl 11200 ax-addrcl 11201 ax-mulcl 11202 ax-mulrcl 11203 ax-mulcom 11204 ax-addass 11205 ax-mulass 11206 ax-distr 11207 ax-i2m1 11208 ax-1ne0 11209 ax-1rid 11210 ax-rnegex 11211 ax-rrecex 11212 ax-cnre 11213 ax-pre-lttri 11214 ax-pre-lttrn 11215 ax-pre-ltadd 11216 ax-pre-mulgt0 11217 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2703 df-cleq 2717 df-clel 2802 df-nfc 2877 df-ne 2930 df-nel 3036 df-ral 3051 df-rex 3060 df-rmo 3363 df-reu 3364 df-rab 3419 df-v 3463 df-sbc 3774 df-csb 3890 df-dif 3947 df-un 3949 df-in 3951 df-ss 3961 df-nul 4323 df-if 4531 df-pw 4606 df-sn 4631 df-pr 4633 df-op 4637 df-uni 4910 df-br 5150 df-opab 5212 df-mpt 5233 df-id 5576 df-po 5590 df-so 5591 df-xp 5684 df-rel 5685 df-cnv 5686 df-co 5687 df-dm 5688 df-rn 5689 df-res 5690 df-ima 5691 df-iota 6501 df-fun 6551 df-fn 6552 df-f 6553 df-f1 6554 df-fo 6555 df-f1o 6556 df-fv 6557 df-riota 7375 df-ov 7422 df-oprab 7423 df-mpo 7424 df-er 8725 df-en 8965 df-dom 8966 df-sdom 8967 df-pnf 11282 df-mnf 11283 df-xr 11284 df-ltxr 11285 df-le 11286 df-sub 11478 df-neg 11479 df-div 11904 df-2 12308 df-cj 15082 df-re 15083 df-im 15084 |
This theorem is referenced by: redivd 15212 |
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