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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 14693. (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 464 | . . . . 5 ⊢ (((𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) ∧ 𝐴 ∈ ℂ) ↔ (𝐴 ∈ ℂ ∧ (𝐵 ∈ ℝ ∧ 𝐵 ≠ 0))) | |
2 | 3anass 1097 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) ↔ (𝐴 ∈ ℂ ∧ (𝐵 ∈ ℝ ∧ 𝐵 ≠ 0))) | |
3 | 1, 2 | bitr4i 281 | . . . 4 ⊢ (((𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) ∧ 𝐴 ∈ ℂ) ↔ (𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0)) |
4 | rereccl 11550 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → (1 / 𝐵) ∈ ℝ) | |
5 | 4 | anim1i 618 | . . . 4 ⊢ (((𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) ∧ 𝐴 ∈ ℂ) → ((1 / 𝐵) ∈ ℝ ∧ 𝐴 ∈ ℂ)) |
6 | 3, 5 | sylbir 238 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → ((1 / 𝐵) ∈ ℝ ∧ 𝐴 ∈ ℂ)) |
7 | remul2 14693 | . . 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 10819 | . . 3 ⊢ (𝐵 ∈ ℝ → 𝐵 ∈ ℂ) | |
10 | divrec2 11507 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (𝐴 / 𝐵) = ((1 / 𝐵) · 𝐴)) | |
11 | 10 | fveq2d 6721 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐵 ≠ 0) → (ℜ‘(𝐴 / 𝐵)) = (ℜ‘((1 / 𝐵) · 𝐴))) |
12 | 9, 11 | syl3an2 1166 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → (ℜ‘(𝐴 / 𝐵)) = (ℜ‘((1 / 𝐵) · 𝐴))) |
13 | recl 14673 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (ℜ‘𝐴) ∈ ℝ) | |
14 | 13 | recnd 10861 | . . . 4 ⊢ (𝐴 ∈ ℂ → (ℜ‘𝐴) ∈ ℂ) |
15 | 14 | 3ad2ant1 1135 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → (ℜ‘𝐴) ∈ ℂ) |
16 | 9 | 3ad2ant2 1136 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → 𝐵 ∈ ℂ) |
17 | simp3 1140 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → 𝐵 ≠ 0) | |
18 | 15, 16, 17 | divrec2d 11612 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → ((ℜ‘𝐴) / 𝐵) = ((1 / 𝐵) · (ℜ‘𝐴))) |
19 | 8, 12, 18 | 3eqtr4d 2787 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℝ ∧ 𝐵 ≠ 0) → (ℜ‘(𝐴 / 𝐵)) = ((ℜ‘𝐴) / 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 ∧ w3a 1089 = wceq 1543 ∈ wcel 2110 ≠ wne 2940 ‘cfv 6380 (class class class)co 7213 ℂcc 10727 ℝcr 10728 0cc0 10729 1c1 10730 · cmul 10734 / cdiv 11489 ℜcre 14660 |
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 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2708 ax-sep 5192 ax-nul 5199 ax-pow 5258 ax-pr 5322 ax-un 7523 ax-resscn 10786 ax-1cn 10787 ax-icn 10788 ax-addcl 10789 ax-addrcl 10790 ax-mulcl 10791 ax-mulrcl 10792 ax-mulcom 10793 ax-addass 10794 ax-mulass 10795 ax-distr 10796 ax-i2m1 10797 ax-1ne0 10798 ax-1rid 10799 ax-rnegex 10800 ax-rrecex 10801 ax-cnre 10802 ax-pre-lttri 10803 ax-pre-lttrn 10804 ax-pre-ltadd 10805 ax-pre-mulgt0 10806 |
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 2071 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3066 df-rex 3067 df-reu 3068 df-rmo 3069 df-rab 3070 df-v 3410 df-sbc 3695 df-csb 3812 df-dif 3869 df-un 3871 df-in 3873 df-ss 3883 df-nul 4238 df-if 4440 df-pw 4515 df-sn 4542 df-pr 4544 df-op 4548 df-uni 4820 df-br 5054 df-opab 5116 df-mpt 5136 df-id 5455 df-po 5468 df-so 5469 df-xp 5557 df-rel 5558 df-cnv 5559 df-co 5560 df-dm 5561 df-rn 5562 df-res 5563 df-ima 5564 df-iota 6338 df-fun 6382 df-fn 6383 df-f 6384 df-f1 6385 df-fo 6386 df-f1o 6387 df-fv 6388 df-riota 7170 df-ov 7216 df-oprab 7217 df-mpo 7218 df-er 8391 df-en 8627 df-dom 8628 df-sdom 8629 df-pnf 10869 df-mnf 10870 df-xr 10871 df-ltxr 10872 df-le 10873 df-sub 11064 df-neg 11065 df-div 11490 df-2 11893 df-cj 14662 df-re 14663 df-im 14664 |
This theorem is referenced by: redivd 14792 |
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