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Mirrors > Home > ILE Home > Th. List > recj | GIF version |
Description: Real part of a complex conjugate. (Contributed by Mario Carneiro, 14-Jul-2014.) |
Ref | Expression |
---|---|
recj | ⊢ (𝐴 ∈ ℂ → (ℜ‘(∗‘𝐴)) = (ℜ‘𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | recl 10518 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → (ℜ‘𝐴) ∈ ℝ) | |
2 | 1 | recnd 7718 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (ℜ‘𝐴) ∈ ℂ) |
3 | ax-icn 7640 | . . . . . 6 ⊢ i ∈ ℂ | |
4 | imcl 10519 | . . . . . . 7 ⊢ (𝐴 ∈ ℂ → (ℑ‘𝐴) ∈ ℝ) | |
5 | 4 | recnd 7718 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → (ℑ‘𝐴) ∈ ℂ) |
6 | mulcl 7671 | . . . . . 6 ⊢ ((i ∈ ℂ ∧ (ℑ‘𝐴) ∈ ℂ) → (i · (ℑ‘𝐴)) ∈ ℂ) | |
7 | 3, 5, 6 | sylancr 408 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (i · (ℑ‘𝐴)) ∈ ℂ) |
8 | 2, 7 | negsubd 8002 | . . . 4 ⊢ (𝐴 ∈ ℂ → ((ℜ‘𝐴) + -(i · (ℑ‘𝐴))) = ((ℜ‘𝐴) − (i · (ℑ‘𝐴)))) |
9 | mulneg2 8077 | . . . . . 6 ⊢ ((i ∈ ℂ ∧ (ℑ‘𝐴) ∈ ℂ) → (i · -(ℑ‘𝐴)) = -(i · (ℑ‘𝐴))) | |
10 | 3, 5, 9 | sylancr 408 | . . . . 5 ⊢ (𝐴 ∈ ℂ → (i · -(ℑ‘𝐴)) = -(i · (ℑ‘𝐴))) |
11 | 10 | oveq2d 5744 | . . . 4 ⊢ (𝐴 ∈ ℂ → ((ℜ‘𝐴) + (i · -(ℑ‘𝐴))) = ((ℜ‘𝐴) + -(i · (ℑ‘𝐴)))) |
12 | remim 10525 | . . . 4 ⊢ (𝐴 ∈ ℂ → (∗‘𝐴) = ((ℜ‘𝐴) − (i · (ℑ‘𝐴)))) | |
13 | 8, 11, 12 | 3eqtr4rd 2158 | . . 3 ⊢ (𝐴 ∈ ℂ → (∗‘𝐴) = ((ℜ‘𝐴) + (i · -(ℑ‘𝐴)))) |
14 | 13 | fveq2d 5379 | . 2 ⊢ (𝐴 ∈ ℂ → (ℜ‘(∗‘𝐴)) = (ℜ‘((ℜ‘𝐴) + (i · -(ℑ‘𝐴))))) |
15 | 4 | renegcld 8061 | . . 3 ⊢ (𝐴 ∈ ℂ → -(ℑ‘𝐴) ∈ ℝ) |
16 | crre 10522 | . . 3 ⊢ (((ℜ‘𝐴) ∈ ℝ ∧ -(ℑ‘𝐴) ∈ ℝ) → (ℜ‘((ℜ‘𝐴) + (i · -(ℑ‘𝐴)))) = (ℜ‘𝐴)) | |
17 | 1, 15, 16 | syl2anc 406 | . 2 ⊢ (𝐴 ∈ ℂ → (ℜ‘((ℜ‘𝐴) + (i · -(ℑ‘𝐴)))) = (ℜ‘𝐴)) |
18 | 14, 17 | eqtrd 2147 | 1 ⊢ (𝐴 ∈ ℂ → (ℜ‘(∗‘𝐴)) = (ℜ‘𝐴)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1314 ∈ wcel 1463 ‘cfv 5081 (class class class)co 5728 ℂcc 7545 ℝcr 7546 ici 7549 + caddc 7550 · cmul 7552 − cmin 7856 -cneg 7857 ∗ccj 10504 ℜcre 10505 ℑcim 10506 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 586 ax-in2 587 ax-io 681 ax-5 1406 ax-7 1407 ax-gen 1408 ax-ie1 1452 ax-ie2 1453 ax-8 1465 ax-10 1466 ax-11 1467 ax-i12 1468 ax-bndl 1469 ax-4 1470 ax-13 1474 ax-14 1475 ax-17 1489 ax-i9 1493 ax-ial 1497 ax-i5r 1498 ax-ext 2097 ax-sep 4006 ax-pow 4058 ax-pr 4091 ax-un 4315 ax-setind 4412 ax-cnex 7636 ax-resscn 7637 ax-1cn 7638 ax-1re 7639 ax-icn 7640 ax-addcl 7641 ax-addrcl 7642 ax-mulcl 7643 ax-mulrcl 7644 ax-addcom 7645 ax-mulcom 7646 ax-addass 7647 ax-mulass 7648 ax-distr 7649 ax-i2m1 7650 ax-0lt1 7651 ax-1rid 7652 ax-0id 7653 ax-rnegex 7654 ax-precex 7655 ax-cnre 7656 ax-pre-ltirr 7657 ax-pre-ltwlin 7658 ax-pre-lttrn 7659 ax-pre-apti 7660 ax-pre-ltadd 7661 ax-pre-mulgt0 7662 ax-pre-mulext 7663 |
This theorem depends on definitions: df-bi 116 df-3an 947 df-tru 1317 df-fal 1320 df-nf 1420 df-sb 1719 df-eu 1978 df-mo 1979 df-clab 2102 df-cleq 2108 df-clel 2111 df-nfc 2244 df-ne 2283 df-nel 2378 df-ral 2395 df-rex 2396 df-reu 2397 df-rmo 2398 df-rab 2399 df-v 2659 df-sbc 2879 df-dif 3039 df-un 3041 df-in 3043 df-ss 3050 df-pw 3478 df-sn 3499 df-pr 3500 df-op 3502 df-uni 3703 df-br 3896 df-opab 3950 df-mpt 3951 df-id 4175 df-po 4178 df-iso 4179 df-xp 4505 df-rel 4506 df-cnv 4507 df-co 4508 df-dm 4509 df-rn 4510 df-res 4511 df-ima 4512 df-iota 5046 df-fun 5083 df-fn 5084 df-f 5085 df-fv 5089 df-riota 5684 df-ov 5731 df-oprab 5732 df-mpo 5733 df-pnf 7726 df-mnf 7727 df-xr 7728 df-ltxr 7729 df-le 7730 df-sub 7858 df-neg 7859 df-reap 8255 df-ap 8262 df-div 8346 df-2 8689 df-cj 10507 df-re 10508 df-im 10509 |
This theorem is referenced by: cjcj 10548 ipcnval 10551 recji 10584 recjd 10614 |
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