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| Mirrors > Home > ILE Home > Th. List > replim | GIF version | ||
| Description: Reconstruct a complex number from its real and imaginary parts. (Contributed by NM, 10-May-1999.) (Revised by Mario Carneiro, 7-Nov-2013.) |
| Ref | Expression |
|---|---|
| replim | ⊢ (𝐴 ∈ ℂ → 𝐴 = ((ℜ‘𝐴) + (i · (ℑ‘𝐴)))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cnre 8158 | . 2 ⊢ (𝐴 ∈ ℂ → ∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ 𝐴 = (𝑥 + (i · 𝑦))) | |
| 2 | crre 11389 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (ℜ‘(𝑥 + (i · 𝑦))) = 𝑥) | |
| 3 | crim 11390 | . . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (ℑ‘(𝑥 + (i · 𝑦))) = 𝑦) | |
| 4 | 3 | oveq2d 6026 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (i · (ℑ‘(𝑥 + (i · 𝑦)))) = (i · 𝑦)) |
| 5 | 2, 4 | oveq12d 6028 | . . . . 5 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((ℜ‘(𝑥 + (i · 𝑦))) + (i · (ℑ‘(𝑥 + (i · 𝑦))))) = (𝑥 + (i · 𝑦))) |
| 6 | 5 | eqcomd 2235 | . . . 4 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝑥 + (i · 𝑦)) = ((ℜ‘(𝑥 + (i · 𝑦))) + (i · (ℑ‘(𝑥 + (i · 𝑦)))))) |
| 7 | id 19 | . . . . 5 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → 𝐴 = (𝑥 + (i · 𝑦))) | |
| 8 | fveq2 5632 | . . . . . 6 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → (ℜ‘𝐴) = (ℜ‘(𝑥 + (i · 𝑦)))) | |
| 9 | fveq2 5632 | . . . . . . 7 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → (ℑ‘𝐴) = (ℑ‘(𝑥 + (i · 𝑦)))) | |
| 10 | 9 | oveq2d 6026 | . . . . . 6 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → (i · (ℑ‘𝐴)) = (i · (ℑ‘(𝑥 + (i · 𝑦))))) |
| 11 | 8, 10 | oveq12d 6028 | . . . . 5 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → ((ℜ‘𝐴) + (i · (ℑ‘𝐴))) = ((ℜ‘(𝑥 + (i · 𝑦))) + (i · (ℑ‘(𝑥 + (i · 𝑦)))))) |
| 12 | 7, 11 | eqeq12d 2244 | . . . 4 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → (𝐴 = ((ℜ‘𝐴) + (i · (ℑ‘𝐴))) ↔ (𝑥 + (i · 𝑦)) = ((ℜ‘(𝑥 + (i · 𝑦))) + (i · (ℑ‘(𝑥 + (i · 𝑦))))))) |
| 13 | 6, 12 | syl5ibrcom 157 | . . 3 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝐴 = (𝑥 + (i · 𝑦)) → 𝐴 = ((ℜ‘𝐴) + (i · (ℑ‘𝐴))))) |
| 14 | 13 | rexlimivv 2654 | . 2 ⊢ (∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ 𝐴 = (𝑥 + (i · 𝑦)) → 𝐴 = ((ℜ‘𝐴) + (i · (ℑ‘𝐴)))) |
| 15 | 1, 14 | syl 14 | 1 ⊢ (𝐴 ∈ ℂ → 𝐴 = ((ℜ‘𝐴) + (i · (ℑ‘𝐴)))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1395 ∈ wcel 2200 ∃wrex 2509 ‘cfv 5321 (class class class)co 6010 ℂcc 8013 ℝcr 8014 ici 8017 + caddc 8018 · cmul 8020 ℜcre 11372 ℑcim 11373 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4202 ax-pow 4259 ax-pr 4294 ax-un 4525 ax-setind 4630 ax-cnex 8106 ax-resscn 8107 ax-1cn 8108 ax-1re 8109 ax-icn 8110 ax-addcl 8111 ax-addrcl 8112 ax-mulcl 8113 ax-mulrcl 8114 ax-addcom 8115 ax-mulcom 8116 ax-addass 8117 ax-mulass 8118 ax-distr 8119 ax-i2m1 8120 ax-0lt1 8121 ax-1rid 8122 ax-0id 8123 ax-rnegex 8124 ax-precex 8125 ax-cnre 8126 ax-pre-ltirr 8127 ax-pre-ltwlin 8128 ax-pre-lttrn 8129 ax-pre-apti 8130 ax-pre-ltadd 8131 ax-pre-mulgt0 8132 ax-pre-mulext 8133 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-reu 2515 df-rmo 2516 df-rab 2517 df-v 2801 df-sbc 3029 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-br 4084 df-opab 4146 df-mpt 4147 df-id 4385 df-po 4388 df-iso 4389 df-xp 4726 df-rel 4727 df-cnv 4728 df-co 4729 df-dm 4730 df-rn 4731 df-res 4732 df-ima 4733 df-iota 5281 df-fun 5323 df-fn 5324 df-f 5325 df-fv 5329 df-riota 5963 df-ov 6013 df-oprab 6014 df-mpo 6015 df-pnf 8199 df-mnf 8200 df-xr 8201 df-ltxr 8202 df-le 8203 df-sub 8335 df-neg 8336 df-reap 8738 df-ap 8745 df-div 8836 df-2 9185 df-cj 11374 df-re 11375 df-im 11376 |
| This theorem is referenced by: remim 11392 reim0b 11394 rereb 11395 mulreap 11396 cjreb 11398 reneg 11400 readd 11401 remullem 11403 imneg 11408 imadd 11409 cjcj 11415 imval2 11426 cnrecnv 11442 replimi 11446 replimd 11473 cnreim 11510 abs00ap 11594 recan 11641 efeul 12266 absef 12302 absefib 12303 efieq1re 12304 |
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