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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 8266 | . 2 ⊢ (𝐴 ∈ ℂ → ∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ 𝐴 = (𝑥 + (i · 𝑦))) | |
| 2 | crre 11535 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (ℜ‘(𝑥 + (i · 𝑦))) = 𝑥) | |
| 3 | crim 11536 | . . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (ℑ‘(𝑥 + (i · 𝑦))) = 𝑦) | |
| 4 | 3 | oveq2d 6065 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (i · (ℑ‘(𝑥 + (i · 𝑦)))) = (i · 𝑦)) |
| 5 | 2, 4 | oveq12d 6067 | . . . . 5 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((ℜ‘(𝑥 + (i · 𝑦))) + (i · (ℑ‘(𝑥 + (i · 𝑦))))) = (𝑥 + (i · 𝑦))) |
| 6 | 5 | eqcomd 2238 | . . . 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 5669 | . . . . . 6 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → (ℜ‘𝐴) = (ℜ‘(𝑥 + (i · 𝑦)))) | |
| 9 | fveq2 5669 | . . . . . . 7 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → (ℑ‘𝐴) = (ℑ‘(𝑥 + (i · 𝑦)))) | |
| 10 | 9 | oveq2d 6065 | . . . . . 6 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → (i · (ℑ‘𝐴)) = (i · (ℑ‘(𝑥 + (i · 𝑦))))) |
| 11 | 8, 10 | oveq12d 6067 | . . . . 5 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → ((ℜ‘𝐴) + (i · (ℑ‘𝐴))) = ((ℜ‘(𝑥 + (i · 𝑦))) + (i · (ℑ‘(𝑥 + (i · 𝑦)))))) |
| 12 | 7, 11 | eqeq12d 2247 | . . . 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 2666 | . 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 1398 ∈ wcel 2203 ∃wrex 2521 ‘cfv 5351 (class class class)co 6049 ℂcc 8121 ℝcr 8122 ici 8125 + caddc 8126 · cmul 8128 ℜcre 11518 ℑcim 11519 |
| 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 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2205 ax-14 2206 ax-ext 2214 ax-sep 4227 ax-pow 4286 ax-pr 4321 ax-un 4553 ax-setind 4658 ax-cnex 8214 ax-resscn 8215 ax-1cn 8216 ax-1re 8217 ax-icn 8218 ax-addcl 8219 ax-addrcl 8220 ax-mulcl 8221 ax-mulrcl 8222 ax-addcom 8223 ax-mulcom 8224 ax-addass 8225 ax-mulass 8226 ax-distr 8227 ax-i2m1 8228 ax-0lt1 8229 ax-1rid 8230 ax-0id 8231 ax-rnegex 8232 ax-precex 8233 ax-cnre 8234 ax-pre-ltirr 8235 ax-pre-ltwlin 8236 ax-pre-lttrn 8237 ax-pre-apti 8238 ax-pre-ltadd 8239 ax-pre-mulgt0 8240 ax-pre-mulext 8241 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-nel 2508 df-ral 2525 df-rex 2526 df-reu 2527 df-rmo 2528 df-rab 2529 df-v 2814 df-sbc 3042 df-dif 3212 df-un 3214 df-in 3216 df-ss 3223 df-pw 3670 df-sn 3694 df-pr 3695 df-op 3697 df-uni 3914 df-br 4109 df-opab 4171 df-mpt 4172 df-id 4413 df-po 4416 df-iso 4417 df-xp 4754 df-rel 4755 df-cnv 4756 df-co 4757 df-dm 4758 df-rn 4759 df-res 4760 df-ima 4761 df-iota 5311 df-fun 5353 df-fn 5354 df-f 5355 df-fv 5359 df-riota 6002 df-ov 6052 df-oprab 6053 df-mpo 6054 df-pnf 8306 df-mnf 8307 df-xr 8308 df-ltxr 8309 df-le 8310 df-sub 8442 df-neg 8443 df-reap 8845 df-ap 8852 df-div 8943 df-2 9292 df-cj 11520 df-re 11521 df-im 11522 |
| This theorem is referenced by: remim 11538 reim0b 11540 rereb 11541 mulreap 11542 cjreb 11544 reneg 11546 readd 11547 remullem 11549 imneg 11554 imadd 11555 cjcj 11561 imval2 11572 cnrecnv 11588 replimi 11592 replimd 11619 cnreim 11656 abs00ap 11740 recan 11787 efeul 12413 absef 12449 absefib 12450 efieq1re 12451 |
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