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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 8041 | . 2 ⊢ (𝐴 ∈ ℂ → ∃𝑥 ∈ ℝ ∃𝑦 ∈ ℝ 𝐴 = (𝑥 + (i · 𝑦))) | |
| 2 | crre 11041 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (ℜ‘(𝑥 + (i · 𝑦))) = 𝑥) | |
| 3 | crim 11042 | . . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (ℑ‘(𝑥 + (i · 𝑦))) = 𝑦) | |
| 4 | 3 | oveq2d 5941 | . . . . . 6 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (i · (ℑ‘(𝑥 + (i · 𝑦)))) = (i · 𝑦)) |
| 5 | 2, 4 | oveq12d 5943 | . . . . 5 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((ℜ‘(𝑥 + (i · 𝑦))) + (i · (ℑ‘(𝑥 + (i · 𝑦))))) = (𝑥 + (i · 𝑦))) |
| 6 | 5 | eqcomd 2202 | . . . 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 5561 | . . . . . 6 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → (ℜ‘𝐴) = (ℜ‘(𝑥 + (i · 𝑦)))) | |
| 9 | fveq2 5561 | . . . . . . 7 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → (ℑ‘𝐴) = (ℑ‘(𝑥 + (i · 𝑦)))) | |
| 10 | 9 | oveq2d 5941 | . . . . . 6 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → (i · (ℑ‘𝐴)) = (i · (ℑ‘(𝑥 + (i · 𝑦))))) |
| 11 | 8, 10 | oveq12d 5943 | . . . . 5 ⊢ (𝐴 = (𝑥 + (i · 𝑦)) → ((ℜ‘𝐴) + (i · (ℑ‘𝐴))) = ((ℜ‘(𝑥 + (i · 𝑦))) + (i · (ℑ‘(𝑥 + (i · 𝑦)))))) |
| 12 | 7, 11 | eqeq12d 2211 | . . . 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 2620 | . 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 1364 ∈ wcel 2167 ∃wrex 2476 ‘cfv 5259 (class class class)co 5925 ℂcc 7896 ℝcr 7897 ici 7900 + caddc 7901 · cmul 7903 ℜcre 11024 ℑcim 11025 |
| 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 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-sep 4152 ax-pow 4208 ax-pr 4243 ax-un 4469 ax-setind 4574 ax-cnex 7989 ax-resscn 7990 ax-1cn 7991 ax-1re 7992 ax-icn 7993 ax-addcl 7994 ax-addrcl 7995 ax-mulcl 7996 ax-mulrcl 7997 ax-addcom 7998 ax-mulcom 7999 ax-addass 8000 ax-mulass 8001 ax-distr 8002 ax-i2m1 8003 ax-0lt1 8004 ax-1rid 8005 ax-0id 8006 ax-rnegex 8007 ax-precex 8008 ax-cnre 8009 ax-pre-ltirr 8010 ax-pre-ltwlin 8011 ax-pre-lttrn 8012 ax-pre-apti 8013 ax-pre-ltadd 8014 ax-pre-mulgt0 8015 ax-pre-mulext 8016 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ne 2368 df-nel 2463 df-ral 2480 df-rex 2481 df-reu 2482 df-rmo 2483 df-rab 2484 df-v 2765 df-sbc 2990 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-uni 3841 df-br 4035 df-opab 4096 df-mpt 4097 df-id 4329 df-po 4332 df-iso 4333 df-xp 4670 df-rel 4671 df-cnv 4672 df-co 4673 df-dm 4674 df-rn 4675 df-res 4676 df-ima 4677 df-iota 5220 df-fun 5261 df-fn 5262 df-f 5263 df-fv 5267 df-riota 5880 df-ov 5928 df-oprab 5929 df-mpo 5930 df-pnf 8082 df-mnf 8083 df-xr 8084 df-ltxr 8085 df-le 8086 df-sub 8218 df-neg 8219 df-reap 8621 df-ap 8628 df-div 8719 df-2 9068 df-cj 11026 df-re 11027 df-im 11028 |
| This theorem is referenced by: remim 11044 reim0b 11046 rereb 11047 mulreap 11048 cjreb 11050 reneg 11052 readd 11053 remullem 11055 imneg 11060 imadd 11061 cjcj 11067 imval2 11078 cnrecnv 11094 replimi 11098 replimd 11125 cnreim 11162 abs00ap 11246 recan 11293 efeul 11918 absef 11954 absefib 11955 efieq1re 11956 |
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