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Mirrors > Home > ILE Home > Th. List > cjth | GIF version |
Description: The defining property of the complex conjugate. (Contributed by Mario Carneiro, 6-Nov-2013.) |
Ref | Expression |
---|---|
cjth | ⊢ (𝐴 ∈ ℂ → ((𝐴 + (∗‘𝐴)) ∈ ℝ ∧ (i · (𝐴 − (∗‘𝐴))) ∈ ℝ)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cju 8864 | . . . 4 ⊢ (𝐴 ∈ ℂ → ∃!𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ)) | |
2 | riotasbc 5821 | . . . 4 ⊢ (∃!𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ) → [(℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ)) / 𝑥]((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ)) | |
3 | 1, 2 | syl 14 | . . 3 ⊢ (𝐴 ∈ ℂ → [(℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ)) / 𝑥]((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ)) |
4 | cjval 10796 | . . . 4 ⊢ (𝐴 ∈ ℂ → (∗‘𝐴) = (℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ))) | |
5 | 4 | sbceq1d 2960 | . . 3 ⊢ (𝐴 ∈ ℂ → ([(∗‘𝐴) / 𝑥]((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ) ↔ [(℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ)) / 𝑥]((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ))) |
6 | 3, 5 | mpbird 166 | . 2 ⊢ (𝐴 ∈ ℂ → [(∗‘𝐴) / 𝑥]((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ)) |
7 | riotacl 5820 | . . . . 5 ⊢ (∃!𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ) → (℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ)) ∈ ℂ) | |
8 | 1, 7 | syl 14 | . . . 4 ⊢ (𝐴 ∈ ℂ → (℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ)) ∈ ℂ) |
9 | 4, 8 | eqeltrd 2247 | . . 3 ⊢ (𝐴 ∈ ℂ → (∗‘𝐴) ∈ ℂ) |
10 | oveq2 5858 | . . . . . 6 ⊢ (𝑥 = (∗‘𝐴) → (𝐴 + 𝑥) = (𝐴 + (∗‘𝐴))) | |
11 | 10 | eleq1d 2239 | . . . . 5 ⊢ (𝑥 = (∗‘𝐴) → ((𝐴 + 𝑥) ∈ ℝ ↔ (𝐴 + (∗‘𝐴)) ∈ ℝ)) |
12 | oveq2 5858 | . . . . . . 7 ⊢ (𝑥 = (∗‘𝐴) → (𝐴 − 𝑥) = (𝐴 − (∗‘𝐴))) | |
13 | 12 | oveq2d 5866 | . . . . . 6 ⊢ (𝑥 = (∗‘𝐴) → (i · (𝐴 − 𝑥)) = (i · (𝐴 − (∗‘𝐴)))) |
14 | 13 | eleq1d 2239 | . . . . 5 ⊢ (𝑥 = (∗‘𝐴) → ((i · (𝐴 − 𝑥)) ∈ ℝ ↔ (i · (𝐴 − (∗‘𝐴))) ∈ ℝ)) |
15 | 11, 14 | anbi12d 470 | . . . 4 ⊢ (𝑥 = (∗‘𝐴) → (((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ) ↔ ((𝐴 + (∗‘𝐴)) ∈ ℝ ∧ (i · (𝐴 − (∗‘𝐴))) ∈ ℝ))) |
16 | 15 | sbcieg 2987 | . . 3 ⊢ ((∗‘𝐴) ∈ ℂ → ([(∗‘𝐴) / 𝑥]((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ) ↔ ((𝐴 + (∗‘𝐴)) ∈ ℝ ∧ (i · (𝐴 − (∗‘𝐴))) ∈ ℝ))) |
17 | 9, 16 | syl 14 | . 2 ⊢ (𝐴 ∈ ℂ → ([(∗‘𝐴) / 𝑥]((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ) ↔ ((𝐴 + (∗‘𝐴)) ∈ ℝ ∧ (i · (𝐴 − (∗‘𝐴))) ∈ ℝ))) |
18 | 6, 17 | mpbid 146 | 1 ⊢ (𝐴 ∈ ℂ → ((𝐴 + (∗‘𝐴)) ∈ ℝ ∧ (i · (𝐴 − (∗‘𝐴))) ∈ ℝ)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 = wceq 1348 ∈ wcel 2141 ∃!wreu 2450 [wsbc 2955 ‘cfv 5196 ℩crio 5805 (class class class)co 5850 ℂcc 7759 ℝcr 7760 ici 7763 + caddc 7764 · cmul 7766 − cmin 8077 ∗ccj 10790 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-sep 4105 ax-pow 4158 ax-pr 4192 ax-un 4416 ax-setind 4519 ax-cnex 7852 ax-resscn 7853 ax-1cn 7854 ax-1re 7855 ax-icn 7856 ax-addcl 7857 ax-addrcl 7858 ax-mulcl 7859 ax-mulrcl 7860 ax-addcom 7861 ax-mulcom 7862 ax-addass 7863 ax-mulass 7864 ax-distr 7865 ax-i2m1 7866 ax-0lt1 7867 ax-1rid 7868 ax-0id 7869 ax-rnegex 7870 ax-precex 7871 ax-cnre 7872 ax-pre-ltirr 7873 ax-pre-lttrn 7875 ax-pre-apti 7876 ax-pre-ltadd 7877 ax-pre-mulgt0 7878 |
This theorem depends on definitions: df-bi 116 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-nel 2436 df-ral 2453 df-rex 2454 df-reu 2455 df-rmo 2456 df-rab 2457 df-v 2732 df-sbc 2956 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-pw 3566 df-sn 3587 df-pr 3588 df-op 3590 df-uni 3795 df-br 3988 df-opab 4049 df-mpt 4050 df-id 4276 df-xp 4615 df-rel 4616 df-cnv 4617 df-co 4618 df-dm 4619 df-iota 5158 df-fun 5198 df-fv 5204 df-riota 5806 df-ov 5853 df-oprab 5854 df-mpo 5855 df-pnf 7943 df-mnf 7944 df-ltxr 7946 df-sub 8079 df-neg 8080 df-reap 8481 df-cj 10793 |
This theorem is referenced by: recl 10804 crre 10808 |
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