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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 8577 | . . . 4 ⊢ (𝐴 ∈ ℂ → ∃!𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ)) | |
2 | riotasbc 5677 | . . . 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 10458 | . . . 4 ⊢ (𝐴 ∈ ℂ → (∗‘𝐴) = (℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ))) | |
5 | 4 | sbceq1d 2867 | . . 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 5676 | . . . . 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 2176 | . . 3 ⊢ (𝐴 ∈ ℂ → (∗‘𝐴) ∈ ℂ) |
10 | oveq2 5714 | . . . . . 6 ⊢ (𝑥 = (∗‘𝐴) → (𝐴 + 𝑥) = (𝐴 + (∗‘𝐴))) | |
11 | 10 | eleq1d 2168 | . . . . 5 ⊢ (𝑥 = (∗‘𝐴) → ((𝐴 + 𝑥) ∈ ℝ ↔ (𝐴 + (∗‘𝐴)) ∈ ℝ)) |
12 | oveq2 5714 | . . . . . . 7 ⊢ (𝑥 = (∗‘𝐴) → (𝐴 − 𝑥) = (𝐴 − (∗‘𝐴))) | |
13 | 12 | oveq2d 5722 | . . . . . 6 ⊢ (𝑥 = (∗‘𝐴) → (i · (𝐴 − 𝑥)) = (i · (𝐴 − (∗‘𝐴)))) |
14 | 13 | eleq1d 2168 | . . . . 5 ⊢ (𝑥 = (∗‘𝐴) → ((i · (𝐴 − 𝑥)) ∈ ℝ ↔ (i · (𝐴 − (∗‘𝐴))) ∈ ℝ)) |
15 | 11, 14 | anbi12d 460 | . . . 4 ⊢ (𝑥 = (∗‘𝐴) → (((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ) ↔ ((𝐴 + (∗‘𝐴)) ∈ ℝ ∧ (i · (𝐴 − (∗‘𝐴))) ∈ ℝ))) |
16 | 15 | sbcieg 2893 | . . 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 1299 ∈ wcel 1448 ∃!wreu 2377 [wsbc 2862 ‘cfv 5059 ℩crio 5661 (class class class)co 5706 ℂcc 7498 ℝcr 7499 ici 7502 + caddc 7503 · cmul 7505 − cmin 7804 ∗ccj 10452 |
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 584 ax-in2 585 ax-io 671 ax-5 1391 ax-7 1392 ax-gen 1393 ax-ie1 1437 ax-ie2 1438 ax-8 1450 ax-10 1451 ax-11 1452 ax-i12 1453 ax-bndl 1454 ax-4 1455 ax-13 1459 ax-14 1460 ax-17 1474 ax-i9 1478 ax-ial 1482 ax-i5r 1483 ax-ext 2082 ax-sep 3986 ax-pow 4038 ax-pr 4069 ax-un 4293 ax-setind 4390 ax-cnex 7586 ax-resscn 7587 ax-1cn 7588 ax-1re 7589 ax-icn 7590 ax-addcl 7591 ax-addrcl 7592 ax-mulcl 7593 ax-mulrcl 7594 ax-addcom 7595 ax-mulcom 7596 ax-addass 7597 ax-mulass 7598 ax-distr 7599 ax-i2m1 7600 ax-0lt1 7601 ax-1rid 7602 ax-0id 7603 ax-rnegex 7604 ax-precex 7605 ax-cnre 7606 ax-pre-ltirr 7607 ax-pre-lttrn 7609 ax-pre-apti 7610 ax-pre-ltadd 7611 ax-pre-mulgt0 7612 |
This theorem depends on definitions: df-bi 116 df-3an 932 df-tru 1302 df-fal 1305 df-nf 1405 df-sb 1704 df-eu 1963 df-mo 1964 df-clab 2087 df-cleq 2093 df-clel 2096 df-nfc 2229 df-ne 2268 df-nel 2363 df-ral 2380 df-rex 2381 df-reu 2382 df-rmo 2383 df-rab 2384 df-v 2643 df-sbc 2863 df-dif 3023 df-un 3025 df-in 3027 df-ss 3034 df-pw 3459 df-sn 3480 df-pr 3481 df-op 3483 df-uni 3684 df-br 3876 df-opab 3930 df-mpt 3931 df-id 4153 df-xp 4483 df-rel 4484 df-cnv 4485 df-co 4486 df-dm 4487 df-iota 5024 df-fun 5061 df-fv 5067 df-riota 5662 df-ov 5709 df-oprab 5710 df-mpo 5711 df-pnf 7674 df-mnf 7675 df-ltxr 7677 df-sub 7806 df-neg 7807 df-reap 8203 df-cj 10455 |
This theorem is referenced by: recl 10466 crre 10470 |
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