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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 8980 | . . . 4 ⊢ (𝐴 ∈ ℂ → ∃!𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ)) | |
2 | riotasbc 5889 | . . . 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 10989 | . . . 4 ⊢ (𝐴 ∈ ℂ → (∗‘𝐴) = (℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ))) | |
5 | 4 | sbceq1d 2990 | . . 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 167 | . 2 ⊢ (𝐴 ∈ ℂ → [(∗‘𝐴) / 𝑥]((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ)) |
7 | riotacl 5888 | . . . . 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 2270 | . . 3 ⊢ (𝐴 ∈ ℂ → (∗‘𝐴) ∈ ℂ) |
10 | oveq2 5926 | . . . . . 6 ⊢ (𝑥 = (∗‘𝐴) → (𝐴 + 𝑥) = (𝐴 + (∗‘𝐴))) | |
11 | 10 | eleq1d 2262 | . . . . 5 ⊢ (𝑥 = (∗‘𝐴) → ((𝐴 + 𝑥) ∈ ℝ ↔ (𝐴 + (∗‘𝐴)) ∈ ℝ)) |
12 | oveq2 5926 | . . . . . . 7 ⊢ (𝑥 = (∗‘𝐴) → (𝐴 − 𝑥) = (𝐴 − (∗‘𝐴))) | |
13 | 12 | oveq2d 5934 | . . . . . 6 ⊢ (𝑥 = (∗‘𝐴) → (i · (𝐴 − 𝑥)) = (i · (𝐴 − (∗‘𝐴)))) |
14 | 13 | eleq1d 2262 | . . . . 5 ⊢ (𝑥 = (∗‘𝐴) → ((i · (𝐴 − 𝑥)) ∈ ℝ ↔ (i · (𝐴 − (∗‘𝐴))) ∈ ℝ)) |
15 | 11, 14 | anbi12d 473 | . . . 4 ⊢ (𝑥 = (∗‘𝐴) → (((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ) ↔ ((𝐴 + (∗‘𝐴)) ∈ ℝ ∧ (i · (𝐴 − (∗‘𝐴))) ∈ ℝ))) |
16 | 15 | sbcieg 3018 | . . 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 147 | 1 ⊢ (𝐴 ∈ ℂ → ((𝐴 + (∗‘𝐴)) ∈ ℝ ∧ (i · (𝐴 − (∗‘𝐴))) ∈ ℝ)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1364 ∈ wcel 2164 ∃!wreu 2474 [wsbc 2985 ‘cfv 5254 ℩crio 5872 (class class class)co 5918 ℂcc 7870 ℝcr 7871 ici 7874 + caddc 7875 · cmul 7877 − cmin 8190 ∗ccj 10983 |
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 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2166 ax-14 2167 ax-ext 2175 ax-sep 4147 ax-pow 4203 ax-pr 4238 ax-un 4464 ax-setind 4569 ax-cnex 7963 ax-resscn 7964 ax-1cn 7965 ax-1re 7966 ax-icn 7967 ax-addcl 7968 ax-addrcl 7969 ax-mulcl 7970 ax-mulrcl 7971 ax-addcom 7972 ax-mulcom 7973 ax-addass 7974 ax-mulass 7975 ax-distr 7976 ax-i2m1 7977 ax-0lt1 7978 ax-1rid 7979 ax-0id 7980 ax-rnegex 7981 ax-precex 7982 ax-cnre 7983 ax-pre-ltirr 7984 ax-pre-lttrn 7986 ax-pre-apti 7987 ax-pre-ltadd 7988 ax-pre-mulgt0 7989 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2045 df-mo 2046 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ne 2365 df-nel 2460 df-ral 2477 df-rex 2478 df-reu 2479 df-rmo 2480 df-rab 2481 df-v 2762 df-sbc 2986 df-dif 3155 df-un 3157 df-in 3159 df-ss 3166 df-pw 3603 df-sn 3624 df-pr 3625 df-op 3627 df-uni 3836 df-br 4030 df-opab 4091 df-mpt 4092 df-id 4324 df-xp 4665 df-rel 4666 df-cnv 4667 df-co 4668 df-dm 4669 df-iota 5215 df-fun 5256 df-fv 5262 df-riota 5873 df-ov 5921 df-oprab 5922 df-mpo 5923 df-pnf 8056 df-mnf 8057 df-ltxr 8059 df-sub 8192 df-neg 8193 df-reap 8594 df-cj 10986 |
This theorem is referenced by: recl 10997 crre 11001 |
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