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Mirrors > Home > MPE Home > Th. List > cjval | Structured version Visualization version GIF version |
Description: The value of the conjugate of a complex number. (Contributed by Mario Carneiro, 6-Nov-2013.) |
Ref | Expression |
---|---|
cjval | ⊢ (𝐴 ∈ ℂ → (∗‘𝐴) = (℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oveq1 7282 | . . . . 5 ⊢ (𝑦 = 𝐴 → (𝑦 + 𝑥) = (𝐴 + 𝑥)) | |
2 | 1 | eleq1d 2823 | . . . 4 ⊢ (𝑦 = 𝐴 → ((𝑦 + 𝑥) ∈ ℝ ↔ (𝐴 + 𝑥) ∈ ℝ)) |
3 | oveq1 7282 | . . . . . 6 ⊢ (𝑦 = 𝐴 → (𝑦 − 𝑥) = (𝐴 − 𝑥)) | |
4 | 3 | oveq2d 7291 | . . . . 5 ⊢ (𝑦 = 𝐴 → (i · (𝑦 − 𝑥)) = (i · (𝐴 − 𝑥))) |
5 | 4 | eleq1d 2823 | . . . 4 ⊢ (𝑦 = 𝐴 → ((i · (𝑦 − 𝑥)) ∈ ℝ ↔ (i · (𝐴 − 𝑥)) ∈ ℝ)) |
6 | 2, 5 | anbi12d 631 | . . 3 ⊢ (𝑦 = 𝐴 → (((𝑦 + 𝑥) ∈ ℝ ∧ (i · (𝑦 − 𝑥)) ∈ ℝ) ↔ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ))) |
7 | 6 | riotabidv 7234 | . 2 ⊢ (𝑦 = 𝐴 → (℩𝑥 ∈ ℂ ((𝑦 + 𝑥) ∈ ℝ ∧ (i · (𝑦 − 𝑥)) ∈ ℝ)) = (℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ))) |
8 | df-cj 14810 | . 2 ⊢ ∗ = (𝑦 ∈ ℂ ↦ (℩𝑥 ∈ ℂ ((𝑦 + 𝑥) ∈ ℝ ∧ (i · (𝑦 − 𝑥)) ∈ ℝ))) | |
9 | riotaex 7236 | . 2 ⊢ (℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ)) ∈ V | |
10 | 7, 8, 9 | fvmpt 6875 | 1 ⊢ (𝐴 ∈ ℂ → (∗‘𝐴) = (℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ‘cfv 6433 ℩crio 7231 (class class class)co 7275 ℂcc 10869 ℝcr 10870 ici 10873 + caddc 10874 · cmul 10876 − cmin 11205 ∗ccj 14807 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pr 5352 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ral 3069 df-rex 3070 df-rab 3073 df-v 3434 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-nul 4257 df-if 4460 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-br 5075 df-opab 5137 df-mpt 5158 df-id 5489 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-iota 6391 df-fun 6435 df-fv 6441 df-riota 7232 df-ov 7278 df-cj 14810 |
This theorem is referenced by: cjth 14814 remim 14828 |
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