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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 7360 | . . . . 5 ⊢ (𝑦 = 𝐴 → (𝑦 + 𝑥) = (𝐴 + 𝑥)) | |
2 | 1 | eleq1d 2822 | . . . 4 ⊢ (𝑦 = 𝐴 → ((𝑦 + 𝑥) ∈ ℝ ↔ (𝐴 + 𝑥) ∈ ℝ)) |
3 | oveq1 7360 | . . . . . 6 ⊢ (𝑦 = 𝐴 → (𝑦 − 𝑥) = (𝐴 − 𝑥)) | |
4 | 3 | oveq2d 7369 | . . . . 5 ⊢ (𝑦 = 𝐴 → (i · (𝑦 − 𝑥)) = (i · (𝐴 − 𝑥))) |
5 | 4 | eleq1d 2822 | . . . 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 7311 | . 2 ⊢ (𝑦 = 𝐴 → (℩𝑥 ∈ ℂ ((𝑦 + 𝑥) ∈ ℝ ∧ (i · (𝑦 − 𝑥)) ∈ ℝ)) = (℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ))) |
8 | df-cj 14976 | . 2 ⊢ ∗ = (𝑦 ∈ ℂ ↦ (℩𝑥 ∈ ℂ ((𝑦 + 𝑥) ∈ ℝ ∧ (i · (𝑦 − 𝑥)) ∈ ℝ))) | |
9 | riotaex 7313 | . 2 ⊢ (℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ)) ∈ V | |
10 | 7, 8, 9 | fvmpt 6945 | 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 1541 ∈ wcel 2106 ‘cfv 6493 ℩crio 7308 (class class class)co 7353 ℂcc 11045 ℝcr 11046 ici 11049 + caddc 11050 · cmul 11052 − cmin 11381 ∗ccj 14973 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 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 2707 ax-sep 5254 ax-nul 5261 ax-pr 5382 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ne 2942 df-ral 3063 df-rex 3072 df-rab 3406 df-v 3445 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4281 df-if 4485 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4864 df-br 5104 df-opab 5166 df-mpt 5187 df-id 5529 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-iota 6445 df-fun 6495 df-fv 6501 df-riota 7309 df-ov 7356 df-cj 14976 |
This theorem is referenced by: cjth 14980 remim 14994 |
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