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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 7166 | . . . . 5 ⊢ (𝑦 = 𝐴 → (𝑦 + 𝑥) = (𝐴 + 𝑥)) | |
2 | 1 | eleq1d 2900 | . . . 4 ⊢ (𝑦 = 𝐴 → ((𝑦 + 𝑥) ∈ ℝ ↔ (𝐴 + 𝑥) ∈ ℝ)) |
3 | oveq1 7166 | . . . . . 6 ⊢ (𝑦 = 𝐴 → (𝑦 − 𝑥) = (𝐴 − 𝑥)) | |
4 | 3 | oveq2d 7175 | . . . . 5 ⊢ (𝑦 = 𝐴 → (i · (𝑦 − 𝑥)) = (i · (𝐴 − 𝑥))) |
5 | 4 | eleq1d 2900 | . . . 4 ⊢ (𝑦 = 𝐴 → ((i · (𝑦 − 𝑥)) ∈ ℝ ↔ (i · (𝐴 − 𝑥)) ∈ ℝ)) |
6 | 2, 5 | anbi12d 632 | . . 3 ⊢ (𝑦 = 𝐴 → (((𝑦 + 𝑥) ∈ ℝ ∧ (i · (𝑦 − 𝑥)) ∈ ℝ) ↔ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ))) |
7 | 6 | riotabidv 7119 | . 2 ⊢ (𝑦 = 𝐴 → (℩𝑥 ∈ ℂ ((𝑦 + 𝑥) ∈ ℝ ∧ (i · (𝑦 − 𝑥)) ∈ ℝ)) = (℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ))) |
8 | df-cj 14461 | . 2 ⊢ ∗ = (𝑦 ∈ ℂ ↦ (℩𝑥 ∈ ℂ ((𝑦 + 𝑥) ∈ ℝ ∧ (i · (𝑦 − 𝑥)) ∈ ℝ))) | |
9 | riotaex 7121 | . 2 ⊢ (℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ)) ∈ V | |
10 | 7, 8, 9 | fvmpt 6771 | 1 ⊢ (𝐴 ∈ ℂ → (∗‘𝐴) = (℩𝑥 ∈ ℂ ((𝐴 + 𝑥) ∈ ℝ ∧ (i · (𝐴 − 𝑥)) ∈ ℝ))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1536 ∈ wcel 2113 ‘cfv 6358 ℩crio 7116 (class class class)co 7159 ℂcc 10538 ℝcr 10539 ici 10542 + caddc 10543 · cmul 10545 − cmin 10873 ∗ccj 14458 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2796 ax-sep 5206 ax-nul 5213 ax-pr 5333 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1539 df-ex 1780 df-nf 1784 df-sb 2069 df-mo 2621 df-eu 2653 df-clab 2803 df-cleq 2817 df-clel 2896 df-nfc 2966 df-ral 3146 df-rex 3147 df-rab 3150 df-v 3499 df-sbc 3776 df-dif 3942 df-un 3944 df-in 3946 df-ss 3955 df-nul 4295 df-if 4471 df-sn 4571 df-pr 4573 df-op 4577 df-uni 4842 df-br 5070 df-opab 5132 df-mpt 5150 df-id 5463 df-xp 5564 df-rel 5565 df-cnv 5566 df-co 5567 df-dm 5568 df-iota 6317 df-fun 6360 df-fv 6366 df-riota 7117 df-ov 7162 df-cj 14461 |
This theorem is referenced by: cjth 14465 remim 14479 |
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