| Metamath Proof Explorer |
< Previous
Next >
Related theorems GIF version |
| Description: Value of the conjugate of a complex number. The value is the real part minus i times the imaginary part. Definition 10-3.2 of [Gleason] p. 132. |
| Ref | Expression |
|---|---|
| cjvalt | ⊢ (A ∈ ℂ → (∗ ‘A) = ((ℜ ‘A) − ((ℑ ‘A) · i))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fveq2 2832 | . . 3 ⊢ (x = A → (ℜ ‘x) = (ℜ ‘A)) | |
| 2 | fveq2 2832 | . . . 4 ⊢ (x = A → (ℑ ‘x) = (ℑ ‘A)) | |
| 3 | 2 | opreq1d 3012 | . . 3 ⊢ (x = A → ((ℑ ‘x) · i) = ((ℑ ‘A) · i)) |
| 4 | 1, 3 | opreq12d 3014 | . 2 ⊢ (x = A → ((ℜ ‘x) − ((ℑ ‘x) · i)) = ((ℜ ‘A) − ((ℑ ‘A) · i))) |
| 5 | df-cj 4792 | . 2 ⊢ ∗ = {〈x, y〉∣(x ∈ ℂ ∧ y = ((ℜ ‘x) − ((ℑ ‘x) · i)))} | |
| 6 | oprex 3018 | . 2 ⊢ ((ℜ ‘A) − ((ℑ ‘A) · i)) ∈ V | |
| 7 | 4, 5, 6 | fvopab4 2871 | 1 ⊢ (A ∈ ℂ → (∗ ‘A) = ((ℜ ‘A) − ((ℑ ‘A) · i))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 = wceq 1091 ∈ wcel 1092 ‘cfv 2422 (class class class)co 3001 ℂcc 4026 ici 4030 · cmulc 4032 − cmin 4089 ℜcre 4786 ℑcim 4787 ∗ccj 4788 |
| This theorem is referenced by: cjclt 4800 cjcj 4808 cjre 4811 recj 4812 imcj 4813 cjadd 4818 cjmul 4819 cjneg 4827 addcj 4828 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-un 1076 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-ex 679 df-sb 853 df-eu 1009 df-mo 1010 df-clab 1093 df-cleq 1097 df-clel 1099 df-rex 1206 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-uni 1920 df-br 2063 df-opab 2098 df-id 2125 df-xp 2424 df-rel 2425 df-cnv 2426 df-co 2427 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-fun 2432 df-fv 2438 df-opr 3003 df-cj 4792 |