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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 · (ℑ ‘A)))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fveq2 3715 | . . 3 ⊢ (x = A → (ℜ ‘x) = (ℜ ‘A)) | |
| 2 | fveq2 3715 | . . . 4 ⊢ (x = A → (ℑ ‘x) = (ℑ ‘A)) | |
| 3 | 2 | opreq2d 3967 | . . 3 ⊢ (x = A → (i · (ℑ ‘x)) = (i · (ℑ ‘A))) |
| 4 | 1, 3 | opreq12d 3969 | . 2 ⊢ (x = A → ((ℜ ‘x) − (i · (ℑ ‘x))) = ((ℜ ‘A) − (i · (ℑ ‘A)))) |
| 5 | df-cj 6692 | . 2 ⊢ ∗ = {〈x, y〉∣(x ∈ ℂ ⋀ y = ((ℜ ‘x) − (i · (ℑ ‘x))))} | |
| 6 | oprex 3974 | . 2 ⊢ ((ℜ ‘A) − (i · (ℑ ‘A))) ∈ V | |
| 7 | 4, 5, 6 | fvopab4 3771 | 1 ⊢ (A ∈ ℂ → (∗ ‘A) = ((ℜ ‘A) − (i · (ℑ ‘A)))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 = wceq 954 ∈ wcel 956 ‘cfv 3177 (class class class)co 3954 ℂcc 5212 ici 5216 · cmul 5219 − cmin 5272 ℜcre 6686 ℑcim 6687 ∗ccj 6688 |
| This theorem is referenced by: cjclt 6704 cjcj 6721 cjreb 6724 recj 6725 imcj 6726 cjadd 6731 cjmul 6732 cjneg 6740 addcj 6741 recjt 6761 imcjt 6762 cji 6770 cj11t 6773 cjcncf 7221 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 960 ax-gen 961 ax-8 962 ax-9 963 ax-10 964 ax-11 965 ax-12 966 ax-13 967 ax-14 968 ax-17 969 ax-4 971 ax-5o 973 ax-6o 976 ax-9o 1121 ax-10o 1138 ax-16 1208 ax-11o 1216 ax-ext 1457 ax-sep 2698 ax-pow 2737 ax-pr 2774 ax-un 2861 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 979 df-sb 1170 df-eu 1380 df-mo 1381 df-clab 1462 df-cleq 1467 df-clel 1470 df-ne 1584 df-rex 1647 df-v 1808 df-dif 2045 df-un 2046 df-in 2047 df-ss 2049 df-nul 2277 df-pw 2398 df-sn 2408 df-pr 2409 df-op 2412 df-uni 2499 df-br 2615 df-opab 2662 df-id 2830 df-xp 3179 df-rel 3180 df-cnv 3181 df-co 3182 df-dm 3183 df-rn 3184 df-res 3185 df-ima 3186 df-fun 3187 df-fv 3193 df-opr 3956 df-cj 6692 |