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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 3709 | . . 3 ⊢ (x = A → (ℜ ‘x) = (ℜ ‘A)) | |
| 2 | fveq2 3709 | . . . 4 ⊢ (x = A → (ℑ ‘x) = (ℑ ‘A)) | |
| 3 | 2 | opreq2d 3961 | . . 3 ⊢ (x = A → (i · (ℑ ‘x)) = (i · (ℑ ‘A))) |
| 4 | 1, 3 | opreq12d 3963 | . 2 ⊢ (x = A → ((ℜ ‘x) − (i · (ℑ ‘x))) = ((ℜ ‘A) − (i · (ℑ ‘A)))) |
| 5 | df-cj 6684 | . 2 ⊢ ∗ = {〈x, y〉∣(x ∈ ℂ ⋀ y = ((ℜ ‘x) − (i · (ℑ ‘x))))} | |
| 6 | oprex 3968 | . 2 ⊢ ((ℜ ‘A) − (i · (ℑ ‘A))) ∈ V | |
| 7 | 4, 5, 6 | fvopab4 3765 | 1 ⊢ (A ∈ ℂ → (∗ ‘A) = ((ℜ ‘A) − (i · (ℑ ‘A)))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 = wceq 953 ∈ wcel 955 ‘cfv 3172 (class class class)co 3948 ℂcc 5204 ici 5208 · cmul 5211 − cmin 5264 ℜcre 6678 ℑcim 6679 ∗ccj 6680 |
| This theorem is referenced by: cjclt 6696 cjcj 6713 cjreb 6716 recj 6717 imcj 6718 cjadd 6723 cjmul 6724 cjneg 6732 addcj 6733 recjt 6753 imcjt 6754 cji 6762 cj11t 6765 cjcncf 7213 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 959 ax-gen 960 ax-8 961 ax-9 962 ax-10 963 ax-11 964 ax-12 965 ax-13 966 ax-14 967 ax-17 968 ax-4 970 ax-5o 972 ax-6o 975 ax-9o 1119 ax-10o 1136 ax-16 1206 ax-11o 1213 ax-ext 1452 ax-sep 2693 ax-pow 2732 ax-pr 2769 ax-un 2857 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 978 df-sb 1168 df-eu 1375 df-mo 1376 df-clab 1457 df-cleq 1462 df-clel 1465 df-ne 1579 df-rex 1642 df-v 1803 df-dif 2039 df-un 2040 df-in 2041 df-ss 2043 df-nul 2271 df-pw 2392 df-sn 2402 df-pr 2403 df-op 2406 df-uni 2494 df-br 2610 df-opab 2657 df-id 2824 df-xp 3174 df-rel 3175 df-cnv 3176 df-co 3177 df-dm 3178 df-rn 3179 df-res 3180 df-ima 3181 df-fun 3182 df-fv 3188 df-opr 3950 df-cj 6684 |