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Mirrors > Home > MPE Home > Th. List > cjreim | Structured version Visualization version GIF version |
Description: The conjugate of a representation of a complex number in terms of real and imaginary parts. (Contributed by NM, 1-Jul-2005.) |
Ref | Expression |
---|---|
cjreim | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (∗‘(𝐴 + (i · 𝐵))) = (𝐴 − (i · 𝐵))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | recn 11040 | . . 3 ⊢ (𝐴 ∈ ℝ → 𝐴 ∈ ℂ) | |
2 | ax-icn 11009 | . . . 4 ⊢ i ∈ ℂ | |
3 | recn 11040 | . . . 4 ⊢ (𝐵 ∈ ℝ → 𝐵 ∈ ℂ) | |
4 | mulcl 11034 | . . . 4 ⊢ ((i ∈ ℂ ∧ 𝐵 ∈ ℂ) → (i · 𝐵) ∈ ℂ) | |
5 | 2, 3, 4 | sylancr 587 | . . 3 ⊢ (𝐵 ∈ ℝ → (i · 𝐵) ∈ ℂ) |
6 | cjadd 14928 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ (i · 𝐵) ∈ ℂ) → (∗‘(𝐴 + (i · 𝐵))) = ((∗‘𝐴) + (∗‘(i · 𝐵)))) | |
7 | 1, 5, 6 | syl2an 596 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (∗‘(𝐴 + (i · 𝐵))) = ((∗‘𝐴) + (∗‘(i · 𝐵)))) |
8 | cjre 14926 | . . 3 ⊢ (𝐴 ∈ ℝ → (∗‘𝐴) = 𝐴) | |
9 | cjmul 14929 | . . . . 5 ⊢ ((i ∈ ℂ ∧ 𝐵 ∈ ℂ) → (∗‘(i · 𝐵)) = ((∗‘i) · (∗‘𝐵))) | |
10 | 2, 3, 9 | sylancr 587 | . . . 4 ⊢ (𝐵 ∈ ℝ → (∗‘(i · 𝐵)) = ((∗‘i) · (∗‘𝐵))) |
11 | cji 14946 | . . . . . 6 ⊢ (∗‘i) = -i | |
12 | 11 | a1i 11 | . . . . 5 ⊢ (𝐵 ∈ ℝ → (∗‘i) = -i) |
13 | cjre 14926 | . . . . 5 ⊢ (𝐵 ∈ ℝ → (∗‘𝐵) = 𝐵) | |
14 | 12, 13 | oveq12d 7334 | . . . 4 ⊢ (𝐵 ∈ ℝ → ((∗‘i) · (∗‘𝐵)) = (-i · 𝐵)) |
15 | mulneg1 11490 | . . . . 5 ⊢ ((i ∈ ℂ ∧ 𝐵 ∈ ℂ) → (-i · 𝐵) = -(i · 𝐵)) | |
16 | 2, 3, 15 | sylancr 587 | . . . 4 ⊢ (𝐵 ∈ ℝ → (-i · 𝐵) = -(i · 𝐵)) |
17 | 10, 14, 16 | 3eqtrd 2780 | . . 3 ⊢ (𝐵 ∈ ℝ → (∗‘(i · 𝐵)) = -(i · 𝐵)) |
18 | 8, 17 | oveqan12d 7335 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((∗‘𝐴) + (∗‘(i · 𝐵))) = (𝐴 + -(i · 𝐵))) |
19 | negsub 11348 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ (i · 𝐵) ∈ ℂ) → (𝐴 + -(i · 𝐵)) = (𝐴 − (i · 𝐵))) | |
20 | 1, 5, 19 | syl2an 596 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴 + -(i · 𝐵)) = (𝐴 − (i · 𝐵))) |
21 | 7, 18, 20 | 3eqtrd 2780 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (∗‘(𝐴 + (i · 𝐵))) = (𝐴 − (i · 𝐵))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1540 ∈ wcel 2105 ‘cfv 6465 (class class class)co 7316 ℂcc 10948 ℝcr 10949 ici 10952 + caddc 10953 · cmul 10955 − cmin 11284 -cneg 11285 ∗ccj 14883 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2707 ax-sep 5237 ax-nul 5244 ax-pow 5302 ax-pr 5366 ax-un 7629 ax-resscn 11007 ax-1cn 11008 ax-icn 11009 ax-addcl 11010 ax-addrcl 11011 ax-mulcl 11012 ax-mulrcl 11013 ax-mulcom 11014 ax-addass 11015 ax-mulass 11016 ax-distr 11017 ax-i2m1 11018 ax-1ne0 11019 ax-1rid 11020 ax-rnegex 11021 ax-rrecex 11022 ax-cnre 11023 ax-pre-lttri 11024 ax-pre-lttrn 11025 ax-pre-ltadd 11026 ax-pre-mulgt0 11027 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3349 df-reu 3350 df-rab 3404 df-v 3442 df-sbc 3726 df-csb 3842 df-dif 3899 df-un 3901 df-in 3903 df-ss 3913 df-nul 4267 df-if 4471 df-pw 4546 df-sn 4571 df-pr 4573 df-op 4577 df-uni 4850 df-br 5087 df-opab 5149 df-mpt 5170 df-id 5506 df-po 5520 df-so 5521 df-xp 5613 df-rel 5614 df-cnv 5615 df-co 5616 df-dm 5617 df-rn 5618 df-res 5619 df-ima 5620 df-iota 6417 df-fun 6467 df-fn 6468 df-f 6469 df-f1 6470 df-fo 6471 df-f1o 6472 df-fv 6473 df-riota 7273 df-ov 7319 df-oprab 7320 df-mpo 7321 df-er 8547 df-en 8783 df-dom 8784 df-sdom 8785 df-pnf 11090 df-mnf 11091 df-xr 11092 df-ltxr 11093 df-le 11094 df-sub 11286 df-neg 11287 df-div 11712 df-2 12115 df-cj 14886 df-re 14887 df-im 14888 |
This theorem is referenced by: cjreim2 14948 dipcj 29208 lnophmlem2 30511 |
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