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Mirrors > Home > MPE Home > Th. List > imcl | Structured version Visualization version GIF version |
Description: The imaginary part of a complex number is real. (Contributed by NM, 9-May-1999.) (Revised by Mario Carneiro, 6-Nov-2013.) |
Ref | Expression |
---|---|
imcl | ⊢ (𝐴 ∈ ℂ → (ℑ‘𝐴) ∈ ℝ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | imre 14747 | . 2 ⊢ (𝐴 ∈ ℂ → (ℑ‘𝐴) = (ℜ‘(-i · 𝐴))) | |
2 | negicn 11152 | . . . 4 ⊢ -i ∈ ℂ | |
3 | mulcl 10886 | . . . 4 ⊢ ((-i ∈ ℂ ∧ 𝐴 ∈ ℂ) → (-i · 𝐴) ∈ ℂ) | |
4 | 2, 3 | mpan 686 | . . 3 ⊢ (𝐴 ∈ ℂ → (-i · 𝐴) ∈ ℂ) |
5 | recl 14749 | . . 3 ⊢ ((-i · 𝐴) ∈ ℂ → (ℜ‘(-i · 𝐴)) ∈ ℝ) | |
6 | 4, 5 | syl 17 | . 2 ⊢ (𝐴 ∈ ℂ → (ℜ‘(-i · 𝐴)) ∈ ℝ) |
7 | 1, 6 | eqeltrd 2839 | 1 ⊢ (𝐴 ∈ ℂ → (ℑ‘𝐴) ∈ ℝ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2108 ‘cfv 6418 (class class class)co 7255 ℂcc 10800 ℝcr 10801 ici 10804 · cmul 10807 -cneg 11136 ℜcre 14736 ℑcim 14737 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-br 5071 df-opab 5133 df-mpt 5154 df-id 5480 df-po 5494 df-so 5495 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-2 11966 df-cj 14738 df-re 14739 df-im 14740 |
This theorem is referenced by: imf 14752 remim 14756 mulre 14760 cjreb 14762 recj 14763 reneg 14764 readd 14765 remullem 14767 remul2 14769 imcj 14771 imneg 14772 imadd 14773 imsub 14774 immul2 14776 imdiv 14777 cjcj 14779 cjadd 14780 ipcnval 14782 cjmulval 14784 cjmulge0 14785 cjneg 14786 imval2 14790 cnrecnv 14804 imcli 14807 imcld 14834 absrele 14948 efeul 15799 absef 15834 absefib 15835 efieq1re 15836 cnsubrg 20570 mbfconst 24702 itgconst 24888 tanregt0 25600 ellogrn 25620 argimgt0 25672 argimlt0 25673 logneg2 25675 tanarg 25679 logf1o2 25710 logreclem 25817 asinlem3a 25925 asinlem3 25926 zetacvg 26069 ccfldextdgrr 31644 sqrtcval 41138 sigarls 44260 |
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