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Mirrors > Home > MPE Home > Th. List > argimlt0 | Structured version Visualization version GIF version |
Description: Closure of the argument of a complex number with negative imaginary part. (Contributed by Mario Carneiro, 25-Feb-2015.) |
Ref | Expression |
---|---|
argimlt0 | ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (ℑ‘(log‘𝐴)) ∈ (-π(,)0)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpr 488 | . . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (ℑ‘𝐴) < 0) | |
2 | 1 | lt0ne0d 11397 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (ℑ‘𝐴) ≠ 0) |
3 | fveq2 6717 | . . . . . . 7 ⊢ (𝐴 = 0 → (ℑ‘𝐴) = (ℑ‘0)) | |
4 | im0 14716 | . . . . . . 7 ⊢ (ℑ‘0) = 0 | |
5 | 3, 4 | eqtrdi 2794 | . . . . . 6 ⊢ (𝐴 = 0 → (ℑ‘𝐴) = 0) |
6 | 5 | necon3i 2973 | . . . . 5 ⊢ ((ℑ‘𝐴) ≠ 0 → 𝐴 ≠ 0) |
7 | 2, 6 | syl 17 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → 𝐴 ≠ 0) |
8 | logcl 25457 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ≠ 0) → (log‘𝐴) ∈ ℂ) | |
9 | 7, 8 | syldan 594 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (log‘𝐴) ∈ ℂ) |
10 | 9 | imcld 14758 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (ℑ‘(log‘𝐴)) ∈ ℝ) |
11 | logcj 25494 | . . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) ≠ 0) → (log‘(∗‘𝐴)) = (∗‘(log‘𝐴))) | |
12 | 2, 11 | syldan 594 | . . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (log‘(∗‘𝐴)) = (∗‘(log‘𝐴))) |
13 | 12 | fveq2d 6721 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (ℑ‘(log‘(∗‘𝐴))) = (ℑ‘(∗‘(log‘𝐴)))) |
14 | 9 | imcjd 14768 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (ℑ‘(∗‘(log‘𝐴))) = -(ℑ‘(log‘𝐴))) |
15 | 13, 14 | eqtrd 2777 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (ℑ‘(log‘(∗‘𝐴))) = -(ℑ‘(log‘𝐴))) |
16 | cjcl 14668 | . . . . . . 7 ⊢ (𝐴 ∈ ℂ → (∗‘𝐴) ∈ ℂ) | |
17 | imcl 14674 | . . . . . . . . . . 11 ⊢ (𝐴 ∈ ℂ → (ℑ‘𝐴) ∈ ℝ) | |
18 | 17 | adantr 484 | . . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (ℑ‘𝐴) ∈ ℝ) |
19 | 18 | lt0neg1d 11401 | . . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → ((ℑ‘𝐴) < 0 ↔ 0 < -(ℑ‘𝐴))) |
20 | 1, 19 | mpbid 235 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → 0 < -(ℑ‘𝐴)) |
21 | imcj 14695 | . . . . . . . . 9 ⊢ (𝐴 ∈ ℂ → (ℑ‘(∗‘𝐴)) = -(ℑ‘𝐴)) | |
22 | 21 | adantr 484 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (ℑ‘(∗‘𝐴)) = -(ℑ‘𝐴)) |
23 | 20, 22 | breqtrrd 5081 | . . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → 0 < (ℑ‘(∗‘𝐴))) |
24 | argimgt0 25500 | . . . . . . 7 ⊢ (((∗‘𝐴) ∈ ℂ ∧ 0 < (ℑ‘(∗‘𝐴))) → (ℑ‘(log‘(∗‘𝐴))) ∈ (0(,)π)) | |
25 | 16, 23, 24 | syl2an2r 685 | . . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (ℑ‘(log‘(∗‘𝐴))) ∈ (0(,)π)) |
26 | eliooord 12994 | . . . . . 6 ⊢ ((ℑ‘(log‘(∗‘𝐴))) ∈ (0(,)π) → (0 < (ℑ‘(log‘(∗‘𝐴))) ∧ (ℑ‘(log‘(∗‘𝐴))) < π)) | |
27 | 25, 26 | syl 17 | . . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (0 < (ℑ‘(log‘(∗‘𝐴))) ∧ (ℑ‘(log‘(∗‘𝐴))) < π)) |
28 | 27 | simprd 499 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (ℑ‘(log‘(∗‘𝐴))) < π) |
29 | 15, 28 | eqbrtrrd 5077 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → -(ℑ‘(log‘𝐴)) < π) |
30 | pire 25348 | . . . 4 ⊢ π ∈ ℝ | |
31 | ltnegcon1 11333 | . . . 4 ⊢ (((ℑ‘(log‘𝐴)) ∈ ℝ ∧ π ∈ ℝ) → (-(ℑ‘(log‘𝐴)) < π ↔ -π < (ℑ‘(log‘𝐴)))) | |
32 | 10, 30, 31 | sylancl 589 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (-(ℑ‘(log‘𝐴)) < π ↔ -π < (ℑ‘(log‘𝐴)))) |
33 | 29, 32 | mpbid 235 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → -π < (ℑ‘(log‘𝐴))) |
34 | 27 | simpld 498 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → 0 < (ℑ‘(log‘(∗‘𝐴)))) |
35 | 34, 15 | breqtrd 5079 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → 0 < -(ℑ‘(log‘𝐴))) |
36 | 10 | lt0neg1d 11401 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → ((ℑ‘(log‘𝐴)) < 0 ↔ 0 < -(ℑ‘(log‘𝐴)))) |
37 | 35, 36 | mpbird 260 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (ℑ‘(log‘𝐴)) < 0) |
38 | 30 | renegcli 11139 | . . . 4 ⊢ -π ∈ ℝ |
39 | 38 | rexri 10891 | . . 3 ⊢ -π ∈ ℝ* |
40 | 0xr 10880 | . . 3 ⊢ 0 ∈ ℝ* | |
41 | elioo2 12976 | . . 3 ⊢ ((-π ∈ ℝ* ∧ 0 ∈ ℝ*) → ((ℑ‘(log‘𝐴)) ∈ (-π(,)0) ↔ ((ℑ‘(log‘𝐴)) ∈ ℝ ∧ -π < (ℑ‘(log‘𝐴)) ∧ (ℑ‘(log‘𝐴)) < 0))) | |
42 | 39, 40, 41 | mp2an 692 | . 2 ⊢ ((ℑ‘(log‘𝐴)) ∈ (-π(,)0) ↔ ((ℑ‘(log‘𝐴)) ∈ ℝ ∧ -π < (ℑ‘(log‘𝐴)) ∧ (ℑ‘(log‘𝐴)) < 0)) |
43 | 10, 33, 37, 42 | syl3anbrc 1345 | 1 ⊢ ((𝐴 ∈ ℂ ∧ (ℑ‘𝐴) < 0) → (ℑ‘(log‘𝐴)) ∈ (-π(,)0)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 ∧ w3a 1089 = wceq 1543 ∈ wcel 2110 ≠ wne 2940 class class class wbr 5053 ‘cfv 6380 (class class class)co 7213 ℂcc 10727 ℝcr 10728 0cc0 10729 ℝ*cxr 10866 < clt 10867 -cneg 11063 (,)cioo 12935 ∗ccj 14659 ℑcim 14661 πcpi 15628 logclog 25443 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2708 ax-rep 5179 ax-sep 5192 ax-nul 5199 ax-pow 5258 ax-pr 5322 ax-un 7523 ax-inf2 9256 ax-cnex 10785 ax-resscn 10786 ax-1cn 10787 ax-icn 10788 ax-addcl 10789 ax-addrcl 10790 ax-mulcl 10791 ax-mulrcl 10792 ax-mulcom 10793 ax-addass 10794 ax-mulass 10795 ax-distr 10796 ax-i2m1 10797 ax-1ne0 10798 ax-1rid 10799 ax-rnegex 10800 ax-rrecex 10801 ax-cnre 10802 ax-pre-lttri 10803 ax-pre-lttrn 10804 ax-pre-ltadd 10805 ax-pre-mulgt0 10806 ax-pre-sup 10807 ax-addf 10808 ax-mulf 10809 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2071 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3066 df-rex 3067 df-reu 3068 df-rmo 3069 df-rab 3070 df-v 3410 df-sbc 3695 df-csb 3812 df-dif 3869 df-un 3871 df-in 3873 df-ss 3883 df-pss 3885 df-nul 4238 df-if 4440 df-pw 4515 df-sn 4542 df-pr 4544 df-tp 4546 df-op 4548 df-uni 4820 df-int 4860 df-iun 4906 df-iin 4907 df-br 5054 df-opab 5116 df-mpt 5136 df-tr 5162 df-id 5455 df-eprel 5460 df-po 5468 df-so 5469 df-fr 5509 df-se 5510 df-we 5511 df-xp 5557 df-rel 5558 df-cnv 5559 df-co 5560 df-dm 5561 df-rn 5562 df-res 5563 df-ima 5564 df-pred 6160 df-ord 6216 df-on 6217 df-lim 6218 df-suc 6219 df-iota 6338 df-fun 6382 df-fn 6383 df-f 6384 df-f1 6385 df-fo 6386 df-f1o 6387 df-fv 6388 df-isom 6389 df-riota 7170 df-ov 7216 df-oprab 7217 df-mpo 7218 df-of 7469 df-om 7645 df-1st 7761 df-2nd 7762 df-supp 7904 df-wrecs 8047 df-recs 8108 df-rdg 8146 df-1o 8202 df-2o 8203 df-er 8391 df-map 8510 df-pm 8511 df-ixp 8579 df-en 8627 df-dom 8628 df-sdom 8629 df-fin 8630 df-fsupp 8986 df-fi 9027 df-sup 9058 df-inf 9059 df-oi 9126 df-card 9555 df-pnf 10869 df-mnf 10870 df-xr 10871 df-ltxr 10872 df-le 10873 df-sub 11064 df-neg 11065 df-div 11490 df-nn 11831 df-2 11893 df-3 11894 df-4 11895 df-5 11896 df-6 11897 df-7 11898 df-8 11899 df-9 11900 df-n0 12091 df-z 12177 df-dec 12294 df-uz 12439 df-q 12545 df-rp 12587 df-xneg 12704 df-xadd 12705 df-xmul 12706 df-ioo 12939 df-ioc 12940 df-ico 12941 df-icc 12942 df-fz 13096 df-fzo 13239 df-fl 13367 df-mod 13443 df-seq 13575 df-exp 13636 df-fac 13840 df-bc 13869 df-hash 13897 df-shft 14630 df-cj 14662 df-re 14663 df-im 14664 df-sqrt 14798 df-abs 14799 df-limsup 15032 df-clim 15049 df-rlim 15050 df-sum 15250 df-ef 15629 df-sin 15631 df-cos 15632 df-pi 15634 df-struct 16700 df-sets 16717 df-slot 16735 df-ndx 16745 df-base 16761 df-ress 16785 df-plusg 16815 df-mulr 16816 df-starv 16817 df-sca 16818 df-vsca 16819 df-ip 16820 df-tset 16821 df-ple 16822 df-ds 16824 df-unif 16825 df-hom 16826 df-cco 16827 df-rest 16927 df-topn 16928 df-0g 16946 df-gsum 16947 df-topgen 16948 df-pt 16949 df-prds 16952 df-xrs 17007 df-qtop 17012 df-imas 17013 df-xps 17015 df-mre 17089 df-mrc 17090 df-acs 17092 df-mgm 18114 df-sgrp 18163 df-mnd 18174 df-submnd 18219 df-mulg 18489 df-cntz 18711 df-cmn 19172 df-psmet 20355 df-xmet 20356 df-met 20357 df-bl 20358 df-mopn 20359 df-fbas 20360 df-fg 20361 df-cnfld 20364 df-top 21791 df-topon 21808 df-topsp 21830 df-bases 21843 df-cld 21916 df-ntr 21917 df-cls 21918 df-nei 21995 df-lp 22033 df-perf 22034 df-cn 22124 df-cnp 22125 df-haus 22212 df-tx 22459 df-hmeo 22652 df-fil 22743 df-fm 22835 df-flim 22836 df-flf 22837 df-xms 23218 df-ms 23219 df-tms 23220 df-cncf 23775 df-limc 24763 df-dv 24764 df-log 25445 |
This theorem is referenced by: logcnlem3 25532 atanlogaddlem 25796 |
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