isosctrlem1 - Metamath Proof Explorer

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Theorem isosctrlem1 24548

Description: Lemma for isosctr 24551. (Contributed by Saveliy Skresanov, 30-Dec-2016.)

**Assertion**
Ref	Expression
isosctrlem1	⊢ ((𝐴 ∈ ℂ ∧ (abs‘𝐴) = 1 ∧ ¬ 1 = 𝐴) → (ℑ‘(log‘(1 − 𝐴))) ≠ π)

**Proof of Theorem isosctrlem1**
Step	Hyp	Ref	Expression
1		ax-1cn 9994	. . . . . . 7 ⊢ 1 ∈ ℂ
2		subcl 10280	. . . . . . 7 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (1 − 𝐴) ∈ ℂ)
3	1, 2	mpan 706	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (1 − 𝐴) ∈ ℂ)
4	3	adantr 481	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ ¬ 1 = 𝐴) → (1 − 𝐴) ∈ ℂ)
5		subeq0 10307	. . . . . . . . 9 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((1 − 𝐴) = 0 ↔ 1 = 𝐴))
6	5	notbid 308	. . . . . . . 8 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (¬ (1 − 𝐴) = 0 ↔ ¬ 1 = 𝐴))
7	1, 6	mpan 706	. . . . . . 7 ⊢ (𝐴 ∈ ℂ → (¬ (1 − 𝐴) = 0 ↔ ¬ 1 = 𝐴))
8	7	biimpar 502	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ ¬ 1 = 𝐴) → ¬ (1 − 𝐴) = 0)
9	8	neqned 2801	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ ¬ 1 = 𝐴) → (1 − 𝐴) ≠ 0)
10	4, 9	logcld 24317	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ ¬ 1 = 𝐴) → (log‘(1 − 𝐴)) ∈ ℂ)
11	10	imcld 13935	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ ¬ 1 = 𝐴) → (ℑ‘(log‘(1 − 𝐴))) ∈ ℝ)
12	11	3adant2 1080	. 2 ⊢ ((𝐴 ∈ ℂ ∧ (abs‘𝐴) = 1 ∧ ¬ 1 = 𝐴) → (ℑ‘(log‘(1 − 𝐴))) ∈ ℝ)
13	3	3ad2ant1 1082	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (abs‘𝐴) = 1 ∧ ¬ 1 = 𝐴) → (1 − 𝐴) ∈ ℂ)
14	9	3adant2 1080	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (abs‘𝐴) = 1 ∧ ¬ 1 = 𝐴) → (1 − 𝐴) ≠ 0)
15		releabs 14061	. . . . . . . . . 10 ⊢ (𝐴 ∈ ℂ → (ℜ‘𝐴) ≤ (abs‘𝐴))
16	15	adantr 481	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ (abs‘𝐴) = 1) → (ℜ‘𝐴) ≤ (abs‘𝐴))
17		breq2 4657	. . . . . . . . . 10 ⊢ ((abs‘𝐴) = 1 → ((ℜ‘𝐴) ≤ (abs‘𝐴) ↔ (ℜ‘𝐴) ≤ 1))
18	17	adantl 482	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ (abs‘𝐴) = 1) → ((ℜ‘𝐴) ≤ (abs‘𝐴) ↔ (ℜ‘𝐴) ≤ 1))
19	16, 18	mpbid 222	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ (abs‘𝐴) = 1) → (ℜ‘𝐴) ≤ 1)
20		recl 13850	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ ℂ → (ℜ‘𝐴) ∈ ℝ)
21	20	recnd 10068	. . . . . . . . . . 11 ⊢ (𝐴 ∈ ℂ → (ℜ‘𝐴) ∈ ℂ)
22	21	subidd 10380	. . . . . . . . . 10 ⊢ (𝐴 ∈ ℂ → ((ℜ‘𝐴) − (ℜ‘𝐴)) = 0)
23	22	adantr 481	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ≤ 1) → ((ℜ‘𝐴) − (ℜ‘𝐴)) = 0)
24		simpl 473	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ≤ 1) → 𝐴 ∈ ℂ)
25	24	recld 13934	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ≤ 1) → (ℜ‘𝐴) ∈ ℝ)
26		1red 10055	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ≤ 1) → 1 ∈ ℝ)
27		simpr 477	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ≤ 1) → (ℜ‘𝐴) ≤ 1)
28	25, 26, 25, 27	lesub1dd 10643	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ≤ 1) → ((ℜ‘𝐴) − (ℜ‘𝐴)) ≤ (1 − (ℜ‘𝐴)))
29	23, 28	eqbrtrrd 4677	. . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ (ℜ‘𝐴) ≤ 1) → 0 ≤ (1 − (ℜ‘𝐴)))
30	19, 29	syldan 487	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ (abs‘𝐴) = 1) → 0 ≤ (1 − (ℜ‘𝐴)))
31		resub 13867	. . . . . . . . . 10 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (ℜ‘(1 − 𝐴)) = ((ℜ‘1) − (ℜ‘𝐴)))
32		re1 13894	. . . . . . . . . . 11 ⊢ (ℜ‘1) = 1
33	32	oveq1i 6660	. . . . . . . . . 10 ⊢ ((ℜ‘1) − (ℜ‘𝐴)) = (1 − (ℜ‘𝐴))
34	31, 33	syl6eq 2672	. . . . . . . . 9 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (ℜ‘(1 − 𝐴)) = (1 − (ℜ‘𝐴)))
35	1, 34	mpan 706	. . . . . . . 8 ⊢ (𝐴 ∈ ℂ → (ℜ‘(1 − 𝐴)) = (1 − (ℜ‘𝐴)))
36	35	adantr 481	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ (abs‘𝐴) = 1) → (ℜ‘(1 − 𝐴)) = (1 − (ℜ‘𝐴)))
37	30, 36	breqtrrd 4681	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ (abs‘𝐴) = 1) → 0 ≤ (ℜ‘(1 − 𝐴)))
38	37	3adant3 1081	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (abs‘𝐴) = 1 ∧ ¬ 1 = 𝐴) → 0 ≤ (ℜ‘(1 − 𝐴)))
39		argrege0 24357	. . . . . 6 ⊢ (((1 − 𝐴) ∈ ℂ ∧ (1 − 𝐴) ≠ 0 ∧ 0 ≤ (ℜ‘(1 − 𝐴))) → (ℑ‘(log‘(1 − 𝐴))) ∈ (-(π / 2)[,](π / 2)))
40		neghalfpirx 24218	. . . . . . 7 ⊢ -(π / 2) ∈ ℝ^*
41		halfpire 24216	. . . . . . . 8 ⊢ (π / 2) ∈ ℝ
42	41	rexri 10097	. . . . . . 7 ⊢ (π / 2) ∈ ℝ^*
43		iccleub 12229	. . . . . . 7 ⊢ ((-(π / 2) ∈ ℝ^* ∧ (π / 2) ∈ ℝ^* ∧ (ℑ‘(log‘(1 − 𝐴))) ∈ (-(π / 2)[,](π / 2))) → (ℑ‘(log‘(1 − 𝐴))) ≤ (π / 2))
44	40, 42, 43	mp3an12 1414	. . . . . 6 ⊢ ((ℑ‘(log‘(1 − 𝐴))) ∈ (-(π / 2)[,](π / 2)) → (ℑ‘(log‘(1 − 𝐴))) ≤ (π / 2))
45	39, 44	syl 17	. . . . 5 ⊢ (((1 − 𝐴) ∈ ℂ ∧ (1 − 𝐴) ≠ 0 ∧ 0 ≤ (ℜ‘(1 − 𝐴))) → (ℑ‘(log‘(1 − 𝐴))) ≤ (π / 2))
46	13, 14, 38, 45	syl3anc 1326	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ (abs‘𝐴) = 1 ∧ ¬ 1 = 𝐴) → (ℑ‘(log‘(1 − 𝐴))) ≤ (π / 2))
47		pirp 24213	. . . . 5 ⊢ π ∈ ℝ⁺
48		rphalflt 11860	. . . . 5 ⊢ (π ∈ ℝ⁺ → (π / 2) < π)
49	47, 48	ax-mp 5	. . . 4 ⊢ (π / 2) < π
50	46, 49	jctir 561	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ (abs‘𝐴) = 1 ∧ ¬ 1 = 𝐴) → ((ℑ‘(log‘(1 − 𝐴))) ≤ (π / 2) ∧ (π / 2) < π))
51		pire 24210	. . . . . . 7 ⊢ π ∈ ℝ
52	51	a1i 11	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ ¬ 1 = 𝐴) → π ∈ ℝ)
53	52	rehalfcld 11279	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ ¬ 1 = 𝐴) → (π / 2) ∈ ℝ)
54		lelttr 10128	. . . . 5 ⊢ (((ℑ‘(log‘(1 − 𝐴))) ∈ ℝ ∧ (π / 2) ∈ ℝ ∧ π ∈ ℝ) → (((ℑ‘(log‘(1 − 𝐴))) ≤ (π / 2) ∧ (π / 2) < π) → (ℑ‘(log‘(1 − 𝐴))) < π))
55	11, 53, 52, 54	syl3anc 1326	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ ¬ 1 = 𝐴) → (((ℑ‘(log‘(1 − 𝐴))) ≤ (π / 2) ∧ (π / 2) < π) → (ℑ‘(log‘(1 − 𝐴))) < π))
56	55	3adant2 1080	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ (abs‘𝐴) = 1 ∧ ¬ 1 = 𝐴) → (((ℑ‘(log‘(1 − 𝐴))) ≤ (π / 2) ∧ (π / 2) < π) → (ℑ‘(log‘(1 − 𝐴))) < π))
57	50, 56	mpd 15	. 2 ⊢ ((𝐴 ∈ ℂ ∧ (abs‘𝐴) = 1 ∧ ¬ 1 = 𝐴) → (ℑ‘(log‘(1 − 𝐴))) < π)
58	12, 57	ltned 10173	1 ⊢ ((𝐴 ∈ ℂ ∧ (abs‘𝐴) = 1 ∧ ¬ 1 = 𝐴) → (ℑ‘(log‘(1 − 𝐴))) ≠ π)

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 196 ∧ wa 384 ∧ w3a 1037 = wceq 1483 ∈ wcel 1990 ≠ wne 2794 class class class wbr 4653 ‘cfv 5888 (class class class)co 6650 ℂcc 9934 ℝcr 9935 0cc0 9936 1c1 9937 ℝ^*cxr 10073 < clt 10074 ≤ cle 10075 − cmin 10266 -cneg 10267 / cdiv 10684 2c2 11070 ℝ⁺crp 11832 [,]cicc 12178 ℜcre 13837 ℑcim 13838 abscabs 13974 πcpi 14797 logclog 24301

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-rep 4771 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-inf2 8538 ax-cnex 9992 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013 ax-pre-sup 10014 ax-addf 10015 ax-mulf 10016

This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-fal 1489 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-int 4476 df-iun 4522 df-iin 4523 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-se 5074 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-pred 5680 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-isom 5897 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-of 6897 df-om 7066 df-1st 7168 df-2nd 7169 df-supp 7296 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-1o 7560 df-2o 7561 df-oadd 7564 df-er 7742 df-map 7859 df-pm 7860 df-ixp 7909 df-en 7956 df-dom 7957 df-sdom 7958 df-fin 7959 df-fsupp 8276 df-fi 8317 df-sup 8348 df-inf 8349 df-oi 8415 df-card 8765 df-cda 8990 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-div 10685 df-nn 11021 df-2 11079 df-3 11080 df-4 11081 df-5 11082 df-6 11083 df-7 11084 df-8 11085 df-9 11086 df-n0 11293 df-z 11378 df-dec 11494 df-uz 11688 df-q 11789 df-rp 11833 df-xneg 11946 df-xadd 11947 df-xmul 11948 df-ioo 12179 df-ioc 12180 df-ico 12181 df-icc 12182 df-fz 12327 df-fzo 12466 df-fl 12593 df-mod 12669 df-seq 12802 df-exp 12861 df-fac 13061 df-bc 13090 df-hash 13118 df-shft 13807 df-cj 13839 df-re 13840 df-im 13841 df-sqrt 13975 df-abs 13976 df-limsup 14202 df-clim 14219 df-rlim 14220 df-sum 14417 df-ef 14798 df-sin 14800 df-cos 14801 df-pi 14803 df-struct 15859 df-ndx 15860 df-slot 15861 df-base 15863 df-sets 15864 df-ress 15865 df-plusg 15954 df-mulr 15955 df-starv 15956 df-sca 15957 df-vsca 15958 df-ip 15959 df-tset 15960 df-ple 15961 df-ds 15964 df-unif 15965 df-hom 15966 df-cco 15967 df-rest 16083 df-topn 16084 df-0g 16102 df-gsum 16103 df-topgen 16104 df-pt 16105 df-prds 16108 df-xrs 16162 df-qtop 16167 df-imas 16168 df-xps 16170 df-mre 16246 df-mrc 16247 df-acs 16249 df-mgm 17242 df-sgrp 17284 df-mnd 17295 df-submnd 17336 df-mulg 17541 df-cntz 17750 df-cmn 18195 df-psmet 19738 df-xmet 19739 df-met 19740 df-bl 19741 df-mopn 19742 df-fbas 19743 df-fg 19744 df-cnfld 19747 df-top 20699 df-topon 20716 df-topsp 20737 df-bases 20750 df-cld 20823 df-ntr 20824 df-cls 20825 df-nei 20902 df-lp 20940 df-perf 20941 df-cn 21031 df-cnp 21032 df-haus 21119 df-tx 21365 df-hmeo 21558 df-fil 21650 df-fm 21742 df-flim 21743 df-flf 21744 df-xms 22125 df-ms 22126 df-tms 22127 df-cncf 22681 df-limc 23630 df-dv 23631 df-log 24303

This theorem is referenced by: isosctrlem2 24549

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