Theorem normlem7tALT 29006

Description: Lemma used to derive properties of norm. Part of Theorem 3.3(ii) of [Beran] p. 97. (Contributed by NM, 11-Oct-1999.) (New usage is discouraged.) (Proof modification is discouraged.)

Hypotheses

Ref	Expression
normlem7t.1	⊢ 𝐴 ∈ ℋ
normlem7t.2	⊢ 𝐵 ∈ ℋ

Assertion

Ref	Expression
normlem7tALT	⊢ ((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1) → (((∗‘𝑆) · (𝐴 ·ih 𝐵)) + (𝑆 · (𝐵 ·ih 𝐴))) ≤ (2 · ((√‘(𝐵 ·ih 𝐵)) · (√‘(𝐴 ·ih 𝐴)))))

Proof of Theorem normlem7tALT

Step	Hyp	Ref	Expression
1		fveq2 6662	. . . . 5 ⊢ (𝑆 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → (∗‘𝑆) = (∗‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)))
2	1	oveq1d 7170	. . . 4 ⊢ (𝑆 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → ((∗‘𝑆) · (𝐴 ·ih 𝐵)) = ((∗‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)) · (𝐴 ·ih 𝐵)))
3		oveq1 7162	. . . 4 ⊢ (𝑆 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → (𝑆 · (𝐵 ·ih 𝐴)) = (if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) · (𝐵 ·ih 𝐴)))
4	2, 3	oveq12d 7173	. . 3 ⊢ (𝑆 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → (((∗‘𝑆) · (𝐴 ·ih 𝐵)) + (𝑆 · (𝐵 ·ih 𝐴))) = (((∗‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)) · (𝐴 ·ih 𝐵)) + (if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) · (𝐵 ·ih 𝐴))))
5	4	breq1d 5045	. 2 ⊢ (𝑆 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → ((((∗‘𝑆) · (𝐴 ·ih 𝐵)) + (𝑆 · (𝐵 ·ih 𝐴))) ≤ (2 · ((√‘(𝐵 ·ih 𝐵)) · (√‘(𝐴 ·ih 𝐴)))) ↔ (((∗‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)) · (𝐴 ·ih 𝐵)) + (if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) · (𝐵 ·ih 𝐴))) ≤ (2 · ((√‘(𝐵 ·ih 𝐵)) · (√‘(𝐴 ·ih 𝐴))))))
6		eleq1 2839	. . . . . 6 ⊢ (𝑆 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → (𝑆 ∈ ℂ ↔ if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) ∈ ℂ))
7		fveq2 6662	. . . . . . 7 ⊢ (𝑆 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → (abs‘𝑆) = (abs‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)))
8	7	eqeq1d 2760	. . . . . 6 ⊢ (𝑆 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → ((abs‘𝑆) = 1 ↔ (abs‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)) = 1))
9	6, 8	anbi12d 633	. . . . 5 ⊢ (𝑆 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → ((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1) ↔ (if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) ∈ ℂ ∧ (abs‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)) = 1)))
10		eleq1 2839	. . . . . 6 ⊢ (1 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → (1 ∈ ℂ ↔ if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) ∈ ℂ))
11		fveq2 6662	. . . . . . 7 ⊢ (1 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → (abs‘1) = (abs‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)))
12	11	eqeq1d 2760	. . . . . 6 ⊢ (1 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → ((abs‘1) = 1 ↔ (abs‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)) = 1))
13	10, 12	anbi12d 633	. . . . 5 ⊢ (1 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → ((1 ∈ ℂ ∧ (abs‘1) = 1) ↔ (if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) ∈ ℂ ∧ (abs‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)) = 1)))
14		ax-1cn 10638	. . . . . 6 ⊢ 1 ∈ ℂ
15		abs1 14710	. . . . . 6 ⊢ (abs‘1) = 1
16	14, 15	pm3.2i 474	. . . . 5 ⊢ (1 ∈ ℂ ∧ (abs‘1) = 1)
17	9, 13, 16	elimhyp 4488	. . . 4 ⊢ (if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) ∈ ℂ ∧ (abs‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)) = 1)
18	17	simpli 487	. . 3 ⊢ if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) ∈ ℂ
19		normlem7t.1	. . 3 ⊢ 𝐴 ∈ ℋ
20		normlem7t.2	. . 3 ⊢ 𝐵 ∈ ℋ
21	17	simpri 489	. . 3 ⊢ (abs‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)) = 1
22	18, 19, 20, 21	normlem7 29003	. 2 ⊢ (((∗‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)) · (𝐴 ·ih 𝐵)) + (if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) · (𝐵 ·ih 𝐴))) ≤ (2 · ((√‘(𝐵 ·ih 𝐵)) · (√‘(𝐴 ·ih 𝐴))))
23	5, 22	dedth 4481	1 ⊢ ((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1) → (((∗‘𝑆) · (𝐴 ·ih 𝐵)) + (𝑆 · (𝐵 ·ih 𝐴))) ≤ (2 · ((√‘(𝐵 ·ih 𝐵)) · (√‘(𝐴 ·ih 𝐴)))))

Syntax hints:   → wi 4   ∧ wa 399   = wceq 1538   ∈ wcel 2111  ifcif 4423   class class class wbr 5035  ‘cfv 6339  (class class class)co 7155  ℂcc 10578  1c1 10581   + caddc 10583   · cmul 10585   ≤ cle 10719  2c2 11734  ∗ccj 14508  √csqrt 14645  abscabs 14646   ℋchba 28806   ·_ih csp 28809

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2729  ax-sep 5172  ax-nul 5179  ax-pow 5237  ax-pr 5301  ax-un 7464  ax-cnex 10636  ax-resscn 10637  ax-1cn 10638  ax-icn 10639  ax-addcl 10640  ax-addrcl 10641  ax-mulcl 10642  ax-mulrcl 10643  ax-mulcom 10644  ax-addass 10645  ax-mulass 10646  ax-distr 10647  ax-i2m1 10648  ax-1ne0 10649  ax-1rid 10650  ax-rnegex 10651  ax-rrecex 10652  ax-cnre 10653  ax-pre-lttri 10654  ax-pre-lttrn 10655  ax-pre-ltadd 10656  ax-pre-mulgt0 10657  ax-pre-sup 10658  ax-hfvadd 28887  ax-hv0cl 28890  ax-hfvmul 28892  ax-hvmulass 28894  ax-hvmul0 28897  ax-hfi 28966  ax-his1 28969  ax-his2 28970  ax-his3 28971  ax-his4 28972

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-fal 1551  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2557  df-eu 2588  df-clab 2736  df-cleq 2750  df-clel 2830  df-nfc 2901  df-ne 2952  df-nel 3056  df-ral 3075  df-rex 3076  df-reu 3077  df-rmo 3078  df-rab 3079  df-v 3411  df-sbc 3699  df-csb 3808  df-dif 3863  df-un 3865  df-in 3867  df-ss 3877  df-pss 3879  df-nul 4228  df-if 4424  df-pw 4499  df-sn 4526  df-pr 4528  df-tp 4530  df-op 4532  df-uni 4802  df-iun 4888  df-br 5036  df-opab 5098  df-mpt 5116  df-tr 5142  df-id 5433  df-eprel 5438  df-po 5446  df-so 5447  df-fr 5486  df-we 5488  df-xp 5533  df-rel 5534  df-cnv 5535  df-co 5536  df-dm 5537  df-rn 5538  df-res 5539  df-ima 5540  df-pred 6130  df-ord 6176  df-on 6177  df-lim 6178  df-suc 6179  df-iota 6298  df-fun 6341  df-fn 6342  df-f 6343  df-f1 6344  df-fo 6345  df-f1o 6346  df-fv 6347  df-riota 7113  df-ov 7158  df-oprab 7159  df-mpo 7160  df-om 7585  df-2nd 7699  df-wrecs 7962  df-recs 8023  df-rdg 8061  df-er 8304  df-en 8533  df-dom 8534  df-sdom 8535  df-sup 8944  df-pnf 10720  df-mnf 10721  df-xr 10722  df-ltxr 10723  df-le 10724  df-sub 10915  df-neg 10916  df-div 11341  df-nn 11680  df-2 11742  df-3 11743  df-4 11744  df-n0 11940  df-z 12026  df-uz 12288  df-rp 12436  df-seq 13424  df-exp 13485  df-cj 14511  df-re 14512  df-im 14513  df-sqrt 14647  df-abs 14648  df-hvsub 28858

This theorem is referenced by:  bcsiALT  29066