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Theorem normlem7tALT 27154
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
StepHypRef Expression
1 fveq2 6088 . . . . 5 (𝑆 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → (∗‘𝑆) = (∗‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)))
21oveq1d 6542 . . . 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 6534 . . . 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)))
42, 3oveq12d 6545 . . 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))))
54breq1d 4588 . 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 2676 . . . . . 6 (𝑆 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → (𝑆 ∈ ℂ ↔ if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) ∈ ℂ))
7 fveq2 6088 . . . . . . 7 (𝑆 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → (abs‘𝑆) = (abs‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)))
87eqeq1d 2612 . . . . . 6 (𝑆 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → ((abs‘𝑆) = 1 ↔ (abs‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)) = 1))
96, 8anbi12d 743 . . . . 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 2676 . . . . . 6 (1 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → (1 ∈ ℂ ↔ if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) ∈ ℂ))
11 fveq2 6088 . . . . . . 7 (1 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → (abs‘1) = (abs‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)))
1211eqeq1d 2612 . . . . . 6 (1 = if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) → ((abs‘1) = 1 ↔ (abs‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)) = 1))
1310, 12anbi12d 743 . . . . 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 9851 . . . . . 6 1 ∈ ℂ
15 abs1 13834 . . . . . 6 (abs‘1) = 1
1614, 15pm3.2i 470 . . . . 5 (1 ∈ ℂ ∧ (abs‘1) = 1)
179, 13, 16elimhyp 4096 . . . 4 (if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) ∈ ℂ ∧ (abs‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)) = 1)
1817simpli 473 . . 3 if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1) ∈ ℂ
19 normlem7t.1 . . 3 𝐴 ∈ ℋ
20 normlem7t.2 . . 3 𝐵 ∈ ℋ
2117simpri 477 . . 3 (abs‘if((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1), 𝑆, 1)) = 1
2218, 19, 20, 21normlem7 27151 . 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))))
235, 22dedth 4089 1 ((𝑆 ∈ ℂ ∧ (abs‘𝑆) = 1) → (((∗‘𝑆) · (𝐴 ·ih 𝐵)) + (𝑆 · (𝐵 ·ih 𝐴))) ≤ (2 · ((√‘(𝐵 ·ih 𝐵)) · (√‘(𝐴 ·ih 𝐴)))))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 383   = wceq 1475  wcel 1977  ifcif 4036   class class class wbr 4578  cfv 5790  (class class class)co 6527  cc 9791  1c1 9794   + caddc 9796   · cmul 9798  cle 9932  2c2 10920  ccj 13633  csqrt 13770  abscabs 13771  chil 26954   ·ih csp 26957
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-sep 4704  ax-nul 4712  ax-pow 4764  ax-pr 4828  ax-un 6825  ax-cnex 9849  ax-resscn 9850  ax-1cn 9851  ax-icn 9852  ax-addcl 9853  ax-addrcl 9854  ax-mulcl 9855  ax-mulrcl 9856  ax-mulcom 9857  ax-addass 9858  ax-mulass 9859  ax-distr 9860  ax-i2m1 9861  ax-1ne0 9862  ax-1rid 9863  ax-rnegex 9864  ax-rrecex 9865  ax-cnre 9866  ax-pre-lttri 9867  ax-pre-lttrn 9868  ax-pre-ltadd 9869  ax-pre-mulgt0 9870  ax-pre-sup 9871  ax-hfvadd 27035  ax-hv0cl 27038  ax-hfvmul 27040  ax-hvmulass 27042  ax-hvmul0 27045  ax-hfi 27114  ax-his1 27117  ax-his2 27118  ax-his3 27119  ax-his4 27120
This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rmo 2904  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4368  df-iun 4452  df-br 4579  df-opab 4639  df-mpt 4640  df-tr 4676  df-eprel 4939  df-id 4943  df-po 4949  df-so 4950  df-fr 4987  df-we 4989  df-xp 5034  df-rel 5035  df-cnv 5036  df-co 5037  df-dm 5038  df-rn 5039  df-res 5040  df-ima 5041  df-pred 5583  df-ord 5629  df-on 5630  df-lim 5631  df-suc 5632  df-iota 5754  df-fun 5792  df-fn 5793  df-f 5794  df-f1 5795  df-fo 5796  df-f1o 5797  df-fv 5798  df-riota 6489  df-ov 6530  df-oprab 6531  df-mpt2 6532  df-om 6936  df-2nd 7038  df-wrecs 7272  df-recs 7333  df-rdg 7371  df-er 7607  df-en 7820  df-dom 7821  df-sdom 7822  df-sup 8209  df-pnf 9933  df-mnf 9934  df-xr 9935  df-ltxr 9936  df-le 9937  df-sub 10120  df-neg 10121  df-div 10537  df-nn 10871  df-2 10929  df-3 10930  df-4 10931  df-n0 11143  df-z 11214  df-uz 11523  df-rp 11668  df-seq 12622  df-exp 12681  df-cj 13636  df-re 13637  df-im 13638  df-sqrt 13772  df-abs 13773  df-hvsub 27006
This theorem is referenced by:  bcsiALT  27214
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