Theorem nmoplb 32510

Description: A lower bound for an operator norm. (Contributed by NM, 7-Feb-2006.) (New usage is discouraged.)

Assertion

Ref	Expression
nmoplb	⊢ ((𝑇: ℋ⟶ ℋ ∧ 𝐴 ∈ ℋ ∧ (normℎ‘𝐴) ≤ 1) → (normℎ‘(𝑇‘𝐴)) ≤ (normop‘𝑇))

Proof of Theorem nmoplb

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		nmopsetretHIL 32467	. . . . 5 ⊢ (𝑇: ℋ⟶ ℋ → {𝑥 ∣ ∃𝑦 ∈ ℋ ((normℎ‘𝑦) ≤ 1 ∧ 𝑥 = (normℎ‘(𝑇‘𝑦)))} ⊆ ℝ)
2		ressxr 11354	. . . . 5 ⊢ ℝ ⊆ ℝ*
3	1, 2	sstrdi 3941	. . . 4 ⊢ (𝑇: ℋ⟶ ℋ → {𝑥 ∣ ∃𝑦 ∈ ℋ ((normℎ‘𝑦) ≤ 1 ∧ 𝑥 = (normℎ‘(𝑇‘𝑦)))} ⊆ ℝ*)
4	3	3ad2ant1 1151	. . 3 ⊢ ((𝑇: ℋ⟶ ℋ ∧ 𝐴 ∈ ℋ ∧ (normℎ‘𝐴) ≤ 1) → {𝑥 ∣ ∃𝑦 ∈ ℋ ((normℎ‘𝑦) ≤ 1 ∧ 𝑥 = (normℎ‘(𝑇‘𝑦)))} ⊆ ℝ*)
5		fveq2 6886	. . . . . . . . 9 ⊢ (𝑦 = 𝐴 → (normℎ‘𝑦) = (normℎ‘𝐴))
6	5	breq1d 5113	. . . . . . . 8 ⊢ (𝑦 = 𝐴 → ((normℎ‘𝑦) ≤ 1 ↔ (normℎ‘𝐴) ≤ 1))
7		2fveq3 6891	. . . . . . . . 9 ⊢ (𝑦 = 𝐴 → (normℎ‘(𝑇‘𝑦)) = (normℎ‘(𝑇‘𝐴)))
8	7	eqeq2d 2772	. . . . . . . 8 ⊢ (𝑦 = 𝐴 → ((normℎ‘(𝑇‘𝐴)) = (normℎ‘(𝑇‘𝑦)) ↔ (normℎ‘(𝑇‘𝐴)) = (normℎ‘(𝑇‘𝐴))))
9	6, 8	anbi12d 644	. . . . . . 7 ⊢ (𝑦 = 𝐴 → (((normℎ‘𝑦) ≤ 1 ∧ (normℎ‘(𝑇‘𝐴)) = (normℎ‘(𝑇‘𝑦))) ↔ ((normℎ‘𝐴) ≤ 1 ∧ (normℎ‘(𝑇‘𝐴)) = (normℎ‘(𝑇‘𝐴)))))
10		eqid 2761	. . . . . . . 8 ⊢ (normℎ‘(𝑇‘𝐴)) = (normℎ‘(𝑇‘𝐴))
11	10	biantru 539	. . . . . . 7 ⊢ ((normℎ‘𝐴) ≤ 1 ↔ ((normℎ‘𝐴) ≤ 1 ∧ (normℎ‘(𝑇‘𝐴)) = (normℎ‘(𝑇‘𝐴))))
12	9, 11	bitr4di 292	. . . . . 6 ⊢ (𝑦 = 𝐴 → (((normℎ‘𝑦) ≤ 1 ∧ (normℎ‘(𝑇‘𝐴)) = (normℎ‘(𝑇‘𝑦))) ↔ (normℎ‘𝐴) ≤ 1))
13	12	rspcev 3577	. . . . 5 ⊢ ((𝐴 ∈ ℋ ∧ (normℎ‘𝐴) ≤ 1) → ∃𝑦 ∈ ℋ ((normℎ‘𝑦) ≤ 1 ∧ (normℎ‘(𝑇‘𝐴)) = (normℎ‘(𝑇‘𝑦))))
14		fvex 6899	. . . . . 6 ⊢ (normℎ‘(𝑇‘𝐴)) ∈ V
15		eqeq1 2765	. . . . . . . 8 ⊢ (𝑥 = (normℎ‘(𝑇‘𝐴)) → (𝑥 = (normℎ‘(𝑇‘𝑦)) ↔ (normℎ‘(𝑇‘𝐴)) = (normℎ‘(𝑇‘𝑦))))
16	15	anbi2d 642	. . . . . . 7 ⊢ (𝑥 = (normℎ‘(𝑇‘𝐴)) → (((normℎ‘𝑦) ≤ 1 ∧ 𝑥 = (normℎ‘(𝑇‘𝑦))) ↔ ((normℎ‘𝑦) ≤ 1 ∧ (normℎ‘(𝑇‘𝐴)) = (normℎ‘(𝑇‘𝑦)))))
17	16	rexbidv 3187	. . . . . 6 ⊢ (𝑥 = (normℎ‘(𝑇‘𝐴)) → (∃𝑦 ∈ ℋ ((normℎ‘𝑦) ≤ 1 ∧ 𝑥 = (normℎ‘(𝑇‘𝑦))) ↔ ∃𝑦 ∈ ℋ ((normℎ‘𝑦) ≤ 1 ∧ (normℎ‘(𝑇‘𝐴)) = (normℎ‘(𝑇‘𝑦)))))
18	14, 17	elab 3633	. . . . 5 ⊢ ((normℎ‘(𝑇‘𝐴)) ∈ {𝑥 ∣ ∃𝑦 ∈ ℋ ((normℎ‘𝑦) ≤ 1 ∧ 𝑥 = (normℎ‘(𝑇‘𝑦)))} ↔ ∃𝑦 ∈ ℋ ((normℎ‘𝑦) ≤ 1 ∧ (normℎ‘(𝑇‘𝐴)) = (normℎ‘(𝑇‘𝑦))))
19	13, 18	sylibr 237	. . . 4 ⊢ ((𝐴 ∈ ℋ ∧ (normℎ‘𝐴) ≤ 1) → (normℎ‘(𝑇‘𝐴)) ∈ {𝑥 ∣ ∃𝑦 ∈ ℋ ((normℎ‘𝑦) ≤ 1 ∧ 𝑥 = (normℎ‘(𝑇‘𝑦)))})
20	19	3adant1 1148	. . 3 ⊢ ((𝑇: ℋ⟶ ℋ ∧ 𝐴 ∈ ℋ ∧ (normℎ‘𝐴) ≤ 1) → (normℎ‘(𝑇‘𝐴)) ∈ {𝑥 ∣ ∃𝑦 ∈ ℋ ((normℎ‘𝑦) ≤ 1 ∧ 𝑥 = (normℎ‘(𝑇‘𝑦)))})
21		supxrub 13455	. . 3 ⊢ (({𝑥 ∣ ∃𝑦 ∈ ℋ ((normℎ‘𝑦) ≤ 1 ∧ 𝑥 = (normℎ‘(𝑇‘𝑦)))} ⊆ ℝ* ∧ (normℎ‘(𝑇‘𝐴)) ∈ {𝑥 ∣ ∃𝑦 ∈ ℋ ((normℎ‘𝑦) ≤ 1 ∧ 𝑥 = (normℎ‘(𝑇‘𝑦)))}) → (normℎ‘(𝑇‘𝐴)) ≤ sup({𝑥 ∣ ∃𝑦 ∈ ℋ ((normℎ‘𝑦) ≤ 1 ∧ 𝑥 = (normℎ‘(𝑇‘𝑦)))}, ℝ*, < ))
22	4, 20, 21	syl2anc 596	. 2 ⊢ ((𝑇: ℋ⟶ ℋ ∧ 𝐴 ∈ ℋ ∧ (normℎ‘𝐴) ≤ 1) → (normℎ‘(𝑇‘𝐴)) ≤ sup({𝑥 ∣ ∃𝑦 ∈ ℋ ((normℎ‘𝑦) ≤ 1 ∧ 𝑥 = (normℎ‘(𝑇‘𝑦)))}, ℝ*, < ))
23		nmopval 32459	. . 3 ⊢ (𝑇: ℋ⟶ ℋ → (normop‘𝑇) = sup({𝑥 ∣ ∃𝑦 ∈ ℋ ((normℎ‘𝑦) ≤ 1 ∧ 𝑥 = (normℎ‘(𝑇‘𝑦)))}, ℝ*, < ))
24	23	3ad2ant1 1151	. 2 ⊢ ((𝑇: ℋ⟶ ℋ ∧ 𝐴 ∈ ℋ ∧ (normℎ‘𝐴) ≤ 1) → (normop‘𝑇) = sup({𝑥 ∣ ∃𝑦 ∈ ℋ ((normℎ‘𝑦) ≤ 1 ∧ 𝑥 = (normℎ‘(𝑇‘𝑦)))}, ℝ*, < ))
25	22, 24	breqtrrd 5133	1 ⊢ ((𝑇: ℋ⟶ ℋ ∧ 𝐴 ∈ ℋ ∧ (normℎ‘𝐴) ≤ 1) → (normℎ‘(𝑇‘𝐴)) ≤ (normop‘𝑇))

This proof depends on syntax axioms:   → wi 4   ∧ wa 401   ∧ w3a 1103   = wceq 1570   ∈ wcel 2145  {cab 2739  ∃wrex 3087   ⊆ wss 3914   class class class wbr 5103  ⟶wf 6535  ‘cfv 6539  supcsup 9433  ℝcr 11200  1c1 11202  ℝ^*cxr 11343   < clt 11344   ≤ cle 11345   ℋchba 31522  norm_ℎcno 31526  norm_opcnop 31548

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2213  ax-ext 2733  ax-rep 5232  ax-sep 5249  ax-nul 5260  ax-pow 5327  ax-pr 5391  ax-un 7752  ax-cnex 11257  ax-resscn 11258  ax-1cn 11259  ax-icn 11260  ax-addcl 11261  ax-addrcl 11262  ax-mulcl 11263  ax-mulrcl 11264  ax-mulcom 11265  ax-addass 11266  ax-mulass 11267  ax-distr 11268  ax-i2m1 11269  ax-1ne0 11270  ax-1rid 11271  ax-rnegex 11272  ax-rrecex 11273  ax-cnre 11274  ax-pre-lttri 11275  ax-pre-lttrn 11276  ax-pre-ltadd 11277  ax-pre-mulgt0 11278  ax-pre-sup 11279  ax-hilex 31602  ax-hfvadd 31603  ax-hvcom 31604  ax-hvass 31605  ax-hv0cl 31606  ax-hvaddid 31607  ax-hfvmul 31608  ax-hvmulid 31609  ax-hvmulass 31610  ax-hvdistr1 31611  ax-hvdistr2 31612  ax-hvmul0 31613  ax-hfi 31682  ax-his1 31685  ax-his2 31686  ax-his3 31687  ax-his4 31688

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-nel 3063  df-ral 3078  df-rex 3088  df-rmo 3366  df-reu 3367  df-rab 3414  df-v 3453  df-sbc 3740  df-csb 3848  df-dif 3900  df-un 3902  df-in 3904  df-ss 3915  df-pss 4035  df-nul 4280  df-if 4483  df-pw 4559  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-iun 4953  df-br 5104  df-opab 5168  df-mpt 5187  df-tr 5213  df-id 5546  df-eprel 5551  df-po 5559  df-so 5560  df-fr 5604  df-we 5606  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-rn 5662  df-res 5663  df-ima 5664  df-pred 6305  df-ord 6366  df-on 6367  df-lim 6368  df-suc 6369  df-iota 6495  df-fun 6541  df-fn 6542  df-f 6543  df-f1 6544  df-fo 6545  df-f1o 6546  df-fv 6547  df-riota 7378  df-ov 7424  df-oprab 7425  df-mpo 7426  df-om 7879  df-1st 8002  df-2nd 8003  df-frecs 8300  df-wrecs 8331  df-recs 8380  df-rdg 8419  df-er 8718  df-map 8850  df-en 8975  df-dom 8976  df-sdom 8977  df-sup 9435  df-pnf 11346  df-mnf 11347  df-xr 11348  df-ltxr 11349  df-le 11350  df-sub 11544  df-neg 11545  df-div 11975  df-nn 12337  df-2 12406  df-3 12407  df-4 12408  df-n0 12608  df-z 12695  df-uz 12967  df-rp 13122  df-seq 14146  df-exp 14206  df-cj 15267  df-re 15268  df-im 15269  df-sqrt 15403  df-abs 15404  df-grpo 31096  df-gid 31097  df-ablo 31148  df-vc 31162  df-nv 31195  df-va 31198  df-ba 31199  df-sm 31200  df-0v 31201  df-nmcv 31203  df-hnorm 31571  df-hba 31572  df-hvsub 31574  df-nmop 32442

This theorem is used by:  nmopge0  32514  nmbdoplbi  32627  nmcoplbi  32631  nmophmi  32634  nmoptrii  32697  nmopcoi  32698