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Theorem nmosetre 30835

Description: The set in the supremum of the operator norm definition df-nmoo 30816 is a set of reals. (Contributed by NM, 13-Nov-2007.) (New usage is discouraged.)

**Hypotheses**
Ref	Expression
nmosetre.2	⊢ 𝑌 = (BaseSet‘𝑊)
nmosetre.4	⊢ 𝑁 = (norm_CV‘𝑊)

**Assertion**
Ref	Expression
nmosetre	⊢ ((𝑊 ∈ NrmCVec ∧ 𝑇:𝑋⟶𝑌) → {𝑥 ∣ ∃𝑧 ∈ 𝑋 ((𝑀‘𝑧) ≤ 1 ∧ 𝑥 = (𝑁‘(𝑇‘𝑧)))} ⊆ ℝ)

Distinct variable groups: 𝑥,𝑧,𝑇 𝑥,𝑊,𝑧 𝑥,𝑋,𝑧 𝑥,𝑌,𝑧 Allowed substitution hints: 𝑀(𝑥,𝑧) 𝑁(𝑥,𝑧)

**Proof of Theorem nmosetre**
Step	Hyp	Ref	Expression
1		ffvelcdm 7033	. . . . . . . 8 ⊢ ((𝑇:𝑋⟶𝑌 ∧ 𝑧 ∈ 𝑋) → (𝑇‘𝑧) ∈ 𝑌)
2		nmosetre.2	. . . . . . . . 9 ⊢ 𝑌 = (BaseSet‘𝑊)
3		nmosetre.4	. . . . . . . . 9 ⊢ 𝑁 = (norm_CV‘𝑊)
4	2, 3	nvcl 30732	. . . . . . . 8 ⊢ ((𝑊 ∈ NrmCVec ∧ (𝑇‘𝑧) ∈ 𝑌) → (𝑁‘(𝑇‘𝑧)) ∈ ℝ)
5	1, 4	sylan2 594	. . . . . . 7 ⊢ ((𝑊 ∈ NrmCVec ∧ (𝑇:𝑋⟶𝑌 ∧ 𝑧 ∈ 𝑋)) → (𝑁‘(𝑇‘𝑧)) ∈ ℝ)
6	5	anassrs 467	. . . . . 6 ⊢ (((𝑊 ∈ NrmCVec ∧ 𝑇:𝑋⟶𝑌) ∧ 𝑧 ∈ 𝑋) → (𝑁‘(𝑇‘𝑧)) ∈ ℝ)
7		eleq1 2824	. . . . . 6 ⊢ (𝑥 = (𝑁‘(𝑇‘𝑧)) → (𝑥 ∈ ℝ ↔ (𝑁‘(𝑇‘𝑧)) ∈ ℝ))
8	6, 7	imbitrrid 246	. . . . 5 ⊢ (𝑥 = (𝑁‘(𝑇‘𝑧)) → (((𝑊 ∈ NrmCVec ∧ 𝑇:𝑋⟶𝑌) ∧ 𝑧 ∈ 𝑋) → 𝑥 ∈ ℝ))
9	8	impcom 407	. . . 4 ⊢ ((((𝑊 ∈ NrmCVec ∧ 𝑇:𝑋⟶𝑌) ∧ 𝑧 ∈ 𝑋) ∧ 𝑥 = (𝑁‘(𝑇‘𝑧))) → 𝑥 ∈ ℝ)
10	9	adantrl 717	. . 3 ⊢ ((((𝑊 ∈ NrmCVec ∧ 𝑇:𝑋⟶𝑌) ∧ 𝑧 ∈ 𝑋) ∧ ((𝑀‘𝑧) ≤ 1 ∧ 𝑥 = (𝑁‘(𝑇‘𝑧)))) → 𝑥 ∈ ℝ)
11	10	rexlimdva2 3140	. 2 ⊢ ((𝑊 ∈ NrmCVec ∧ 𝑇:𝑋⟶𝑌) → (∃𝑧 ∈ 𝑋 ((𝑀‘𝑧) ≤ 1 ∧ 𝑥 = (𝑁‘(𝑇‘𝑧))) → 𝑥 ∈ ℝ))
12	11	abssdv 4007	1 ⊢ ((𝑊 ∈ NrmCVec ∧ 𝑇:𝑋⟶𝑌) → {𝑥 ∣ ∃𝑧 ∈ 𝑋 ((𝑀‘𝑧) ≤ 1 ∧ 𝑥 = (𝑁‘(𝑇‘𝑧)))} ⊆ ℝ)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 {cab 2714 ∃wrex 3061 ⊆ wss 3889 class class class wbr 5085 ⟶wf 6494 ‘cfv 6498 ℝcr 11037 1c1 11039 ≤ cle 11180 NrmCVeccnv 30655 BaseSetcba 30657 norm_CVcnmcv 30661

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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pr 5375 ax-un 7689

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3062 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-ov 7370 df-oprab 7371 df-1st 7942 df-2nd 7943 df-vc 30630 df-nv 30663 df-va 30666 df-ba 30667 df-sm 30668 df-0v 30669 df-nmcv 30671

This theorem is referenced by: nmoxr 30837 nmooge0 30838 nmorepnf 30839 nmoolb 30842 nmoubi 30843 nmlno0lem 30864 nmopsetretHIL 31935

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