Theorem omessle 46518

Description: The outer measure of a set is greater than or equal to the measure of a subset, Definition 113A (ii) of [Fremlin1] p. 19. (Contributed by Glauco Siliprandi, 17-Aug-2020.)

Hypotheses

Ref	Expression
omessle.o	⊢ (𝜑 → 𝑂 ∈ OutMeas)
omessle.x	⊢ 𝑋 = ∪ dom 𝑂
omessle.b	⊢ (𝜑 → 𝐵 ⊆ 𝑋)
omessle.a	⊢ (𝜑 → 𝐴 ⊆ 𝐵)

Assertion

Ref	Expression
omessle	⊢ (𝜑 → (𝑂‘𝐴) ≤ (𝑂‘𝐵))

Proof of Theorem omessle

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

Step	Hyp	Ref	Expression
1		omessle.a	. . 3 ⊢ (𝜑 → 𝐴 ⊆ 𝐵)
2		omessle.o	. . . . . . 7 ⊢ (𝜑 → 𝑂 ∈ OutMeas)
3		omessle.x	. . . . . . 7 ⊢ 𝑋 = ∪ dom 𝑂
4	2, 3	unidmex 45060	. . . . . 6 ⊢ (𝜑 → 𝑋 ∈ V)
5		omessle.b	. . . . . 6 ⊢ (𝜑 → 𝐵 ⊆ 𝑋)
6	4, 5	ssexd 5323	. . . . 5 ⊢ (𝜑 → 𝐵 ∈ V)
7	6, 1	ssexd 5323	. . . 4 ⊢ (𝜑 → 𝐴 ∈ V)
8		elpwg 4602	. . . 4 ⊢ (𝐴 ∈ V → (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵))
9	7, 8	syl 17	. . 3 ⊢ (𝜑 → (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵))
10	1, 9	mpbird 257	. 2 ⊢ (𝜑 → 𝐴 ∈ 𝒫 𝐵)
11	5, 3	sseqtrdi 4023	. . . 4 ⊢ (𝜑 → 𝐵 ⊆ ∪ dom 𝑂)
12		elpwg 4602	. . . . 5 ⊢ (𝐵 ∈ V → (𝐵 ∈ 𝒫 ∪ dom 𝑂 ↔ 𝐵 ⊆ ∪ dom 𝑂))
13	6, 12	syl 17	. . . 4 ⊢ (𝜑 → (𝐵 ∈ 𝒫 ∪ dom 𝑂 ↔ 𝐵 ⊆ ∪ dom 𝑂))
14	11, 13	mpbird 257	. . 3 ⊢ (𝜑 → 𝐵 ∈ 𝒫 ∪ dom 𝑂)
15		isome 46514	. . . . . 6 ⊢ (𝑂 ∈ OutMeas → (𝑂 ∈ OutMeas ↔ ((((𝑂:dom 𝑂⟶(0[,]+∞) ∧ dom 𝑂 = 𝒫 ∪ dom 𝑂) ∧ (𝑂‘∅) = 0) ∧ ∀𝑦 ∈ 𝒫 ∪ dom 𝑂∀𝑧 ∈ 𝒫 𝑦(𝑂‘𝑧) ≤ (𝑂‘𝑦)) ∧ ∀𝑦 ∈ 𝒫 dom 𝑂(𝑦 ≼ ω → (𝑂‘∪ 𝑦) ≤ (Σ^‘(𝑂 ↾ 𝑦))))))
16	2, 15	syl 17	. . . . 5 ⊢ (𝜑 → (𝑂 ∈ OutMeas ↔ ((((𝑂:dom 𝑂⟶(0[,]+∞) ∧ dom 𝑂 = 𝒫 ∪ dom 𝑂) ∧ (𝑂‘∅) = 0) ∧ ∀𝑦 ∈ 𝒫 ∪ dom 𝑂∀𝑧 ∈ 𝒫 𝑦(𝑂‘𝑧) ≤ (𝑂‘𝑦)) ∧ ∀𝑦 ∈ 𝒫 dom 𝑂(𝑦 ≼ ω → (𝑂‘∪ 𝑦) ≤ (Σ^‘(𝑂 ↾ 𝑦))))))
17	2, 16	mpbid 232	. . . 4 ⊢ (𝜑 → ((((𝑂:dom 𝑂⟶(0[,]+∞) ∧ dom 𝑂 = 𝒫 ∪ dom 𝑂) ∧ (𝑂‘∅) = 0) ∧ ∀𝑦 ∈ 𝒫 ∪ dom 𝑂∀𝑧 ∈ 𝒫 𝑦(𝑂‘𝑧) ≤ (𝑂‘𝑦)) ∧ ∀𝑦 ∈ 𝒫 dom 𝑂(𝑦 ≼ ω → (𝑂‘∪ 𝑦) ≤ (Σ^‘(𝑂 ↾ 𝑦)))))
18	17	simplrd 769	. . 3 ⊢ (𝜑 → ∀𝑦 ∈ 𝒫 ∪ dom 𝑂∀𝑧 ∈ 𝒫 𝑦(𝑂‘𝑧) ≤ (𝑂‘𝑦))
19		pweq 4613	. . . . . 6 ⊢ (𝑦 = 𝐵 → 𝒫 𝑦 = 𝒫 𝐵)
20	19	raleqdv 3325	. . . . 5 ⊢ (𝑦 = 𝐵 → (∀𝑧 ∈ 𝒫 𝑦(𝑂‘𝑧) ≤ (𝑂‘𝑦) ↔ ∀𝑧 ∈ 𝒫 𝐵(𝑂‘𝑧) ≤ (𝑂‘𝑦)))
21		fveq2 6905	. . . . . . 7 ⊢ (𝑦 = 𝐵 → (𝑂‘𝑦) = (𝑂‘𝐵))
22	21	breq2d 5154	. . . . . 6 ⊢ (𝑦 = 𝐵 → ((𝑂‘𝑧) ≤ (𝑂‘𝑦) ↔ (𝑂‘𝑧) ≤ (𝑂‘𝐵)))
23	22	ralbidv 3177	. . . . 5 ⊢ (𝑦 = 𝐵 → (∀𝑧 ∈ 𝒫 𝐵(𝑂‘𝑧) ≤ (𝑂‘𝑦) ↔ ∀𝑧 ∈ 𝒫 𝐵(𝑂‘𝑧) ≤ (𝑂‘𝐵)))
24	20, 23	bitrd 279	. . . 4 ⊢ (𝑦 = 𝐵 → (∀𝑧 ∈ 𝒫 𝑦(𝑂‘𝑧) ≤ (𝑂‘𝑦) ↔ ∀𝑧 ∈ 𝒫 𝐵(𝑂‘𝑧) ≤ (𝑂‘𝐵)))
25	24	rspcva 3619	. . 3 ⊢ ((𝐵 ∈ 𝒫 ∪ dom 𝑂 ∧ ∀𝑦 ∈ 𝒫 ∪ dom 𝑂∀𝑧 ∈ 𝒫 𝑦(𝑂‘𝑧) ≤ (𝑂‘𝑦)) → ∀𝑧 ∈ 𝒫 𝐵(𝑂‘𝑧) ≤ (𝑂‘𝐵))
26	14, 18, 25	syl2anc 584	. 2 ⊢ (𝜑 → ∀𝑧 ∈ 𝒫 𝐵(𝑂‘𝑧) ≤ (𝑂‘𝐵))
27		fveq2 6905	. . . 4 ⊢ (𝑧 = 𝐴 → (𝑂‘𝑧) = (𝑂‘𝐴))
28	27	breq1d 5152	. . 3 ⊢ (𝑧 = 𝐴 → ((𝑂‘𝑧) ≤ (𝑂‘𝐵) ↔ (𝑂‘𝐴) ≤ (𝑂‘𝐵)))
29	28	rspcva 3619	. 2 ⊢ ((𝐴 ∈ 𝒫 𝐵 ∧ ∀𝑧 ∈ 𝒫 𝐵(𝑂‘𝑧) ≤ (𝑂‘𝐵)) → (𝑂‘𝐴) ≤ (𝑂‘𝐵))
30	10, 26, 29	syl2anc 584	1 ⊢ (𝜑 → (𝑂‘𝐴) ≤ (𝑂‘𝐵))

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   = wceq 1539   ∈ wcel 2107  ∀wral 3060  Vcvv 3479   ⊆ wss 3950  ∅c0 4332  𝒫 cpw 4599  ∪ cuni 4906   class class class wbr 5142  dom cdm 5684   ↾ cres 5686  ⟶wf 6556  ‘cfv 6560  (class class class)co 7432  ωcom 7888   ≼ cdom 8984  0cc0 11156  +∞cpnf 11293   ≤ cle 11297  [,]cicc 13391  Σ^{^}csumge0 46382  OutMeascome 46509

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1794  ax-4 1808  ax-5 1909  ax-6 1966  ax-7 2006  ax-8 2109  ax-9 2117  ax-ext 2707  ax-sep 5295  ax-nul 5305  ax-pr 5431  ax-un 7756

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1779  df-sb 2064  df-clab 2714  df-cleq 2728  df-clel 2815  df-ral 3061  df-rex 3070  df-rab 3436  df-v 3481  df-dif 3953  df-un 3955  df-in 3957  df-ss 3967  df-nul 4333  df-if 4525  df-pw 4601  df-sn 4626  df-pr 4628  df-op 4632  df-uni 4907  df-br 5143  df-opab 5205  df-rel 5691  df-cnv 5692  df-co 5693  df-dm 5694  df-rn 5695  df-res 5696  df-iota 6513  df-fun 6562  df-fn 6563  df-f 6564  df-fv 6568  df-ome 46510

This theorem is referenced by:  omessre  46530  omeiunltfirp  46539  carageniuncllem2  46542  caratheodorylem2  46547  omess0  46554  caragencmpl  46555