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Theorem ovoliun2 23320
 Description: The Lebesgue outer measure function is countably sub-additive. (This version is a little easier to read, but does not allow infinite values like ovoliun 23319.) (Contributed by Mario Carneiro, 12-Jun-2014.)
Hypotheses
Ref Expression
ovoliun.t 𝑇 = seq1( + , 𝐺)
ovoliun.g 𝐺 = (𝑛 ∈ ℕ ↦ (vol*‘𝐴))
ovoliun.a ((𝜑𝑛 ∈ ℕ) → 𝐴 ⊆ ℝ)
ovoliun.v ((𝜑𝑛 ∈ ℕ) → (vol*‘𝐴) ∈ ℝ)
ovoliun2.t (𝜑𝑇 ∈ dom ⇝ )
Assertion
Ref Expression
ovoliun2 (𝜑 → (vol*‘ 𝑛 ∈ ℕ 𝐴) ≤ Σ𝑛 ∈ ℕ (vol*‘𝐴))
Distinct variable group:   𝜑,𝑛
Allowed substitution hints:   𝐴(𝑛)   𝑇(𝑛)   𝐺(𝑛)

Proof of Theorem ovoliun2
Dummy variables 𝑘 𝑚 𝑥 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ovoliun.t . . 3 𝑇 = seq1( + , 𝐺)
2 ovoliun.g . . 3 𝐺 = (𝑛 ∈ ℕ ↦ (vol*‘𝐴))
3 ovoliun.a . . 3 ((𝜑𝑛 ∈ ℕ) → 𝐴 ⊆ ℝ)
4 ovoliun.v . . 3 ((𝜑𝑛 ∈ ℕ) → (vol*‘𝐴) ∈ ℝ)
51, 2, 3, 4ovoliun 23319 . 2 (𝜑 → (vol*‘ 𝑛 ∈ ℕ 𝐴) ≤ sup(ran 𝑇, ℝ*, < ))
6 nnuz 11761 . . . . . . . 8 ℕ = (ℤ‘1)
7 1zzd 11446 . . . . . . . 8 (𝜑 → 1 ∈ ℤ)
8 fvex 6239 . . . . . . . . . . 11 (vol*‘𝑚 / 𝑛𝐴) ∈ V
9 nfcv 2793 . . . . . . . . . . . . . 14 𝑚(vol*‘𝐴)
10 nfcv 2793 . . . . . . . . . . . . . . 15 𝑛vol*
11 nfcsb1v 3582 . . . . . . . . . . . . . . 15 𝑛𝑚 / 𝑛𝐴
1210, 11nffv 6236 . . . . . . . . . . . . . 14 𝑛(vol*‘𝑚 / 𝑛𝐴)
13 csbeq1a 3575 . . . . . . . . . . . . . . 15 (𝑛 = 𝑚𝐴 = 𝑚 / 𝑛𝐴)
1413fveq2d 6233 . . . . . . . . . . . . . 14 (𝑛 = 𝑚 → (vol*‘𝐴) = (vol*‘𝑚 / 𝑛𝐴))
159, 12, 14cbvmpt 4782 . . . . . . . . . . . . 13 (𝑛 ∈ ℕ ↦ (vol*‘𝐴)) = (𝑚 ∈ ℕ ↦ (vol*‘𝑚 / 𝑛𝐴))
162, 15eqtri 2673 . . . . . . . . . . . 12 𝐺 = (𝑚 ∈ ℕ ↦ (vol*‘𝑚 / 𝑛𝐴))
1716fvmpt2 6330 . . . . . . . . . . 11 ((𝑚 ∈ ℕ ∧ (vol*‘𝑚 / 𝑛𝐴) ∈ V) → (𝐺𝑚) = (vol*‘𝑚 / 𝑛𝐴))
188, 17mpan2 707 . . . . . . . . . 10 (𝑚 ∈ ℕ → (𝐺𝑚) = (vol*‘𝑚 / 𝑛𝐴))
1918adantl 481 . . . . . . . . 9 ((𝜑𝑚 ∈ ℕ) → (𝐺𝑚) = (vol*‘𝑚 / 𝑛𝐴))
204ralrimiva 2995 . . . . . . . . . . 11 (𝜑 → ∀𝑛 ∈ ℕ (vol*‘𝐴) ∈ ℝ)
219nfel1 2808 . . . . . . . . . . . 12 𝑚(vol*‘𝐴) ∈ ℝ
2212nfel1 2808 . . . . . . . . . . . 12 𝑛(vol*‘𝑚 / 𝑛𝐴) ∈ ℝ
2314eleq1d 2715 . . . . . . . . . . . 12 (𝑛 = 𝑚 → ((vol*‘𝐴) ∈ ℝ ↔ (vol*‘𝑚 / 𝑛𝐴) ∈ ℝ))
2421, 22, 23cbvral 3197 . . . . . . . . . . 11 (∀𝑛 ∈ ℕ (vol*‘𝐴) ∈ ℝ ↔ ∀𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴) ∈ ℝ)
2520, 24sylib 208 . . . . . . . . . 10 (𝜑 → ∀𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴) ∈ ℝ)
2625r19.21bi 2961 . . . . . . . . 9 ((𝜑𝑚 ∈ ℕ) → (vol*‘𝑚 / 𝑛𝐴) ∈ ℝ)
2719, 26eqeltrd 2730 . . . . . . . 8 ((𝜑𝑚 ∈ ℕ) → (𝐺𝑚) ∈ ℝ)
286, 7, 27serfre 12870 . . . . . . 7 (𝜑 → seq1( + , 𝐺):ℕ⟶ℝ)
291feq1i 6074 . . . . . . 7 (𝑇:ℕ⟶ℝ ↔ seq1( + , 𝐺):ℕ⟶ℝ)
3028, 29sylibr 224 . . . . . 6 (𝜑𝑇:ℕ⟶ℝ)
31 frn 6091 . . . . . 6 (𝑇:ℕ⟶ℝ → ran 𝑇 ⊆ ℝ)
3230, 31syl 17 . . . . 5 (𝜑 → ran 𝑇 ⊆ ℝ)
33 1nn 11069 . . . . . . . 8 1 ∈ ℕ
34 fdm 6089 . . . . . . . . 9 (𝑇:ℕ⟶ℝ → dom 𝑇 = ℕ)
3530, 34syl 17 . . . . . . . 8 (𝜑 → dom 𝑇 = ℕ)
3633, 35syl5eleqr 2737 . . . . . . 7 (𝜑 → 1 ∈ dom 𝑇)
37 ne0i 3954 . . . . . . 7 (1 ∈ dom 𝑇 → dom 𝑇 ≠ ∅)
3836, 37syl 17 . . . . . 6 (𝜑 → dom 𝑇 ≠ ∅)
39 dm0rn0 5374 . . . . . . 7 (dom 𝑇 = ∅ ↔ ran 𝑇 = ∅)
4039necon3bii 2875 . . . . . 6 (dom 𝑇 ≠ ∅ ↔ ran 𝑇 ≠ ∅)
4138, 40sylib 208 . . . . 5 (𝜑 → ran 𝑇 ≠ ∅)
42 ovoliun2.t . . . . . . . . 9 (𝜑𝑇 ∈ dom ⇝ )
431, 42syl5eqelr 2735 . . . . . . . 8 (𝜑 → seq1( + , 𝐺) ∈ dom ⇝ )
446, 7, 19, 26, 43isumrecl 14540 . . . . . . 7 (𝜑 → Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴) ∈ ℝ)
45 elfznn 12408 . . . . . . . . . . . . 13 (𝑚 ∈ (1...𝑘) → 𝑚 ∈ ℕ)
4645adantl 481 . . . . . . . . . . . 12 (((𝜑𝑘 ∈ ℕ) ∧ 𝑚 ∈ (1...𝑘)) → 𝑚 ∈ ℕ)
4746, 18syl 17 . . . . . . . . . . 11 (((𝜑𝑘 ∈ ℕ) ∧ 𝑚 ∈ (1...𝑘)) → (𝐺𝑚) = (vol*‘𝑚 / 𝑛𝐴))
48 simpr 476 . . . . . . . . . . . 12 ((𝜑𝑘 ∈ ℕ) → 𝑘 ∈ ℕ)
4948, 6syl6eleq 2740 . . . . . . . . . . 11 ((𝜑𝑘 ∈ ℕ) → 𝑘 ∈ (ℤ‘1))
50 simpl 472 . . . . . . . . . . . . 13 ((𝜑𝑘 ∈ ℕ) → 𝜑)
5150, 45, 26syl2an 493 . . . . . . . . . . . 12 (((𝜑𝑘 ∈ ℕ) ∧ 𝑚 ∈ (1...𝑘)) → (vol*‘𝑚 / 𝑛𝐴) ∈ ℝ)
5251recnd 10106 . . . . . . . . . . 11 (((𝜑𝑘 ∈ ℕ) ∧ 𝑚 ∈ (1...𝑘)) → (vol*‘𝑚 / 𝑛𝐴) ∈ ℂ)
5347, 49, 52fsumser 14505 . . . . . . . . . 10 ((𝜑𝑘 ∈ ℕ) → Σ𝑚 ∈ (1...𝑘)(vol*‘𝑚 / 𝑛𝐴) = (seq1( + , 𝐺)‘𝑘))
541fveq1i 6230 . . . . . . . . . 10 (𝑇𝑘) = (seq1( + , 𝐺)‘𝑘)
5553, 54syl6eqr 2703 . . . . . . . . 9 ((𝜑𝑘 ∈ ℕ) → Σ𝑚 ∈ (1...𝑘)(vol*‘𝑚 / 𝑛𝐴) = (𝑇𝑘))
56 fzfid 12812 . . . . . . . . . . 11 (𝜑 → (1...𝑘) ∈ Fin)
57 elfznn 12408 . . . . . . . . . . . . 13 (𝑛 ∈ (1...𝑘) → 𝑛 ∈ ℕ)
5857ssriv 3640 . . . . . . . . . . . 12 (1...𝑘) ⊆ ℕ
5958a1i 11 . . . . . . . . . . 11 (𝜑 → (1...𝑘) ⊆ ℕ)
603ralrimiva 2995 . . . . . . . . . . . . . 14 (𝜑 → ∀𝑛 ∈ ℕ 𝐴 ⊆ ℝ)
61 nfv 1883 . . . . . . . . . . . . . . 15 𝑚 𝐴 ⊆ ℝ
62 nfcv 2793 . . . . . . . . . . . . . . . 16 𝑛
6311, 62nfss 3629 . . . . . . . . . . . . . . 15 𝑛𝑚 / 𝑛𝐴 ⊆ ℝ
6413sseq1d 3665 . . . . . . . . . . . . . . 15 (𝑛 = 𝑚 → (𝐴 ⊆ ℝ ↔ 𝑚 / 𝑛𝐴 ⊆ ℝ))
6561, 63, 64cbvral 3197 . . . . . . . . . . . . . 14 (∀𝑛 ∈ ℕ 𝐴 ⊆ ℝ ↔ ∀𝑚 ∈ ℕ 𝑚 / 𝑛𝐴 ⊆ ℝ)
6660, 65sylib 208 . . . . . . . . . . . . 13 (𝜑 → ∀𝑚 ∈ ℕ 𝑚 / 𝑛𝐴 ⊆ ℝ)
6766r19.21bi 2961 . . . . . . . . . . . 12 ((𝜑𝑚 ∈ ℕ) → 𝑚 / 𝑛𝐴 ⊆ ℝ)
68 ovolge0 23295 . . . . . . . . . . . 12 (𝑚 / 𝑛𝐴 ⊆ ℝ → 0 ≤ (vol*‘𝑚 / 𝑛𝐴))
6967, 68syl 17 . . . . . . . . . . 11 ((𝜑𝑚 ∈ ℕ) → 0 ≤ (vol*‘𝑚 / 𝑛𝐴))
706, 7, 56, 59, 19, 26, 69, 43isumless 14621 . . . . . . . . . 10 (𝜑 → Σ𝑚 ∈ (1...𝑘)(vol*‘𝑚 / 𝑛𝐴) ≤ Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴))
7170adantr 480 . . . . . . . . 9 ((𝜑𝑘 ∈ ℕ) → Σ𝑚 ∈ (1...𝑘)(vol*‘𝑚 / 𝑛𝐴) ≤ Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴))
7255, 71eqbrtrrd 4709 . . . . . . . 8 ((𝜑𝑘 ∈ ℕ) → (𝑇𝑘) ≤ Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴))
7372ralrimiva 2995 . . . . . . 7 (𝜑 → ∀𝑘 ∈ ℕ (𝑇𝑘) ≤ Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴))
74 breq2 4689 . . . . . . . . 9 (𝑥 = Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴) → ((𝑇𝑘) ≤ 𝑥 ↔ (𝑇𝑘) ≤ Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴)))
7574ralbidv 3015 . . . . . . . 8 (𝑥 = Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴) → (∀𝑘 ∈ ℕ (𝑇𝑘) ≤ 𝑥 ↔ ∀𝑘 ∈ ℕ (𝑇𝑘) ≤ Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴)))
7675rspcev 3340 . . . . . . 7 ((Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴) ∈ ℝ ∧ ∀𝑘 ∈ ℕ (𝑇𝑘) ≤ Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴)) → ∃𝑥 ∈ ℝ ∀𝑘 ∈ ℕ (𝑇𝑘) ≤ 𝑥)
7744, 73, 76syl2anc 694 . . . . . 6 (𝜑 → ∃𝑥 ∈ ℝ ∀𝑘 ∈ ℕ (𝑇𝑘) ≤ 𝑥)
78 ffn 6083 . . . . . . . . 9 (𝑇:ℕ⟶ℝ → 𝑇 Fn ℕ)
7930, 78syl 17 . . . . . . . 8 (𝜑𝑇 Fn ℕ)
80 breq1 4688 . . . . . . . . 9 (𝑧 = (𝑇𝑘) → (𝑧𝑥 ↔ (𝑇𝑘) ≤ 𝑥))
8180ralrn 6402 . . . . . . . 8 (𝑇 Fn ℕ → (∀𝑧 ∈ ran 𝑇 𝑧𝑥 ↔ ∀𝑘 ∈ ℕ (𝑇𝑘) ≤ 𝑥))
8279, 81syl 17 . . . . . . 7 (𝜑 → (∀𝑧 ∈ ran 𝑇 𝑧𝑥 ↔ ∀𝑘 ∈ ℕ (𝑇𝑘) ≤ 𝑥))
8382rexbidv 3081 . . . . . 6 (𝜑 → (∃𝑥 ∈ ℝ ∀𝑧 ∈ ran 𝑇 𝑧𝑥 ↔ ∃𝑥 ∈ ℝ ∀𝑘 ∈ ℕ (𝑇𝑘) ≤ 𝑥))
8477, 83mpbird 247 . . . . 5 (𝜑 → ∃𝑥 ∈ ℝ ∀𝑧 ∈ ran 𝑇 𝑧𝑥)
85 supxrre 12195 . . . . 5 ((ran 𝑇 ⊆ ℝ ∧ ran 𝑇 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑧 ∈ ran 𝑇 𝑧𝑥) → sup(ran 𝑇, ℝ*, < ) = sup(ran 𝑇, ℝ, < ))
8632, 41, 84, 85syl3anc 1366 . . . 4 (𝜑 → sup(ran 𝑇, ℝ*, < ) = sup(ran 𝑇, ℝ, < ))
876, 1, 7, 19, 26, 69, 77isumsup 14623 . . . 4 (𝜑 → Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴) = sup(ran 𝑇, ℝ, < ))
8886, 87eqtr4d 2688 . . 3 (𝜑 → sup(ran 𝑇, ℝ*, < ) = Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴))
899, 12, 14cbvsumi 14471 . . 3 Σ𝑛 ∈ ℕ (vol*‘𝐴) = Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴)
9088, 89syl6eqr 2703 . 2 (𝜑 → sup(ran 𝑇, ℝ*, < ) = Σ𝑛 ∈ ℕ (vol*‘𝐴))
915, 90breqtrd 4711 1 (𝜑 → (vol*‘ 𝑛 ∈ ℕ 𝐴) ≤ Σ𝑛 ∈ ℕ (vol*‘𝐴))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 383   = wceq 1523   ∈ wcel 2030   ≠ wne 2823  ∀wral 2941  ∃wrex 2942  Vcvv 3231  ⦋csb 3566   ⊆ wss 3607  ∅c0 3948  ∪ ciun 4552   class class class wbr 4685   ↦ cmpt 4762  dom cdm 5143  ran crn 5144   Fn wfn 5921  ⟶wf 5922  ‘cfv 5926  (class class class)co 6690  supcsup 8387  ℝcr 9973  0cc0 9974  1c1 9975   + caddc 9977  ℝ*cxr 10111   < clt 10112   ≤ cle 10113  ℕcn 11058  ℤ≥cuz 11725  ...cfz 12364  seqcseq 12841   ⇝ cli 14259  Σcsu 14460  vol*covol 23277 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-rep 4804  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991  ax-inf2 8576  ax-cc 9295  ax-cnex 10030  ax-resscn 10031  ax-1cn 10032  ax-icn 10033  ax-addcl 10034  ax-addrcl 10035  ax-mulcl 10036  ax-mulrcl 10037  ax-mulcom 10038  ax-addass 10039  ax-mulass 10040  ax-distr 10041  ax-i2m1 10042  ax-1ne0 10043  ax-1rid 10044  ax-rnegex 10045  ax-rrecex 10046  ax-cnre 10047  ax-pre-lttri 10048  ax-pre-lttrn 10049  ax-pre-ltadd 10050  ax-pre-mulgt0 10051  ax-pre-sup 10052 This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-tru 1526  df-fal 1529  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-nel 2927  df-ral 2946  df-rex 2947  df-reu 2948  df-rmo 2949  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-pss 3623  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-tp 4215  df-op 4217  df-uni 4469  df-int 4508  df-iun 4554  df-br 4686  df-opab 4746  df-mpt 4763  df-tr 4786  df-id 5053  df-eprel 5058  df-po 5064  df-so 5065  df-fr 5102  df-se 5103  df-we 5104  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-pred 5718  df-ord 5764  df-on 5765  df-lim 5766  df-suc 5767  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-isom 5935  df-riota 6651  df-ov 6693  df-oprab 6694  df-mpt2 6695  df-om 7108  df-1st 7210  df-2nd 7211  df-wrecs 7452  df-recs 7513  df-rdg 7551  df-1o 7605  df-oadd 7609  df-er 7787  df-map 7901  df-pm 7902  df-en 7998  df-dom 7999  df-sdom 8000  df-fin 8001  df-sup 8389  df-inf 8390  df-oi 8456  df-card 8803  df-pnf 10114  df-mnf 10115  df-xr 10116  df-ltxr 10117  df-le 10118  df-sub 10306  df-neg 10307  df-div 10723  df-nn 11059  df-2 11117  df-3 11118  df-n0 11331  df-z 11416  df-uz 11726  df-q 11827  df-rp 11871  df-ioo 12217  df-ico 12219  df-fz 12365  df-fzo 12505  df-fl 12633  df-seq 12842  df-exp 12901  df-hash 13158  df-cj 13883  df-re 13884  df-im 13885  df-sqrt 14019  df-abs 14020  df-clim 14263  df-rlim 14264  df-sum 14461  df-ovol 23279 This theorem is referenced by:  ovoliunnul  23321  vitalilem5  23426
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