MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  ovoliun2 Structured version   Visualization version   GIF version

Theorem ovoliun2 22998
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 22997.) (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 22997 . 2 (𝜑 → (vol*‘ 𝑛 ∈ ℕ 𝐴) ≤ sup(ran 𝑇, ℝ*, < ))
6 nnuz 11555 . . . . . . . 8 ℕ = (ℤ‘1)
7 1zzd 11241 . . . . . . . 8 (𝜑 → 1 ∈ ℤ)
8 fvex 6098 . . . . . . . . . . 11 (vol*‘𝑚 / 𝑛𝐴) ∈ V
9 nfcv 2750 . . . . . . . . . . . . . 14 𝑚(vol*‘𝐴)
10 nfcv 2750 . . . . . . . . . . . . . . 15 𝑛vol*
11 nfcsb1v 3514 . . . . . . . . . . . . . . 15 𝑛𝑚 / 𝑛𝐴
1210, 11nffv 6095 . . . . . . . . . . . . . 14 𝑛(vol*‘𝑚 / 𝑛𝐴)
13 csbeq1a 3507 . . . . . . . . . . . . . . 15 (𝑛 = 𝑚𝐴 = 𝑚 / 𝑛𝐴)
1413fveq2d 6092 . . . . . . . . . . . . . 14 (𝑛 = 𝑚 → (vol*‘𝐴) = (vol*‘𝑚 / 𝑛𝐴))
159, 12, 14cbvmpt 4671 . . . . . . . . . . . . 13 (𝑛 ∈ ℕ ↦ (vol*‘𝐴)) = (𝑚 ∈ ℕ ↦ (vol*‘𝑚 / 𝑛𝐴))
162, 15eqtri 2631 . . . . . . . . . . . 12 𝐺 = (𝑚 ∈ ℕ ↦ (vol*‘𝑚 / 𝑛𝐴))
1716fvmpt2 6185 . . . . . . . . . . 11 ((𝑚 ∈ ℕ ∧ (vol*‘𝑚 / 𝑛𝐴) ∈ V) → (𝐺𝑚) = (vol*‘𝑚 / 𝑛𝐴))
188, 17mpan2 702 . . . . . . . . . 10 (𝑚 ∈ ℕ → (𝐺𝑚) = (vol*‘𝑚 / 𝑛𝐴))
1918adantl 480 . . . . . . . . 9 ((𝜑𝑚 ∈ ℕ) → (𝐺𝑚) = (vol*‘𝑚 / 𝑛𝐴))
204ralrimiva 2948 . . . . . . . . . . 11 (𝜑 → ∀𝑛 ∈ ℕ (vol*‘𝐴) ∈ ℝ)
219nfel1 2764 . . . . . . . . . . . 12 𝑚(vol*‘𝐴) ∈ ℝ
2212nfel1 2764 . . . . . . . . . . . 12 𝑛(vol*‘𝑚 / 𝑛𝐴) ∈ ℝ
2314eleq1d 2671 . . . . . . . . . . . 12 (𝑛 = 𝑚 → ((vol*‘𝐴) ∈ ℝ ↔ (vol*‘𝑚 / 𝑛𝐴) ∈ ℝ))
2421, 22, 23cbvral 3142 . . . . . . . . . . 11 (∀𝑛 ∈ ℕ (vol*‘𝐴) ∈ ℝ ↔ ∀𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴) ∈ ℝ)
2520, 24sylib 206 . . . . . . . . . 10 (𝜑 → ∀𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴) ∈ ℝ)
2625r19.21bi 2915 . . . . . . . . 9 ((𝜑𝑚 ∈ ℕ) → (vol*‘𝑚 / 𝑛𝐴) ∈ ℝ)
2719, 26eqeltrd 2687 . . . . . . . 8 ((𝜑𝑚 ∈ ℕ) → (𝐺𝑚) ∈ ℝ)
286, 7, 27serfre 12647 . . . . . . 7 (𝜑 → seq1( + , 𝐺):ℕ⟶ℝ)
291feq1i 5935 . . . . . . 7 (𝑇:ℕ⟶ℝ ↔ seq1( + , 𝐺):ℕ⟶ℝ)
3028, 29sylibr 222 . . . . . 6 (𝜑𝑇:ℕ⟶ℝ)
31 frn 5952 . . . . . 6 (𝑇:ℕ⟶ℝ → ran 𝑇 ⊆ ℝ)
3230, 31syl 17 . . . . 5 (𝜑 → ran 𝑇 ⊆ ℝ)
33 1nn 10878 . . . . . . . 8 1 ∈ ℕ
34 fdm 5950 . . . . . . . . 9 (𝑇:ℕ⟶ℝ → dom 𝑇 = ℕ)
3530, 34syl 17 . . . . . . . 8 (𝜑 → dom 𝑇 = ℕ)
3633, 35syl5eleqr 2694 . . . . . . 7 (𝜑 → 1 ∈ dom 𝑇)
37 ne0i 3879 . . . . . . 7 (1 ∈ dom 𝑇 → dom 𝑇 ≠ ∅)
3836, 37syl 17 . . . . . 6 (𝜑 → dom 𝑇 ≠ ∅)
39 dm0rn0 5250 . . . . . . 7 (dom 𝑇 = ∅ ↔ ran 𝑇 = ∅)
4039necon3bii 2833 . . . . . 6 (dom 𝑇 ≠ ∅ ↔ ran 𝑇 ≠ ∅)
4138, 40sylib 206 . . . . 5 (𝜑 → ran 𝑇 ≠ ∅)
42 ovoliun2.t . . . . . . . . 9 (𝜑𝑇 ∈ dom ⇝ )
431, 42syl5eqelr 2692 . . . . . . . 8 (𝜑 → seq1( + , 𝐺) ∈ dom ⇝ )
446, 7, 19, 26, 43isumrecl 14284 . . . . . . 7 (𝜑 → Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴) ∈ ℝ)
45 elfznn 12196 . . . . . . . . . . . . 13 (𝑚 ∈ (1...𝑘) → 𝑚 ∈ ℕ)
4645adantl 480 . . . . . . . . . . . 12 (((𝜑𝑘 ∈ ℕ) ∧ 𝑚 ∈ (1...𝑘)) → 𝑚 ∈ ℕ)
4746, 18syl 17 . . . . . . . . . . 11 (((𝜑𝑘 ∈ ℕ) ∧ 𝑚 ∈ (1...𝑘)) → (𝐺𝑚) = (vol*‘𝑚 / 𝑛𝐴))
48 simpr 475 . . . . . . . . . . . 12 ((𝜑𝑘 ∈ ℕ) → 𝑘 ∈ ℕ)
4948, 6syl6eleq 2697 . . . . . . . . . . 11 ((𝜑𝑘 ∈ ℕ) → 𝑘 ∈ (ℤ‘1))
50 simpl 471 . . . . . . . . . . . . 13 ((𝜑𝑘 ∈ ℕ) → 𝜑)
5150, 45, 26syl2an 492 . . . . . . . . . . . 12 (((𝜑𝑘 ∈ ℕ) ∧ 𝑚 ∈ (1...𝑘)) → (vol*‘𝑚 / 𝑛𝐴) ∈ ℝ)
5251recnd 9924 . . . . . . . . . . 11 (((𝜑𝑘 ∈ ℕ) ∧ 𝑚 ∈ (1...𝑘)) → (vol*‘𝑚 / 𝑛𝐴) ∈ ℂ)
5347, 49, 52fsumser 14254 . . . . . . . . . 10 ((𝜑𝑘 ∈ ℕ) → Σ𝑚 ∈ (1...𝑘)(vol*‘𝑚 / 𝑛𝐴) = (seq1( + , 𝐺)‘𝑘))
541fveq1i 6089 . . . . . . . . . 10 (𝑇𝑘) = (seq1( + , 𝐺)‘𝑘)
5553, 54syl6eqr 2661 . . . . . . . . 9 ((𝜑𝑘 ∈ ℕ) → Σ𝑚 ∈ (1...𝑘)(vol*‘𝑚 / 𝑛𝐴) = (𝑇𝑘))
56 fzfid 12589 . . . . . . . . . . 11 (𝜑 → (1...𝑘) ∈ Fin)
57 elfznn 12196 . . . . . . . . . . . . 13 (𝑛 ∈ (1...𝑘) → 𝑛 ∈ ℕ)
5857ssriv 3571 . . . . . . . . . . . 12 (1...𝑘) ⊆ ℕ
5958a1i 11 . . . . . . . . . . 11 (𝜑 → (1...𝑘) ⊆ ℕ)
603ralrimiva 2948 . . . . . . . . . . . . . 14 (𝜑 → ∀𝑛 ∈ ℕ 𝐴 ⊆ ℝ)
61 nfv 1829 . . . . . . . . . . . . . . 15 𝑚 𝐴 ⊆ ℝ
62 nfcv 2750 . . . . . . . . . . . . . . . 16 𝑛
6311, 62nfss 3560 . . . . . . . . . . . . . . 15 𝑛𝑚 / 𝑛𝐴 ⊆ ℝ
6413sseq1d 3594 . . . . . . . . . . . . . . 15 (𝑛 = 𝑚 → (𝐴 ⊆ ℝ ↔ 𝑚 / 𝑛𝐴 ⊆ ℝ))
6561, 63, 64cbvral 3142 . . . . . . . . . . . . . 14 (∀𝑛 ∈ ℕ 𝐴 ⊆ ℝ ↔ ∀𝑚 ∈ ℕ 𝑚 / 𝑛𝐴 ⊆ ℝ)
6660, 65sylib 206 . . . . . . . . . . . . 13 (𝜑 → ∀𝑚 ∈ ℕ 𝑚 / 𝑛𝐴 ⊆ ℝ)
6766r19.21bi 2915 . . . . . . . . . . . 12 ((𝜑𝑚 ∈ ℕ) → 𝑚 / 𝑛𝐴 ⊆ ℝ)
68 ovolge0 22973 . . . . . . . . . . . 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 14362 . . . . . . . . . 10 (𝜑 → Σ𝑚 ∈ (1...𝑘)(vol*‘𝑚 / 𝑛𝐴) ≤ Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴))
7170adantr 479 . . . . . . . . 9 ((𝜑𝑘 ∈ ℕ) → Σ𝑚 ∈ (1...𝑘)(vol*‘𝑚 / 𝑛𝐴) ≤ Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴))
7255, 71eqbrtrrd 4601 . . . . . . . 8 ((𝜑𝑘 ∈ ℕ) → (𝑇𝑘) ≤ Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴))
7372ralrimiva 2948 . . . . . . 7 (𝜑 → ∀𝑘 ∈ ℕ (𝑇𝑘) ≤ Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴))
74 breq2 4581 . . . . . . . . 9 (𝑥 = Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴) → ((𝑇𝑘) ≤ 𝑥 ↔ (𝑇𝑘) ≤ Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴)))
7574ralbidv 2968 . . . . . . . 8 (𝑥 = Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴) → (∀𝑘 ∈ ℕ (𝑇𝑘) ≤ 𝑥 ↔ ∀𝑘 ∈ ℕ (𝑇𝑘) ≤ Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴)))
7675rspcev 3281 . . . . . . 7 ((Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴) ∈ ℝ ∧ ∀𝑘 ∈ ℕ (𝑇𝑘) ≤ Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴)) → ∃𝑥 ∈ ℝ ∀𝑘 ∈ ℕ (𝑇𝑘) ≤ 𝑥)
7744, 73, 76syl2anc 690 . . . . . 6 (𝜑 → ∃𝑥 ∈ ℝ ∀𝑘 ∈ ℕ (𝑇𝑘) ≤ 𝑥)
78 ffn 5944 . . . . . . . . 9 (𝑇:ℕ⟶ℝ → 𝑇 Fn ℕ)
7930, 78syl 17 . . . . . . . 8 (𝜑𝑇 Fn ℕ)
80 breq1 4580 . . . . . . . . 9 (𝑧 = (𝑇𝑘) → (𝑧𝑥 ↔ (𝑇𝑘) ≤ 𝑥))
8180ralrn 6255 . . . . . . . 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 3033 . . . . . 6 (𝜑 → (∃𝑥 ∈ ℝ ∀𝑧 ∈ ran 𝑇 𝑧𝑥 ↔ ∃𝑥 ∈ ℝ ∀𝑘 ∈ ℕ (𝑇𝑘) ≤ 𝑥))
8477, 83mpbird 245 . . . . 5 (𝜑 → ∃𝑥 ∈ ℝ ∀𝑧 ∈ ran 𝑇 𝑧𝑥)
85 supxrre 11985 . . . . 5 ((ran 𝑇 ⊆ ℝ ∧ ran 𝑇 ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑧 ∈ ran 𝑇 𝑧𝑥) → sup(ran 𝑇, ℝ*, < ) = sup(ran 𝑇, ℝ, < ))
8632, 41, 84, 85syl3anc 1317 . . . 4 (𝜑 → sup(ran 𝑇, ℝ*, < ) = sup(ran 𝑇, ℝ, < ))
876, 1, 7, 19, 26, 69, 77isumsup 14364 . . . 4 (𝜑 → Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴) = sup(ran 𝑇, ℝ, < ))
8886, 87eqtr4d 2646 . . 3 (𝜑 → sup(ran 𝑇, ℝ*, < ) = Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴))
899, 12, 14cbvsumi 14221 . . 3 Σ𝑛 ∈ ℕ (vol*‘𝐴) = Σ𝑚 ∈ ℕ (vol*‘𝑚 / 𝑛𝐴)
9088, 89syl6eqr 2661 . 2 (𝜑 → sup(ran 𝑇, ℝ*, < ) = Σ𝑛 ∈ ℕ (vol*‘𝐴))
915, 90breqtrd 4603 1 (𝜑 → (vol*‘ 𝑛 ∈ ℕ 𝐴) ≤ Σ𝑛 ∈ ℕ (vol*‘𝐴))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 194  wa 382   = wceq 1474  wcel 1976  wne 2779  wral 2895  wrex 2896  Vcvv 3172  csb 3498  wss 3539  c0 3873   ciun 4449   class class class wbr 4577  cmpt 4637  dom cdm 5028  ran crn 5029   Fn wfn 5785  wf 5786  cfv 5790  (class class class)co 6527  supcsup 8206  cr 9791  0cc0 9792  1c1 9793   + caddc 9795  *cxr 9929   < clt 9930  cle 9931  cn 10867  cuz 11519  ...cfz 12152  seqcseq 12618  cli 14009  Σcsu 14210  vol*covol 22955
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1712  ax-4 1727  ax-5 1826  ax-6 1874  ax-7 1921  ax-8 1978  ax-9 1985  ax-10 2005  ax-11 2020  ax-12 2032  ax-13 2232  ax-ext 2589  ax-rep 4693  ax-sep 4703  ax-nul 4712  ax-pow 4764  ax-pr 4828  ax-un 6824  ax-inf2 8398  ax-cc 9117  ax-cnex 9848  ax-resscn 9849  ax-1cn 9850  ax-icn 9851  ax-addcl 9852  ax-addrcl 9853  ax-mulcl 9854  ax-mulrcl 9855  ax-mulcom 9856  ax-addass 9857  ax-mulass 9858  ax-distr 9859  ax-i2m1 9860  ax-1ne0 9861  ax-1rid 9862  ax-rnegex 9863  ax-rrecex 9864  ax-cnre 9865  ax-pre-lttri 9866  ax-pre-lttrn 9867  ax-pre-ltadd 9868  ax-pre-mulgt0 9869  ax-pre-sup 9870
This theorem depends on definitions:  df-bi 195  df-or 383  df-an 384  df-3or 1031  df-3an 1032  df-tru 1477  df-fal 1480  df-ex 1695  df-nf 1700  df-sb 1867  df-eu 2461  df-mo 2462  df-clab 2596  df-cleq 2602  df-clel 2605  df-nfc 2739  df-ne 2781  df-nel 2782  df-ral 2900  df-rex 2901  df-reu 2902  df-rmo 2903  df-rab 2904  df-v 3174  df-sbc 3402  df-csb 3499  df-dif 3542  df-un 3544  df-in 3546  df-ss 3553  df-pss 3555  df-nul 3874  df-if 4036  df-pw 4109  df-sn 4125  df-pr 4127  df-tp 4129  df-op 4131  df-uni 4367  df-int 4405  df-iun 4451  df-br 4578  df-opab 4638  df-mpt 4639  df-tr 4675  df-eprel 4939  df-id 4943  df-po 4949  df-so 4950  df-fr 4987  df-se 4988  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-isom 5799  df-riota 6489  df-ov 6530  df-oprab 6531  df-mpt2 6532  df-om 6935  df-1st 7036  df-2nd 7037  df-wrecs 7271  df-recs 7332  df-rdg 7370  df-1o 7424  df-oadd 7428  df-er 7606  df-map 7723  df-pm 7724  df-en 7819  df-dom 7820  df-sdom 7821  df-fin 7822  df-sup 8208  df-inf 8209  df-oi 8275  df-card 8625  df-pnf 9932  df-mnf 9933  df-xr 9934  df-ltxr 9935  df-le 9936  df-sub 10119  df-neg 10120  df-div 10534  df-nn 10868  df-2 10926  df-3 10927  df-n0 11140  df-z 11211  df-uz 11520  df-q 11621  df-rp 11665  df-ioo 12006  df-ico 12008  df-fz 12153  df-fzo 12290  df-fl 12410  df-seq 12619  df-exp 12678  df-hash 12935  df-cj 13633  df-re 13634  df-im 13635  df-sqrt 13769  df-abs 13770  df-clim 14013  df-rlim 14014  df-sum 14211  df-ovol 22957
This theorem is referenced by:  ovoliunnul  22999  vitalilem5  23104
  Copyright terms: Public domain W3C validator