Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > mbflimlem | Structured version Visualization version GIF version |
Description: The pointwise limit of a sequence of measurable real-valued functions is measurable. (Contributed by Mario Carneiro, 7-Sep-2014.) |
Ref | Expression |
---|---|
mbflim.1 | ⊢ 𝑍 = (ℤ≥‘𝑀) |
mbflim.2 | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
mbflim.4 | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝑛 ∈ 𝑍 ↦ 𝐵) ⇝ 𝐶) |
mbflim.5 | ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ MblFn) |
mbflimlem.6 | ⊢ ((𝜑 ∧ (𝑛 ∈ 𝑍 ∧ 𝑥 ∈ 𝐴)) → 𝐵 ∈ ℝ) |
Ref | Expression |
---|---|
mbflimlem | ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐶) ∈ MblFn) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mbflim.1 | . . . . 5 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
2 | mbflimlem.6 | . . . . . . 7 ⊢ ((𝜑 ∧ (𝑛 ∈ 𝑍 ∧ 𝑥 ∈ 𝐴)) → 𝐵 ∈ ℝ) | |
3 | 2 | anass1rs 653 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑛 ∈ 𝑍) → 𝐵 ∈ ℝ) |
4 | 3 | fmpttd 7050 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝑛 ∈ 𝑍 ↦ 𝐵):𝑍⟶ℝ) |
5 | mbflim.2 | . . . . . . 7 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
6 | 5 | adantr 482 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑀 ∈ ℤ) |
7 | mbflim.4 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝑛 ∈ 𝑍 ↦ 𝐵) ⇝ 𝐶) | |
8 | climrel 15301 | . . . . . . . 8 ⊢ Rel ⇝ | |
9 | 8 | releldmi 5894 | . . . . . . 7 ⊢ ((𝑛 ∈ 𝑍 ↦ 𝐵) ⇝ 𝐶 → (𝑛 ∈ 𝑍 ↦ 𝐵) ∈ dom ⇝ ) |
10 | 7, 9 | syl 17 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝑛 ∈ 𝑍 ↦ 𝐵) ∈ dom ⇝ ) |
11 | 1 | climcau 15482 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ (𝑛 ∈ 𝑍 ↦ 𝐵) ∈ dom ⇝ ) → ∀𝑦 ∈ ℝ+ ∃𝑘 ∈ 𝑍 ∀𝑗 ∈ (ℤ≥‘𝑘)(abs‘(((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑗) − ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘))) < 𝑦) |
12 | 6, 10, 11 | syl2anc 585 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∀𝑦 ∈ ℝ+ ∃𝑘 ∈ 𝑍 ∀𝑗 ∈ (ℤ≥‘𝑘)(abs‘(((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑗) − ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘))) < 𝑦) |
13 | 1, 4, 12 | caurcvg 15488 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝑛 ∈ 𝑍 ↦ 𝐵) ⇝ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵))) |
14 | climuni 15361 | . . . 4 ⊢ (((𝑛 ∈ 𝑍 ↦ 𝐵) ⇝ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ∧ (𝑛 ∈ 𝑍 ↦ 𝐵) ⇝ 𝐶) → (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) = 𝐶) | |
15 | 13, 7, 14 | syl2anc 585 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) = 𝐶) |
16 | 15 | mpteq2dva 5197 | . 2 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵))) = (𝑥 ∈ 𝐴 ↦ 𝐶)) |
17 | eqid 2737 | . . 3 ⊢ (𝑥 ∈ 𝐴 ↦ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵))) = (𝑥 ∈ 𝐴 ↦ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵))) | |
18 | eqid 2737 | . . 3 ⊢ (𝑚 ∈ ℝ ↦ sup((((𝑛 ∈ 𝑍 ↦ 𝐵) “ (𝑚[,)+∞)) ∩ ℝ*), ℝ*, < )) = (𝑚 ∈ ℝ ↦ sup((((𝑛 ∈ 𝑍 ↦ 𝐵) “ (𝑚[,)+∞)) ∩ ℝ*), ℝ*, < )) | |
19 | 4 | ffvelcdmda 7022 | . . . 4 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑘 ∈ 𝑍) → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ∈ ℝ) |
20 | 1, 6, 13, 19 | climrecl 15392 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ∈ ℝ) |
21 | mbflim.5 | . . 3 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ MblFn) | |
22 | 1, 17, 18, 5, 20, 21, 2 | mbflimsup 24936 | . 2 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵))) ∈ MblFn) |
23 | 16, 22 | eqeltrrd 2839 | 1 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐶) ∈ MblFn) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 397 = wceq 1541 ∈ wcel 2106 ∀wral 3062 ∃wrex 3071 ∩ cin 3901 class class class wbr 5097 ↦ cmpt 5180 dom cdm 5625 “ cima 5628 ‘cfv 6484 (class class class)co 7342 supcsup 9302 ℝcr 10976 +∞cpnf 11112 ℝ*cxr 11114 < clt 11115 − cmin 11311 ℤcz 12425 ℤ≥cuz 12688 ℝ+crp 12836 [,)cico 13187 abscabs 15045 lim supclsp 15279 ⇝ cli 15293 MblFncmbf 24884 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2708 ax-rep 5234 ax-sep 5248 ax-nul 5255 ax-pow 5313 ax-pr 5377 ax-un 7655 ax-inf2 9503 ax-cc 10297 ax-cnex 11033 ax-resscn 11034 ax-1cn 11035 ax-icn 11036 ax-addcl 11037 ax-addrcl 11038 ax-mulcl 11039 ax-mulrcl 11040 ax-mulcom 11041 ax-addass 11042 ax-mulass 11043 ax-distr 11044 ax-i2m1 11045 ax-1ne0 11046 ax-1rid 11047 ax-rnegex 11048 ax-rrecex 11049 ax-cnre 11050 ax-pre-lttri 11051 ax-pre-lttrn 11052 ax-pre-ltadd 11053 ax-pre-mulgt0 11054 ax-pre-sup 11055 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2815 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3350 df-reu 3351 df-rab 3405 df-v 3444 df-sbc 3732 df-csb 3848 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3921 df-nul 4275 df-if 4479 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4858 df-int 4900 df-iun 4948 df-disj 5063 df-br 5098 df-opab 5160 df-mpt 5181 df-tr 5215 df-id 5523 df-eprel 5529 df-po 5537 df-so 5538 df-fr 5580 df-se 5581 df-we 5582 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6243 df-ord 6310 df-on 6311 df-lim 6312 df-suc 6313 df-iota 6436 df-fun 6486 df-fn 6487 df-f 6488 df-f1 6489 df-fo 6490 df-f1o 6491 df-fv 6492 df-isom 6493 df-riota 7298 df-ov 7345 df-oprab 7346 df-mpo 7347 df-of 7600 df-om 7786 df-1st 7904 df-2nd 7905 df-frecs 8172 df-wrecs 8203 df-recs 8277 df-rdg 8316 df-1o 8372 df-2o 8373 df-oadd 8376 df-omul 8377 df-er 8574 df-map 8693 df-pm 8694 df-en 8810 df-dom 8811 df-sdom 8812 df-fin 8813 df-sup 9304 df-inf 9305 df-oi 9372 df-dju 9763 df-card 9801 df-acn 9804 df-pnf 11117 df-mnf 11118 df-xr 11119 df-ltxr 11120 df-le 11121 df-sub 11313 df-neg 11314 df-div 11739 df-nn 12080 df-2 12142 df-3 12143 df-n0 12340 df-z 12426 df-uz 12689 df-q 12795 df-rp 12837 df-xadd 12955 df-ioo 13189 df-ioc 13190 df-ico 13191 df-icc 13192 df-fz 13346 df-fzo 13489 df-fl 13618 df-seq 13828 df-exp 13889 df-hash 14151 df-cj 14910 df-re 14911 df-im 14912 df-sqrt 15046 df-abs 15047 df-limsup 15280 df-clim 15297 df-rlim 15298 df-sum 15498 df-xmet 20696 df-met 20697 df-ovol 24734 df-vol 24735 df-mbf 24889 |
This theorem is referenced by: mbflim 24938 |
Copyright terms: Public domain | W3C validator |