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Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > smfinfdmmbl | Structured version Visualization version GIF version |
Description: If a countable set of sigma-measurable functions have domains in the sigma-algebra, then their infimum function has the domain in the sigma-algebra. This is the fifth statement of Proposition 121H of [Fremlin1] p. 39 . (Contributed by Glauco Siliprandi, 1-Feb-2025.) |
Ref | Expression |
---|---|
smfinfdmmbl.1 | ⊢ Ⅎ𝑛𝜑 |
smfinfdmmbl.2 | ⊢ Ⅎ𝑥𝜑 |
smfinfdmmbl.3 | ⊢ Ⅎ𝑥𝐹 |
smfinfdmmbl.4 | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
smfinfdmmbl.5 | ⊢ 𝑍 = (ℤ≥‘𝑀) |
smfinfdmmbl.6 | ⊢ (𝜑 → 𝑆 ∈ SAlg) |
smfinfdmmbl.7 | ⊢ (𝜑 → 𝐹:𝑍⟶(SMblFn‘𝑆)) |
smfinfdmmbl.8 | ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → dom (𝐹‘𝑛) ∈ 𝑆) |
smfinfdmmbl.9 | ⊢ 𝐷 = {𝑥 ∈ ∩ 𝑛 ∈ 𝑍 dom (𝐹‘𝑛) ∣ ∃𝑦 ∈ ℝ ∀𝑛 ∈ 𝑍 𝑦 ≤ ((𝐹‘𝑛)‘𝑥)} |
smfinfdmmbl.10 | ⊢ 𝐺 = (𝑥 ∈ 𝐷 ↦ inf(ran (𝑛 ∈ 𝑍 ↦ ((𝐹‘𝑛)‘𝑥)), ℝ, < )) |
Ref | Expression |
---|---|
smfinfdmmbl | ⊢ (𝜑 → dom 𝐺 ∈ 𝑆) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | smfinfdmmbl.1 | . 2 ⊢ Ⅎ𝑛𝜑 | |
2 | smfinfdmmbl.2 | . 2 ⊢ Ⅎ𝑥𝜑 | |
3 | nfv 1918 | . 2 ⊢ Ⅎ𝑚𝜑 | |
4 | smfinfdmmbl.3 | . 2 ⊢ Ⅎ𝑥𝐹 | |
5 | smfinfdmmbl.4 | . 2 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
6 | smfinfdmmbl.5 | . 2 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
7 | smfinfdmmbl.6 | . 2 ⊢ (𝜑 → 𝑆 ∈ SAlg) | |
8 | smfinfdmmbl.7 | . 2 ⊢ (𝜑 → 𝐹:𝑍⟶(SMblFn‘𝑆)) | |
9 | smfinfdmmbl.8 | . 2 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → dom (𝐹‘𝑛) ∈ 𝑆) | |
10 | smfinfdmmbl.9 | . 2 ⊢ 𝐷 = {𝑥 ∈ ∩ 𝑛 ∈ 𝑍 dom (𝐹‘𝑛) ∣ ∃𝑦 ∈ ℝ ∀𝑛 ∈ 𝑍 𝑦 ≤ ((𝐹‘𝑛)‘𝑥)} | |
11 | smfinfdmmbl.10 | . 2 ⊢ 𝐺 = (𝑥 ∈ 𝐷 ↦ inf(ran (𝑛 ∈ 𝑍 ↦ ((𝐹‘𝑛)‘𝑥)), ℝ, < )) | |
12 | eqid 2733 | . 2 ⊢ (𝑛 ∈ 𝑍 ↦ (𝑚 ∈ ℕ ↦ {𝑥 ∈ dom (𝐹‘𝑛) ∣ -𝑚 < ((𝐹‘𝑛)‘𝑥)})) = (𝑛 ∈ 𝑍 ↦ (𝑚 ∈ ℕ ↦ {𝑥 ∈ dom (𝐹‘𝑛) ∣ -𝑚 < ((𝐹‘𝑛)‘𝑥)})) | |
13 | 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 | smfinfdmmbllem 45499 | 1 ⊢ (𝜑 → dom 𝐺 ∈ 𝑆) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 397 = wceq 1542 Ⅎwnf 1786 ∈ wcel 2107 Ⅎwnfc 2884 ∀wral 3062 ∃wrex 3071 {crab 3433 ∩ ciin 4997 class class class wbr 5147 ↦ cmpt 5230 dom cdm 5675 ran crn 5676 ⟶wf 6536 ‘cfv 6540 infcinf 9432 ℝcr 11105 < clt 11244 ≤ cle 11245 -cneg 11441 ℕcn 12208 ℤcz 12554 ℤ≥cuz 12818 SAlgcsalg 44959 SMblFncsmblfn 45346 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7720 ax-inf2 9632 ax-cc 10426 ax-ac2 10454 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 ax-pre-sup 11184 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-iin 4999 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-se 5631 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7360 df-ov 7407 df-oprab 7408 df-mpo 7409 df-om 7851 df-1st 7970 df-2nd 7971 df-frecs 8261 df-wrecs 8292 df-recs 8366 df-rdg 8405 df-1o 8461 df-oadd 8465 df-omul 8466 df-er 8699 df-map 8818 df-pm 8819 df-en 8936 df-dom 8937 df-sdom 8938 df-fin 8939 df-sup 9433 df-inf 9434 df-oi 9501 df-card 9930 df-acn 9933 df-ac 10107 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-div 11868 df-nn 12209 df-n0 12469 df-z 12555 df-uz 12819 df-q 12929 df-rp 12971 df-ioo 13324 df-ico 13326 df-fl 13753 df-rest 17364 df-salg 44960 df-smblfn 45347 |
This theorem is referenced by: (None) |
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