smfpimioompt - Mathbox for Glauco Siliprandi

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Theorem smfpimioompt 44271

Description: Given a function measurable w.r.t. to a sigma-algebra, the preimage of an open interval is in the subspace sigma-algebra induced by its domain. (Contributed by Glauco Siliprandi, 26-Jun-2021.)

**Hypotheses**
Ref	Expression
smfpimioompt.x	⊢ Ⅎ𝑥𝜑
smfpimioompt.s	⊢ (𝜑 → 𝑆 ∈ SAlg)
smfpimioompt.a	⊢ (𝜑 → 𝐴 ∈ 𝑉)
smfpimioompt.b	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ 𝑊)
smfpimioompt.m	⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ (SMblFn‘𝑆))
smfpimioompt.l	⊢ (𝜑 → 𝐿 ∈ ℝ^*)
smfpimioompt.r	⊢ (𝜑 → 𝑅 ∈ ℝ^*)

**Assertion**
Ref	Expression
smfpimioompt	⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐵 ∈ (𝐿(,)𝑅)} ∈ (𝑆 ↾_t 𝐴))

Distinct variable groups: 𝑥,𝐴 𝑥,𝐿 𝑥,𝑅 Allowed substitution hints: 𝜑(𝑥) 𝐵(𝑥) 𝑆(𝑥) 𝑉(𝑥) 𝑊(𝑥)

**Proof of Theorem smfpimioompt**
Step	Hyp	Ref	Expression
1		smfpimioompt.x	. . 3 ⊢ Ⅎ𝑥𝜑
2		smfpimioompt.l	. . 3 ⊢ (𝜑 → 𝐿 ∈ ℝ^*)
3		smfpimioompt.r	. . 3 ⊢ (𝜑 → 𝑅 ∈ ℝ^*)
4		smfpimioompt.s	. . . . . . 7 ⊢ (𝜑 → 𝑆 ∈ SAlg)
5		smfpimioompt.m	. . . . . . 7 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ (SMblFn‘𝑆))
6		eqid 2739	. . . . . . 7 ⊢ dom (𝑥 ∈ 𝐴 ↦ 𝐵) = dom (𝑥 ∈ 𝐴 ↦ 𝐵)
7	4, 5, 6	smff 44219	. . . . . 6 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵):dom (𝑥 ∈ 𝐴 ↦ 𝐵)⟶ℝ)
8		eqid 2739	. . . . . . . 8 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐵)
9		smfpimioompt.b	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ 𝑊)
10	1, 8, 9	dmmptdf 42716	. . . . . . 7 ⊢ (𝜑 → dom (𝑥 ∈ 𝐴 ↦ 𝐵) = 𝐴)
11	10	feq2d 6582	. . . . . 6 ⊢ (𝜑 → ((𝑥 ∈ 𝐴 ↦ 𝐵):dom (𝑥 ∈ 𝐴 ↦ 𝐵)⟶ℝ ↔ (𝑥 ∈ 𝐴 ↦ 𝐵):𝐴⟶ℝ))
12	7, 11	mpbid 231	. . . . 5 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵):𝐴⟶ℝ)
13	12	fvmptelrn 6981	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ ℝ)
14	13	rexrd 11009	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ ℝ^*)
15	1, 2, 3, 14	pimiooltgt 44199	. 2 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐵 ∈ (𝐿(,)𝑅)} = ({𝑥 ∈ 𝐴 ∣ 𝐵 < 𝑅} ∩ {𝑥 ∈ 𝐴 ∣ 𝐿 < 𝐵}))
16		smfpimioompt.a	. . . 4 ⊢ (𝜑 → 𝐴 ∈ 𝑉)
17		eqid 2739	. . . 4 ⊢ (𝑆 ↾_t 𝐴) = (𝑆 ↾_t 𝐴)
18	4, 16, 17	subsalsal 43852	. . 3 ⊢ (𝜑 → (𝑆 ↾_t 𝐴) ∈ SAlg)
19	1, 4, 9, 5, 3	smfpimltxrmpt 44245	. . 3 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐵 < 𝑅} ∈ (𝑆 ↾_t 𝐴))
20	1, 4, 9, 5, 2	smfpimgtxrmpt 44270	. . 3 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐿 < 𝐵} ∈ (𝑆 ↾_t 𝐴))
21	18, 19, 20	salincld 43845	. 2 ⊢ (𝜑 → ({𝑥 ∈ 𝐴 ∣ 𝐵 < 𝑅} ∩ {𝑥 ∈ 𝐴 ∣ 𝐿 < 𝐵}) ∈ (𝑆 ↾_t 𝐴))
22	15, 21	eqeltrd 2840	1 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐵 ∈ (𝐿(,)𝑅)} ∈ (𝑆 ↾_t 𝐴))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 Ⅎwnf 1789 ∈ wcel 2109 {crab 3069 ∩ cin 3890 class class class wbr 5078 ↦ cmpt 5161 dom cdm 5588 ⟶wf 6426 ‘cfv 6430 (class class class)co 7268 ℝcr 10854 ℝ^*cxr 10992 < clt 10993 (,)cioo 13061 ↾_t crest 17112 SAlgcsalg 43803 SMblFncsmblfn 44187

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1801 ax-4 1815 ax-5 1916 ax-6 1974 ax-7 2014 ax-8 2111 ax-9 2119 ax-10 2140 ax-11 2157 ax-12 2174 ax-ext 2710 ax-rep 5213 ax-sep 5226 ax-nul 5233 ax-pow 5291 ax-pr 5355 ax-un 7579 ax-inf2 9360 ax-cc 10175 ax-ac2 10203 ax-cnex 10911 ax-resscn 10912 ax-1cn 10913 ax-icn 10914 ax-addcl 10915 ax-addrcl 10916 ax-mulcl 10917 ax-mulrcl 10918 ax-mulcom 10919 ax-addass 10920 ax-mulass 10921 ax-distr 10922 ax-i2m1 10923 ax-1ne0 10924 ax-1rid 10925 ax-rnegex 10926 ax-rrecex 10927 ax-cnre 10928 ax-pre-lttri 10929 ax-pre-lttrn 10930 ax-pre-ltadd 10931 ax-pre-mulgt0 10932 ax-pre-sup 10933

This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1544 df-fal 1554 df-ex 1786 df-nf 1790 df-sb 2071 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2817 df-nfc 2890 df-ne 2945 df-nel 3051 df-ral 3070 df-rex 3071 df-reu 3072 df-rmo 3073 df-rab 3074 df-v 3432 df-sbc 3720 df-csb 3837 df-dif 3894 df-un 3896 df-in 3898 df-ss 3908 df-pss 3910 df-nul 4262 df-if 4465 df-pw 4540 df-sn 4567 df-pr 4569 df-tp 4571 df-op 4573 df-uni 4845 df-int 4885 df-iun 4931 df-iin 4932 df-br 5079 df-opab 5141 df-mpt 5162 df-tr 5196 df-id 5488 df-eprel 5494 df-po 5502 df-so 5503 df-fr 5543 df-se 5544 df-we 5545 df-xp 5594 df-rel 5595 df-cnv 5596 df-co 5597 df-dm 5598 df-rn 5599 df-res 5600 df-ima 5601 df-pred 6199 df-ord 6266 df-on 6267 df-lim 6268 df-suc 6269 df-iota 6388 df-fun 6432 df-fn 6433 df-f 6434 df-f1 6435 df-fo 6436 df-f1o 6437 df-fv 6438 df-isom 6439 df-riota 7225 df-ov 7271 df-oprab 7272 df-mpo 7273 df-om 7701 df-1st 7817 df-2nd 7818 df-frecs 8081 df-wrecs 8112 df-recs 8186 df-rdg 8225 df-1o 8281 df-er 8472 df-map 8591 df-pm 8592 df-en 8708 df-dom 8709 df-sdom 8710 df-fin 8711 df-sup 9162 df-inf 9163 df-card 9681 df-acn 9684 df-ac 9856 df-pnf 10995 df-mnf 10996 df-xr 10997 df-ltxr 10998 df-le 10999 df-sub 11190 df-neg 11191 df-div 11616 df-nn 11957 df-n0 12217 df-z 12303 df-uz 12565 df-q 12671 df-rp 12713 df-ioo 13065 df-ico 13067 df-fl 13493 df-rest 17114 df-salg 43804 df-smblfn 44188

This theorem is referenced by: smfpimioo 44272 smfresal 44273 smfrec 44274 smfmullem4 44279

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