dstfrvel - Mathbox for Thierry Arnoux

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Theorem dstfrvel 32449

Description: Elementhood of preimage maps produced by the "less than or equal to" relation. (Contributed by Thierry Arnoux, 13-Feb-2017.)

**Hypotheses**
Ref	Expression
dstfrv.1	⊢ (𝜑 → 𝑃 ∈ Prob)
dstfrv.2	⊢ (𝜑 → 𝑋 ∈ (rRndVar‘𝑃))
orvclteel.1	⊢ (𝜑 → 𝐴 ∈ ℝ)
dstfrvel.1	⊢ (𝜑 → 𝐵 ∈ ∪ dom 𝑃)
dstfrvel.2	⊢ (𝜑 → (𝑋‘𝐵) ≤ 𝐴)

**Assertion**
Ref	Expression
dstfrvel	⊢ (𝜑 → 𝐵 ∈ (𝑋∘_RV/𝑐 ≤ 𝐴))

Proof of Theorem dstfrvel Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		dstfrv.1	. . . . . 6 ⊢ (𝜑 → 𝑃 ∈ Prob)
2		dstfrv.2	. . . . . 6 ⊢ (𝜑 → 𝑋 ∈ (rRndVar‘𝑃))
3	1, 2	rrvvf 32420	. . . . 5 ⊢ (𝜑 → 𝑋:∪ dom 𝑃⟶ℝ)
4		dstfrvel.1	. . . . 5 ⊢ (𝜑 → 𝐵 ∈ ∪ dom 𝑃)
5	3, 4	ffvelrnd 6959	. . . 4 ⊢ (𝜑 → (𝑋‘𝐵) ∈ ℝ)
6		dstfrvel.2	. . . 4 ⊢ (𝜑 → (𝑋‘𝐵) ≤ 𝐴)
7		breq1 5082	. . . . 5 ⊢ (𝑥 = (𝑋‘𝐵) → (𝑥 ≤ 𝐴 ↔ (𝑋‘𝐵) ≤ 𝐴))
8	7	elrab 3626	. . . 4 ⊢ ((𝑋‘𝐵) ∈ {𝑥 ∈ ℝ ∣ 𝑥 ≤ 𝐴} ↔ ((𝑋‘𝐵) ∈ ℝ ∧ (𝑋‘𝐵) ≤ 𝐴))
9	5, 6, 8	sylanbrc 583	. . 3 ⊢ (𝜑 → (𝑋‘𝐵) ∈ {𝑥 ∈ ℝ ∣ 𝑥 ≤ 𝐴})
10	3	ffund 6602	. . . 4 ⊢ (𝜑 → Fun 𝑋)
11	1, 2	rrvdm 32422	. . . . 5 ⊢ (𝜑 → dom 𝑋 = ∪ dom 𝑃)
12	4, 11	eleqtrrd 2844	. . . 4 ⊢ (𝜑 → 𝐵 ∈ dom 𝑋)
13		fvimacnv 6927	. . . 4 ⊢ ((Fun 𝑋 ∧ 𝐵 ∈ dom 𝑋) → ((𝑋‘𝐵) ∈ {𝑥 ∈ ℝ ∣ 𝑥 ≤ 𝐴} ↔ 𝐵 ∈ (^◡𝑋 “ {𝑥 ∈ ℝ ∣ 𝑥 ≤ 𝐴})))
14	10, 12, 13	syl2anc 584	. . 3 ⊢ (𝜑 → ((𝑋‘𝐵) ∈ {𝑥 ∈ ℝ ∣ 𝑥 ≤ 𝐴} ↔ 𝐵 ∈ (^◡𝑋 “ {𝑥 ∈ ℝ ∣ 𝑥 ≤ 𝐴})))
15	9, 14	mpbid 231	. 2 ⊢ (𝜑 → 𝐵 ∈ (^◡𝑋 “ {𝑥 ∈ ℝ ∣ 𝑥 ≤ 𝐴}))
16		orvclteel.1	. . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ)
17	1, 2, 16	orrvcval4 32440	. 2 ⊢ (𝜑 → (𝑋∘_RV/𝑐 ≤ 𝐴) = (^◡𝑋 “ {𝑥 ∈ ℝ ∣ 𝑥 ≤ 𝐴}))
18	15, 17	eleqtrrd 2844	1 ⊢ (𝜑 → 𝐵 ∈ (𝑋∘_RV/𝑐 ≤ 𝐴))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∈ wcel 2110 {crab 3070 ∪ cuni 4845 class class class wbr 5079 ^◡ccnv 5589 dom cdm 5590 “ cima 5593 Fun wfun 6426 ‘cfv 6432 (class class class)co 7272 ℝcr 10881 ≤ cle 11021 Probcprb 32383 rRndVarcrrv 32416 ∘_RV/𝑐corvc 32431

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2015 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2711 ax-sep 5227 ax-nul 5234 ax-pow 5292 ax-pr 5356 ax-un 7583 ax-cnex 10938 ax-resscn 10939 ax-pre-lttri 10956 ax-pre-lttrn 10957

This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2072 df-mo 2542 df-eu 2571 df-clab 2718 df-cleq 2732 df-clel 2818 df-nfc 2891 df-ne 2946 df-nel 3052 df-ral 3071 df-rex 3072 df-rab 3075 df-v 3433 df-sbc 3721 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4846 df-int 4886 df-iun 4932 df-br 5080 df-opab 5142 df-mpt 5163 df-id 5490 df-po 5504 df-so 5505 df-xp 5596 df-rel 5597 df-cnv 5598 df-co 5599 df-dm 5600 df-rn 5601 df-res 5602 df-ima 5603 df-iota 6390 df-fun 6434 df-fn 6435 df-f 6436 df-f1 6437 df-fo 6438 df-f1o 6439 df-fv 6440 df-ov 7275 df-oprab 7276 df-mpo 7277 df-1st 7825 df-2nd 7826 df-er 8490 df-map 8609 df-en 8726 df-dom 8727 df-sdom 8728 df-pnf 11022 df-mnf 11023 df-xr 11024 df-ltxr 11025 df-le 11026 df-ioo 13094 df-topgen 17165 df-top 22054 df-bases 22107 df-esum 32005 df-siga 32086 df-sigagen 32116 df-brsiga 32159 df-meas 32173 df-mbfm 32227 df-prob 32384 df-rrv 32417 df-orvc 32432

This theorem is referenced by: dstfrvunirn 32450

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