rrvadd - Mathbox for Thierry Arnoux

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Theorem rrvadd 34489

Description: The sum of two random variables is a random variable. (Contributed by Thierry Arnoux, 4-Jun-2017.)

**Hypotheses**
Ref	Expression
rrvadd.1	⊢ (𝜑 → 𝑃 ∈ Prob)
rrvadd.2	⊢ (𝜑 → 𝑋 ∈ (rRndVar‘𝑃))
rrvadd.3	⊢ (𝜑 → 𝑌 ∈ (rRndVar‘𝑃))

**Assertion**
Ref	Expression
rrvadd	⊢ (𝜑 → (𝑋 ∘_f + 𝑌) ∈ (rRndVar‘𝑃))

Proof of Theorem rrvadd Dummy variables 𝑎 𝑏 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		nfmpt1 5225	. . . 4 ⊢ Ⅎ𝑎(𝑎 ∈ ∪ dom 𝑃 ↦ ⟨(𝑋‘𝑎), (𝑌‘𝑎)⟩)
2		rrvadd.1	. . . . 5 ⊢ (𝜑 → 𝑃 ∈ Prob)
3		rrvadd.2	. . . . 5 ⊢ (𝜑 → 𝑋 ∈ (rRndVar‘𝑃))
4	2, 3	rrvvf 34481	. . . 4 ⊢ (𝜑 → 𝑋:∪ dom 𝑃⟶ℝ)
5		rrvadd.3	. . . . 5 ⊢ (𝜑 → 𝑌 ∈ (rRndVar‘𝑃))
6	2, 5	rrvvf 34481	. . . 4 ⊢ (𝜑 → 𝑌:∪ dom 𝑃⟶ℝ)
7	2	unveldomd 34452	. . . 4 ⊢ (𝜑 → ∪ dom 𝑃 ∈ dom 𝑃)
8		eqidd 2737	. . . 4 ⊢ (𝜑 → (𝑎 ∈ ∪ dom 𝑃 ↦ ⟨(𝑋‘𝑎), (𝑌‘𝑎)⟩) = (𝑎 ∈ ∪ dom 𝑃 ↦ ⟨(𝑋‘𝑎), (𝑌‘𝑎)⟩))
9		eqidd 2737	. . . 4 ⊢ (𝜑 → (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ (𝑥 + 𝑦)) = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ (𝑥 + 𝑦)))
10	1, 4, 6, 7, 8, 9	ofoprabco 32647	. . 3 ⊢ (𝜑 → (𝑋 ∘_f + 𝑌) = ((𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ (𝑥 + 𝑦)) ∘ (𝑎 ∈ ∪ dom 𝑃 ↦ ⟨(𝑋‘𝑎), (𝑌‘𝑎)⟩)))
11		domprobsiga 34448	. . . . 5 ⊢ (𝑃 ∈ Prob → dom 𝑃 ∈ ∪ ran sigAlgebra)
12	2, 11	syl 17	. . . 4 ⊢ (𝜑 → dom 𝑃 ∈ ∪ ran sigAlgebra)
13		brsigarn 34220	. . . . . 6 ⊢ 𝔅_ℝ ∈ (sigAlgebra‘ℝ)
14		elrnsiga 34162	. . . . . 6 ⊢ (𝔅_ℝ ∈ (sigAlgebra‘ℝ) → 𝔅_ℝ ∈ ∪ ran sigAlgebra)
15	13, 14	mp1i 13	. . . . 5 ⊢ (𝜑 → 𝔅_ℝ ∈ ∪ ran sigAlgebra)
16		sxsiga 34227	. . . . 5 ⊢ ((𝔅_ℝ ∈ ∪ ran sigAlgebra ∧ 𝔅_ℝ ∈ ∪ ran sigAlgebra) → (𝔅_ℝ ×_s 𝔅_ℝ) ∈ ∪ ran sigAlgebra)
17	15, 15, 16	syl2anc 584	. . . 4 ⊢ (𝜑 → (𝔅_ℝ ×_s 𝔅_ℝ) ∈ ∪ ran sigAlgebra)
18	2	rrvmbfm 34479	. . . . . 6 ⊢ (𝜑 → (𝑋 ∈ (rRndVar‘𝑃) ↔ 𝑋 ∈ (dom 𝑃MblFnM𝔅_ℝ)))
19	3, 18	mpbid 232	. . . . 5 ⊢ (𝜑 → 𝑋 ∈ (dom 𝑃MblFnM𝔅_ℝ))
20	2	rrvmbfm 34479	. . . . . 6 ⊢ (𝜑 → (𝑌 ∈ (rRndVar‘𝑃) ↔ 𝑌 ∈ (dom 𝑃MblFnM𝔅_ℝ)))
21	5, 20	mpbid 232	. . . . 5 ⊢ (𝜑 → 𝑌 ∈ (dom 𝑃MblFnM𝔅_ℝ))
22		fveq2 6881	. . . . . . 7 ⊢ (𝑎 = 𝑏 → (𝑋‘𝑎) = (𝑋‘𝑏))
23		fveq2 6881	. . . . . . 7 ⊢ (𝑎 = 𝑏 → (𝑌‘𝑎) = (𝑌‘𝑏))
24	22, 23	opeq12d 4862	. . . . . 6 ⊢ (𝑎 = 𝑏 → ⟨(𝑋‘𝑎), (𝑌‘𝑎)⟩ = ⟨(𝑋‘𝑏), (𝑌‘𝑏)⟩)
25	24	cbvmptv 5230	. . . . 5 ⊢ (𝑎 ∈ ∪ dom 𝑃 ↦ ⟨(𝑋‘𝑎), (𝑌‘𝑎)⟩) = (𝑏 ∈ ∪ dom 𝑃 ↦ ⟨(𝑋‘𝑏), (𝑌‘𝑏)⟩)
26	12, 15, 15, 19, 21, 25	mbfmco2 34302	. . . 4 ⊢ (𝜑 → (𝑎 ∈ ∪ dom 𝑃 ↦ ⟨(𝑋‘𝑎), (𝑌‘𝑎)⟩) ∈ (dom 𝑃MblFnM(𝔅_ℝ ×_s 𝔅_ℝ)))
27		eqid 2736	. . . . . . 7 ⊢ (topGen‘ran (,)) = (topGen‘ran (,))
28	27	raddcn 33965	. . . . . 6 ⊢ (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ (𝑥 + 𝑦)) ∈ (((topGen‘ran (,)) ×_t (topGen‘ran (,))) Cn (topGen‘ran (,)))
29	28	a1i 11	. . . . 5 ⊢ (𝜑 → (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ (𝑥 + 𝑦)) ∈ (((topGen‘ran (,)) ×_t (topGen‘ran (,))) Cn (topGen‘ran (,))))
30	27	sxbrsiga 34327	. . . . . 6 ⊢ (𝔅_ℝ ×_s 𝔅_ℝ) = (sigaGen‘((topGen‘ran (,)) ×_t (topGen‘ran (,))))
31	30	a1i 11	. . . . 5 ⊢ (𝜑 → (𝔅_ℝ ×_s 𝔅_ℝ) = (sigaGen‘((topGen‘ran (,)) ×_t (topGen‘ran (,)))))
32		df-brsiga 34218	. . . . . 6 ⊢ 𝔅_ℝ = (sigaGen‘(topGen‘ran (,)))
33	32	a1i 11	. . . . 5 ⊢ (𝜑 → 𝔅_ℝ = (sigaGen‘(topGen‘ran (,))))
34	29, 31, 33	cnmbfm 34300	. . . 4 ⊢ (𝜑 → (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ (𝑥 + 𝑦)) ∈ ((𝔅_ℝ ×_s 𝔅_ℝ)MblFnM𝔅_ℝ))
35	12, 17, 15, 26, 34	mbfmco 34301	. . 3 ⊢ (𝜑 → ((𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ (𝑥 + 𝑦)) ∘ (𝑎 ∈ ∪ dom 𝑃 ↦ ⟨(𝑋‘𝑎), (𝑌‘𝑎)⟩)) ∈ (dom 𝑃MblFnM𝔅_ℝ))
36	10, 35	eqeltrd 2835	. 2 ⊢ (𝜑 → (𝑋 ∘_f + 𝑌) ∈ (dom 𝑃MblFnM𝔅_ℝ))
37	2	rrvmbfm 34479	. 2 ⊢ (𝜑 → ((𝑋 ∘_f + 𝑌) ∈ (rRndVar‘𝑃) ↔ (𝑋 ∘_f + 𝑌) ∈ (dom 𝑃MblFnM𝔅_ℝ)))
38	36, 37	mpbird 257	1 ⊢ (𝜑 → (𝑋 ∘_f + 𝑌) ∈ (rRndVar‘𝑃))

Colors of variables: wff setvar class

Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2109 ⟨cop 4612 ∪ cuni 4888 ↦ cmpt 5206 dom cdm 5659 ran crn 5660 ∘ ccom 5663 ‘cfv 6536 (class class class)co 7410 ∈ cmpo 7412 ∘_f cof 7674 ℝcr 11133 + caddc 11137 (,)cioo 13367 topGenctg 17456 Cn ccn 23167 ×_t ctx 23503 sigAlgebracsiga 34144 sigaGencsigagen 34174 𝔅_ℝcbrsiga 34217 ×_s csx 34224 MblFnMcmbfm 34285 Probcprb 34444 rRndVarcrrv 34477

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2708 ax-rep 5254 ax-sep 5271 ax-nul 5281 ax-pow 5340 ax-pr 5407 ax-un 7734 ax-inf2 9660 ax-ac2 10482 ax-cnex 11190 ax-resscn 11191 ax-1cn 11192 ax-icn 11193 ax-addcl 11194 ax-addrcl 11195 ax-mulcl 11196 ax-mulrcl 11197 ax-mulcom 11198 ax-addass 11199 ax-mulass 11200 ax-distr 11201 ax-i2m1 11202 ax-1ne0 11203 ax-1rid 11204 ax-rnegex 11205 ax-rrecex 11206 ax-cnre 11207 ax-pre-lttri 11208 ax-pre-lttrn 11209 ax-pre-ltadd 11210 ax-pre-mulgt0 11211 ax-pre-sup 11212 ax-addf 11213

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2810 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3062 df-rmo 3364 df-reu 3365 df-rab 3421 df-v 3466 df-sbc 3771 df-csb 3880 df-dif 3934 df-un 3936 df-in 3938 df-ss 3948 df-pss 3951 df-nul 4314 df-if 4506 df-pw 4582 df-sn 4607 df-pr 4609 df-tp 4611 df-op 4613 df-uni 4889 df-int 4928 df-iun 4974 df-iin 4975 df-br 5125 df-opab 5187 df-mpt 5207 df-tr 5235 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-se 5612 df-we 5613 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6295 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-isom 6545 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-of 7676 df-om 7867 df-1st 7993 df-2nd 7994 df-supp 8165 df-frecs 8285 df-wrecs 8316 df-recs 8390 df-rdg 8429 df-1o 8485 df-2o 8486 df-oadd 8489 df-omul 8490 df-er 8724 df-map 8847 df-pm 8848 df-ixp 8917 df-en 8965 df-dom 8966 df-sdom 8967 df-fin 8968 df-fsupp 9379 df-fi 9428 df-sup 9459 df-inf 9460 df-oi 9529 df-dju 9920 df-card 9958 df-acn 9961 df-ac 10135 df-pnf 11276 df-mnf 11277 df-xr 11278 df-ltxr 11279 df-le 11280 df-sub 11473 df-neg 11474 df-div 11900 df-nn 12246 df-2 12308 df-3 12309 df-4 12310 df-5 12311 df-6 12312 df-7 12313 df-8 12314 df-9 12315 df-n0 12507 df-z 12594 df-dec 12714 df-uz 12858 df-q 12970 df-rp 13014 df-xneg 13133 df-xadd 13134 df-xmul 13135 df-ioo 13371 df-ioc 13372 df-ico 13373 df-icc 13374 df-fz 13530 df-fzo 13677 df-fl 13814 df-mod 13892 df-seq 14025 df-exp 14085 df-fac 14297 df-bc 14326 df-hash 14354 df-shft 15091 df-cj 15123 df-re 15124 df-im 15125 df-sqrt 15259 df-abs 15260 df-limsup 15492 df-clim 15509 df-rlim 15510 df-sum 15708 df-ef 16088 df-sin 16090 df-cos 16091 df-pi 16093 df-struct 17171 df-sets 17188 df-slot 17206 df-ndx 17218 df-base 17234 df-ress 17257 df-plusg 17289 df-mulr 17290 df-starv 17291 df-sca 17292 df-vsca 17293 df-ip 17294 df-tset 17295 df-ple 17296 df-ds 17298 df-unif 17299 df-hom 17300 df-cco 17301 df-rest 17441 df-topn 17442 df-0g 17460 df-gsum 17461 df-topgen 17462 df-pt 17463 df-prds 17466 df-xrs 17521 df-qtop 17526 df-imas 17527 df-xps 17529 df-mre 17603 df-mrc 17604 df-acs 17606 df-mgm 18623 df-sgrp 18702 df-mnd 18718 df-submnd 18767 df-mulg 19056 df-cntz 19305 df-cmn 19768 df-psmet 21312 df-xmet 21313 df-met 21314 df-bl 21315 df-mopn 21316 df-fbas 21317 df-fg 21318 df-cnfld 21321 df-refld 21570 df-top 22837 df-topon 22854 df-topsp 22876 df-bases 22889 df-cld 22962 df-ntr 22963 df-cls 22964 df-nei 23041 df-lp 23079 df-perf 23080 df-cn 23170 df-cnp 23171 df-haus 23258 df-cmp 23330 df-tx 23505 df-hmeo 23698 df-fil 23789 df-fm 23881 df-flim 23882 df-flf 23883 df-fcls 23884 df-xms 24264 df-ms 24265 df-tms 24266 df-cncf 24827 df-cfil 25212 df-cmet 25214 df-cms 25292 df-limc 25824 df-dv 25825 df-log 26522 df-cxp 26523 df-logb 26732 df-esum 34064 df-siga 34145 df-sigagen 34175 df-brsiga 34218 df-sx 34225 df-meas 34232 df-mbfm 34286 df-prob 34445 df-rrv 34478

This theorem is referenced by: rrvsum 34491

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