ioorrnopnxr - Mathbox for Glauco Siliprandi

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Theorem ioorrnopnxr 46228

Description: The indexed product of open intervals is an open set in (ℝ^‘𝑋). Similar to ioorrnopn 46226 but here unbounded intervals are allowed. (Contributed by Glauco Siliprandi, 8-Apr-2021.)

**Hypotheses**
Ref	Expression
ioorrnopnxr.x	⊢ (𝜑 → 𝑋 ∈ Fin)
ioorrnopnxr.a	⊢ (𝜑 → 𝐴:𝑋⟶ℝ^*)
ioorrnopnxr.b	⊢ (𝜑 → 𝐵:𝑋⟶ℝ^*)

**Assertion**
Ref	Expression
ioorrnopnxr	⊢ (𝜑 → X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ∈ (TopOpen‘(ℝ^‘𝑋)))

Distinct variable groups: 𝐴,𝑖 𝐵,𝑖 𝑖,𝑋 𝜑,𝑖

Proof of Theorem ioorrnopnxr Dummy variables 𝑓 𝑗 𝑣 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		p0ex 5402	. . . . . 6 ⊢ {∅} ∈ V
2	1	prid2 4788	. . . . 5 ⊢ {∅} ∈ {∅, {∅}}
3	2	a1i 11	. . . 4 ⊢ (𝑋 = ∅ → {∅} ∈ {∅, {∅}})
4		ixpeq1 8966	. . . . . 6 ⊢ (𝑋 = ∅ → X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) = X𝑖 ∈ ∅ ((𝐴‘𝑖)(,)(𝐵‘𝑖)))
5		ixp0x 8984	. . . . . . 7 ⊢ X𝑖 ∈ ∅ ((𝐴‘𝑖)(,)(𝐵‘𝑖)) = {∅}
6	5	a1i 11	. . . . . 6 ⊢ (𝑋 = ∅ → X𝑖 ∈ ∅ ((𝐴‘𝑖)(,)(𝐵‘𝑖)) = {∅})
7	4, 6	eqtrd 2780	. . . . 5 ⊢ (𝑋 = ∅ → X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) = {∅})
8		2fveq3 6925	. . . . . 6 ⊢ (𝑋 = ∅ → (TopOpen‘(ℝ^‘𝑋)) = (TopOpen‘(ℝ^‘∅)))
9		rrxtopn0b 46217	. . . . . . 7 ⊢ (TopOpen‘(ℝ^‘∅)) = {∅, {∅}}
10	9	a1i 11	. . . . . 6 ⊢ (𝑋 = ∅ → (TopOpen‘(ℝ^‘∅)) = {∅, {∅}})
11	8, 10	eqtrd 2780	. . . . 5 ⊢ (𝑋 = ∅ → (TopOpen‘(ℝ^‘𝑋)) = {∅, {∅}})
12	7, 11	eleq12d 2838	. . . 4 ⊢ (𝑋 = ∅ → (X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ∈ (TopOpen‘(ℝ^‘𝑋)) ↔ {∅} ∈ {∅, {∅}}))
13	3, 12	mpbird 257	. . 3 ⊢ (𝑋 = ∅ → X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ∈ (TopOpen‘(ℝ^‘𝑋)))
14	13	adantl 481	. 2 ⊢ ((𝜑 ∧ 𝑋 = ∅) → X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ∈ (TopOpen‘(ℝ^‘𝑋)))
15		neqne 2954	. . . 4 ⊢ (¬ 𝑋 = ∅ → 𝑋 ≠ ∅)
16	15	adantl 481	. . 3 ⊢ ((𝜑 ∧ ¬ 𝑋 = ∅) → 𝑋 ≠ ∅)
17		fveq2 6920	. . . . . . . . . . 11 ⊢ (𝑖 = 𝑗 → (𝐴‘𝑖) = (𝐴‘𝑗))
18		fveq2 6920	. . . . . . . . . . 11 ⊢ (𝑖 = 𝑗 → (𝐵‘𝑖) = (𝐵‘𝑗))
19	17, 18	oveq12d 7466	. . . . . . . . . 10 ⊢ (𝑖 = 𝑗 → ((𝐴‘𝑖)(,)(𝐵‘𝑖)) = ((𝐴‘𝑗)(,)(𝐵‘𝑗)))
20	19	cbvixpv 8973	. . . . . . . . 9 ⊢ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) = X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗))
21	20	eleq2i 2836	. . . . . . . 8 ⊢ (𝑓 ∈ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ↔ 𝑓 ∈ X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗)))
22	21	biimpi 216	. . . . . . 7 ⊢ (𝑓 ∈ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) → 𝑓 ∈ X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗)))
23	22	adantl 481	. . . . . 6 ⊢ (((𝜑 ∧ 𝑋 ≠ ∅) ∧ 𝑓 ∈ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖))) → 𝑓 ∈ X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗)))
24		ioorrnopnxr.x	. . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ Fin)
25	24	ad2antrr 725	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑋 ≠ ∅) ∧ 𝑓 ∈ X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗))) → 𝑋 ∈ Fin)
26		ioorrnopnxr.a	. . . . . . . 8 ⊢ (𝜑 → 𝐴:𝑋⟶ℝ^*)
27	26	ad2antrr 725	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑋 ≠ ∅) ∧ 𝑓 ∈ X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗))) → 𝐴:𝑋⟶ℝ^*)
28		ioorrnopnxr.b	. . . . . . . 8 ⊢ (𝜑 → 𝐵:𝑋⟶ℝ^*)
29	28	ad2antrr 725	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑋 ≠ ∅) ∧ 𝑓 ∈ X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗))) → 𝐵:𝑋⟶ℝ^*)
30	21	biimpri 228	. . . . . . . 8 ⊢ (𝑓 ∈ X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗)) → 𝑓 ∈ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)))
31	30	adantl 481	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑋 ≠ ∅) ∧ 𝑓 ∈ X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗))) → 𝑓 ∈ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)))
32		fveq2 6920	. . . . . . . . . 10 ⊢ (𝑗 = 𝑖 → (𝐴‘𝑗) = (𝐴‘𝑖))
33	32	eqeq1d 2742	. . . . . . . . 9 ⊢ (𝑗 = 𝑖 → ((𝐴‘𝑗) = -∞ ↔ (𝐴‘𝑖) = -∞))
34		fveq2 6920	. . . . . . . . . 10 ⊢ (𝑗 = 𝑖 → (𝑓‘𝑗) = (𝑓‘𝑖))
35	34	oveq1d 7463	. . . . . . . . 9 ⊢ (𝑗 = 𝑖 → ((𝑓‘𝑗) − 1) = ((𝑓‘𝑖) − 1))
36	33, 35, 32	ifbieq12d 4576	. . . . . . . 8 ⊢ (𝑗 = 𝑖 → if((𝐴‘𝑗) = -∞, ((𝑓‘𝑗) − 1), (𝐴‘𝑗)) = if((𝐴‘𝑖) = -∞, ((𝑓‘𝑖) − 1), (𝐴‘𝑖)))
37	36	cbvmptv 5279	. . . . . . 7 ⊢ (𝑗 ∈ 𝑋 ↦ if((𝐴‘𝑗) = -∞, ((𝑓‘𝑗) − 1), (𝐴‘𝑗))) = (𝑖 ∈ 𝑋 ↦ if((𝐴‘𝑖) = -∞, ((𝑓‘𝑖) − 1), (𝐴‘𝑖)))
38		fveq2 6920	. . . . . . . . . 10 ⊢ (𝑗 = 𝑖 → (𝐵‘𝑗) = (𝐵‘𝑖))
39	38	eqeq1d 2742	. . . . . . . . 9 ⊢ (𝑗 = 𝑖 → ((𝐵‘𝑗) = +∞ ↔ (𝐵‘𝑖) = +∞))
40	34	oveq1d 7463	. . . . . . . . 9 ⊢ (𝑗 = 𝑖 → ((𝑓‘𝑗) + 1) = ((𝑓‘𝑖) + 1))
41	39, 40, 38	ifbieq12d 4576	. . . . . . . 8 ⊢ (𝑗 = 𝑖 → if((𝐵‘𝑗) = +∞, ((𝑓‘𝑗) + 1), (𝐵‘𝑗)) = if((𝐵‘𝑖) = +∞, ((𝑓‘𝑖) + 1), (𝐵‘𝑖)))
42	41	cbvmptv 5279	. . . . . . 7 ⊢ (𝑗 ∈ 𝑋 ↦ if((𝐵‘𝑗) = +∞, ((𝑓‘𝑗) + 1), (𝐵‘𝑗))) = (𝑖 ∈ 𝑋 ↦ if((𝐵‘𝑖) = +∞, ((𝑓‘𝑖) + 1), (𝐵‘𝑖)))
43		eqid 2740	. . . . . . 7 ⊢ X𝑖 ∈ 𝑋 (((𝑗 ∈ 𝑋 ↦ if((𝐴‘𝑗) = -∞, ((𝑓‘𝑗) − 1), (𝐴‘𝑗)))‘𝑖)(,)((𝑗 ∈ 𝑋 ↦ if((𝐵‘𝑗) = +∞, ((𝑓‘𝑗) + 1), (𝐵‘𝑗)))‘𝑖)) = X𝑖 ∈ 𝑋 (((𝑗 ∈ 𝑋 ↦ if((𝐴‘𝑗) = -∞, ((𝑓‘𝑗) − 1), (𝐴‘𝑗)))‘𝑖)(,)((𝑗 ∈ 𝑋 ↦ if((𝐵‘𝑗) = +∞, ((𝑓‘𝑗) + 1), (𝐵‘𝑗)))‘𝑖))
44	25, 27, 29, 31, 37, 42, 43	ioorrnopnxrlem 46227	. . . . . 6 ⊢ (((𝜑 ∧ 𝑋 ≠ ∅) ∧ 𝑓 ∈ X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗))) → ∃𝑣 ∈ (TopOpen‘(ℝ^‘𝑋))(𝑓 ∈ 𝑣 ∧ 𝑣 ⊆ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖))))
45	23, 44	syldan 590	. . . . 5 ⊢ (((𝜑 ∧ 𝑋 ≠ ∅) ∧ 𝑓 ∈ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖))) → ∃𝑣 ∈ (TopOpen‘(ℝ^‘𝑋))(𝑓 ∈ 𝑣 ∧ 𝑣 ⊆ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖))))
46	45	ralrimiva 3152	. . . 4 ⊢ ((𝜑 ∧ 𝑋 ≠ ∅) → ∀𝑓 ∈ X 𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖))∃𝑣 ∈ (TopOpen‘(ℝ^‘𝑋))(𝑓 ∈ 𝑣 ∧ 𝑣 ⊆ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖))))
47		eqid 2740	. . . . . . . 8 ⊢ (TopOpen‘(ℝ^‘𝑋)) = (TopOpen‘(ℝ^‘𝑋))
48	47	rrxtop 46210	. . . . . . 7 ⊢ (𝑋 ∈ Fin → (TopOpen‘(ℝ^‘𝑋)) ∈ Top)
49	24, 48	syl 17	. . . . . 6 ⊢ (𝜑 → (TopOpen‘(ℝ^‘𝑋)) ∈ Top)
50	49	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ≠ ∅) → (TopOpen‘(ℝ^‘𝑋)) ∈ Top)
51		eltop2 23003	. . . . 5 ⊢ ((TopOpen‘(ℝ^‘𝑋)) ∈ Top → (X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ∈ (TopOpen‘(ℝ^‘𝑋)) ↔ ∀𝑓 ∈ X 𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖))∃𝑣 ∈ (TopOpen‘(ℝ^‘𝑋))(𝑓 ∈ 𝑣 ∧ 𝑣 ⊆ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)))))
52	50, 51	syl 17	. . . 4 ⊢ ((𝜑 ∧ 𝑋 ≠ ∅) → (X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ∈ (TopOpen‘(ℝ^‘𝑋)) ↔ ∀𝑓 ∈ X 𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖))∃𝑣 ∈ (TopOpen‘(ℝ^‘𝑋))(𝑓 ∈ 𝑣 ∧ 𝑣 ⊆ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)))))
53	46, 52	mpbird 257	. . 3 ⊢ ((𝜑 ∧ 𝑋 ≠ ∅) → X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ∈ (TopOpen‘(ℝ^‘𝑋)))
54	16, 53	syldan 590	. 2 ⊢ ((𝜑 ∧ ¬ 𝑋 = ∅) → X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ∈ (TopOpen‘(ℝ^‘𝑋)))
55	14, 54	pm2.61dan 812	1 ⊢ (𝜑 → X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ∈ (TopOpen‘(ℝ^‘𝑋)))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1537 ∈ wcel 2108 ≠ wne 2946 ∀wral 3067 ∃wrex 3076 ⊆ wss 3976 ∅c0 4352 ifcif 4548 {csn 4648 {cpr 4650 ↦ cmpt 5249 ⟶wf 6569 ‘cfv 6573 (class class class)co 7448 Xcixp 8955 Fincfn 9003 1c1 11185 + caddc 11187 +∞cpnf 11321 -∞cmnf 11322 ℝ^*cxr 11323 − cmin 11520 (,)cioo 13407 TopOpenctopn 17481 Topctop 22920 ℝ^crrx 25436

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2158 ax-12 2178 ax-ext 2711 ax-rep 5303 ax-sep 5317 ax-nul 5324 ax-pow 5383 ax-pr 5447 ax-un 7770 ax-inf2 9710 ax-cnex 11240 ax-resscn 11241 ax-1cn 11242 ax-icn 11243 ax-addcl 11244 ax-addrcl 11245 ax-mulcl 11246 ax-mulrcl 11247 ax-mulcom 11248 ax-addass 11249 ax-mulass 11250 ax-distr 11251 ax-i2m1 11252 ax-1ne0 11253 ax-1rid 11254 ax-rnegex 11255 ax-rrecex 11256 ax-cnre 11257 ax-pre-lttri 11258 ax-pre-lttrn 11259 ax-pre-ltadd 11260 ax-pre-mulgt0 11261 ax-pre-sup 11262 ax-addf 11263 ax-mulf 11264

This theorem depends on definitions: df-bi 207 df-an 396 df-or 847 df-3or 1088 df-3an 1089 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2065 df-mo 2543 df-eu 2572 df-clab 2718 df-cleq 2732 df-clel 2819 df-nfc 2895 df-ne 2947 df-nel 3053 df-ral 3068 df-rex 3077 df-rmo 3388 df-reu 3389 df-rab 3444 df-v 3490 df-sbc 3805 df-csb 3922 df-dif 3979 df-un 3981 df-in 3983 df-ss 3993 df-pss 3996 df-nul 4353 df-if 4549 df-pw 4624 df-sn 4649 df-pr 4651 df-tp 4653 df-op 4655 df-uni 4932 df-int 4971 df-iun 5017 df-br 5167 df-opab 5229 df-mpt 5250 df-tr 5284 df-id 5593 df-eprel 5599 df-po 5607 df-so 5608 df-fr 5652 df-se 5653 df-we 5654 df-xp 5706 df-rel 5707 df-cnv 5708 df-co 5709 df-dm 5710 df-rn 5711 df-res 5712 df-ima 5713 df-pred 6332 df-ord 6398 df-on 6399 df-lim 6400 df-suc 6401 df-iota 6525 df-fun 6575 df-fn 6576 df-f 6577 df-f1 6578 df-fo 6579 df-f1o 6580 df-fv 6581 df-isom 6582 df-riota 7404 df-ov 7451 df-oprab 7452 df-mpo 7453 df-of 7714 df-om 7904 df-1st 8030 df-2nd 8031 df-supp 8202 df-tpos 8267 df-frecs 8322 df-wrecs 8353 df-recs 8427 df-rdg 8466 df-1o 8522 df-er 8763 df-map 8886 df-ixp 8956 df-en 9004 df-dom 9005 df-sdom 9006 df-fin 9007 df-fsupp 9432 df-sup 9511 df-inf 9512 df-oi 9579 df-card 10008 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11522 df-neg 11523 df-div 11948 df-nn 12294 df-2 12356 df-3 12357 df-4 12358 df-5 12359 df-6 12360 df-7 12361 df-8 12362 df-9 12363 df-n0 12554 df-z 12640 df-dec 12759 df-uz 12904 df-q 13014 df-rp 13058 df-xneg 13175 df-xadd 13176 df-xmul 13177 df-ioo 13411 df-ico 13413 df-fz 13568 df-fzo 13712 df-seq 14053 df-exp 14113 df-hash 14380 df-cj 15148 df-re 15149 df-im 15150 df-sqrt 15284 df-abs 15285 df-clim 15534 df-sum 15735 df-struct 17194 df-sets 17211 df-slot 17229 df-ndx 17241 df-base 17259 df-ress 17288 df-plusg 17324 df-mulr 17325 df-starv 17326 df-sca 17327 df-vsca 17328 df-ip 17329 df-tset 17330 df-ple 17331 df-ds 17333 df-unif 17334 df-hom 17335 df-cco 17336 df-rest 17482 df-topn 17483 df-0g 17501 df-gsum 17502 df-topgen 17503 df-prds 17507 df-pws 17509 df-mgm 18678 df-sgrp 18757 df-mnd 18773 df-mhm 18818 df-submnd 18819 df-grp 18976 df-minusg 18977 df-sbg 18978 df-subg 19163 df-ghm 19253 df-cntz 19357 df-cmn 19824 df-abl 19825 df-mgp 20162 df-rng 20180 df-ur 20209 df-ring 20262 df-cring 20263 df-oppr 20360 df-dvdsr 20383 df-unit 20384 df-invr 20414 df-dvr 20427 df-rhm 20498 df-subrng 20572 df-subrg 20597 df-drng 20753 df-field 20754 df-abv 20832 df-staf 20862 df-srng 20863 df-lmod 20882 df-lss 20953 df-lmhm 21044 df-lvec 21125 df-sra 21195 df-rgmod 21196 df-psmet 21379 df-xmet 21380 df-met 21381 df-bl 21382 df-mopn 21383 df-cnfld 21388 df-refld 21646 df-phl 21667 df-dsmm 21775 df-frlm 21790 df-top 22921 df-topon 22938 df-topsp 22960 df-bases 22974 df-xms 24351 df-ms 24352 df-nm 24616 df-ngp 24617 df-tng 24618 df-nrg 24619 df-nlm 24620 df-clm 25115 df-cph 25221 df-tcph 25222 df-rrx 25438

This theorem is referenced by: ioovonmbl 46598

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