ioorrnopnxr - Mathbox for Glauco Siliprandi

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Theorem ioorrnopnxr 47532

Description: The indexed product of open intervals is an open set in (ℝ^‘𝑋). Similar to ioorrnopn 47530 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 5351	. . . . . 6 ⊢ {∅} ∈ V
2	1	prid2 4724	. . . . 5 ⊢ {∅} ∈ {∅, {∅}}
3	2	a1i 11	. . . 4 ⊢ (𝑋 = ∅ → {∅} ∈ {∅, {∅}})
4		ixpeq1 8967	. . . . . 6 ⊢ (𝑋 = ∅ → X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) = X𝑖 ∈ ∅ ((𝐴‘𝑖)(,)(𝐵‘𝑖)))
5		ixp0x 8985	. . . . . . 7 ⊢ X𝑖 ∈ ∅ ((𝐴‘𝑖)(,)(𝐵‘𝑖)) = {∅}
6	5	a1i 11	. . . . . 6 ⊢ (𝑋 = ∅ → X𝑖 ∈ ∅ ((𝐴‘𝑖)(,)(𝐵‘𝑖)) = {∅})
7	4, 6	eqtrd 2798	. . . . 5 ⊢ (𝑋 = ∅ → X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) = {∅})
8		2fveq3 6916	. . . . . 6 ⊢ (𝑋 = ∅ → (TopOpen‘(ℝ^‘𝑋)) = (TopOpen‘(ℝ^‘∅)))
9		rrxtopn0b 47521	. . . . . . 7 ⊢ (TopOpen‘(ℝ^‘∅)) = {∅, {∅}}
10	9	a1i 11	. . . . . 6 ⊢ (𝑋 = ∅ → (TopOpen‘(ℝ^‘∅)) = {∅, {∅}})
11	8, 10	eqtrd 2798	. . . . 5 ⊢ (𝑋 = ∅ → (TopOpen‘(ℝ^‘𝑋)) = {∅, {∅}})
12	7, 11	eleq12d 2858	. . . 4 ⊢ (𝑋 = ∅ → (X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ∈ (TopOpen‘(ℝ^‘𝑋)) ↔ {∅} ∈ {∅, {∅}}))
13	3, 12	mpbird 260	. . 3 ⊢ (𝑋 = ∅ → X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ∈ (TopOpen‘(ℝ^‘𝑋)))
14	13	adantl 487	. 2 ⊢ ((𝜑 ∧ 𝑋 = ∅) → X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ∈ (TopOpen‘(ℝ^‘𝑋)))
15		neqne 2967	. . . 4 ⊢ (¬ 𝑋 = ∅ → 𝑋 ≠ ∅)
16	15	adantl 487	. . 3 ⊢ ((𝜑 ∧ ¬ 𝑋 = ∅) → 𝑋 ≠ ∅)
17		fveq2 6911	. . . . . . . . . 10 ⊢ (𝑖 = 𝑗 → (𝐴‘𝑖) = (𝐴‘𝑗))
18		fveq2 6911	. . . . . . . . . 10 ⊢ (𝑖 = 𝑗 → (𝐵‘𝑖) = (𝐵‘𝑗))
19	17, 18	oveq12d 7464	. . . . . . . . 9 ⊢ (𝑖 = 𝑗 → ((𝐴‘𝑖)(,)(𝐵‘𝑖)) = ((𝐴‘𝑗)(,)(𝐵‘𝑗)))
20	19	cbvixpv 8974	. . . . . . . 8 ⊢ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) = X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗))
21	20	eleq2i 2856	. . . . . . 7 ⊢ (𝑓 ∈ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ↔ 𝑓 ∈ X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗)))
22	21	bilani 510	. . . . . 6 ⊢ (((𝜑 ∧ 𝑋 ≠ ∅) ∧ 𝑓 ∈ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖))) → 𝑓 ∈ X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗)))
23		ioorrnopnxr.x	. . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ Fin)
24	23	ad2antrr 739	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑋 ≠ ∅) ∧ 𝑓 ∈ X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗))) → 𝑋 ∈ Fin)
25		ioorrnopnxr.a	. . . . . . . 8 ⊢ (𝜑 → 𝐴:𝑋⟶ℝ^*)
26	25	ad2antrr 739	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑋 ≠ ∅) ∧ 𝑓 ∈ X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗))) → 𝐴:𝑋⟶ℝ^*)
27		ioorrnopnxr.b	. . . . . . . 8 ⊢ (𝜑 → 𝐵:𝑋⟶ℝ^*)
28	27	ad2antrr 739	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑋 ≠ ∅) ∧ 𝑓 ∈ X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗))) → 𝐵:𝑋⟶ℝ^*)
29	21	bilanri 512	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑋 ≠ ∅) ∧ 𝑓 ∈ X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗))) → 𝑓 ∈ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)))
30		fveq2 6911	. . . . . . . . . 10 ⊢ (𝑗 = 𝑖 → (𝐴‘𝑗) = (𝐴‘𝑖))
31	30	eqeq1d 2765	. . . . . . . . 9 ⊢ (𝑗 = 𝑖 → ((𝐴‘𝑗) = -∞ ↔ (𝐴‘𝑖) = -∞))
32		fveq2 6911	. . . . . . . . . 10 ⊢ (𝑗 = 𝑖 → (𝑓‘𝑗) = (𝑓‘𝑖))
33	32	oveq1d 7461	. . . . . . . . 9 ⊢ (𝑗 = 𝑖 → ((𝑓‘𝑗) − 1) = ((𝑓‘𝑖) − 1))
34	31, 33, 30	ifbieq12d 4514	. . . . . . . 8 ⊢ (𝑗 = 𝑖 → if((𝐴‘𝑗) = -∞, ((𝑓‘𝑗) − 1), (𝐴‘𝑗)) = if((𝐴‘𝑖) = -∞, ((𝑓‘𝑖) − 1), (𝐴‘𝑖)))
35	34	cbvmptv 5213	. . . . . . 7 ⊢ (𝑗 ∈ 𝑋 ↦ if((𝐴‘𝑗) = -∞, ((𝑓‘𝑗) − 1), (𝐴‘𝑗))) = (𝑖 ∈ 𝑋 ↦ if((𝐴‘𝑖) = -∞, ((𝑓‘𝑖) − 1), (𝐴‘𝑖)))
36		fveq2 6911	. . . . . . . . . 10 ⊢ (𝑗 = 𝑖 → (𝐵‘𝑗) = (𝐵‘𝑖))
37	36	eqeq1d 2765	. . . . . . . . 9 ⊢ (𝑗 = 𝑖 → ((𝐵‘𝑗) = +∞ ↔ (𝐵‘𝑖) = +∞))
38	32	oveq1d 7461	. . . . . . . . 9 ⊢ (𝑗 = 𝑖 → ((𝑓‘𝑗) + 1) = ((𝑓‘𝑖) + 1))
39	37, 38, 36	ifbieq12d 4514	. . . . . . . 8 ⊢ (𝑗 = 𝑖 → if((𝐵‘𝑗) = +∞, ((𝑓‘𝑗) + 1), (𝐵‘𝑗)) = if((𝐵‘𝑖) = +∞, ((𝑓‘𝑖) + 1), (𝐵‘𝑖)))
40	39	cbvmptv 5213	. . . . . . 7 ⊢ (𝑗 ∈ 𝑋 ↦ if((𝐵‘𝑗) = +∞, ((𝑓‘𝑗) + 1), (𝐵‘𝑗))) = (𝑖 ∈ 𝑋 ↦ if((𝐵‘𝑖) = +∞, ((𝑓‘𝑖) + 1), (𝐵‘𝑖)))
41		eqid 2763	. . . . . . 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))
42	24, 26, 28, 29, 35, 40, 41	ioorrnopnxrlem 47531	. . . . . 6 ⊢ (((𝜑 ∧ 𝑋 ≠ ∅) ∧ 𝑓 ∈ X𝑗 ∈ 𝑋 ((𝐴‘𝑗)(,)(𝐵‘𝑗))) → ∃𝑣 ∈ (TopOpen‘(ℝ^‘𝑋))(𝑓 ∈ 𝑣 ∧ 𝑣 ⊆ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖))))
43	22, 42	syldan 603	. . . . 5 ⊢ (((𝜑 ∧ 𝑋 ≠ ∅) ∧ 𝑓 ∈ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖))) → ∃𝑣 ∈ (TopOpen‘(ℝ^‘𝑋))(𝑓 ∈ 𝑣 ∧ 𝑣 ⊆ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖))))
44	43	ralrimiva 3158	. . . 4 ⊢ ((𝜑 ∧ 𝑋 ≠ ∅) → ∀𝑓 ∈ X 𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖))∃𝑣 ∈ (TopOpen‘(ℝ^‘𝑋))(𝑓 ∈ 𝑣 ∧ 𝑣 ⊆ X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖))))
45		eqid 2763	. . . . . . . 8 ⊢ (TopOpen‘(ℝ^‘𝑋)) = (TopOpen‘(ℝ^‘𝑋))
46	45	rrxtop 47514	. . . . . . 7 ⊢ (𝑋 ∈ Fin → (TopOpen‘(ℝ^‘𝑋)) ∈ Top)
47	23, 46	syl 18	. . . . . 6 ⊢ (𝜑 → (TopOpen‘(ℝ^‘𝑋)) ∈ Top)
48	47	adantr 486	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ≠ ∅) → (TopOpen‘(ℝ^‘𝑋)) ∈ Top)
49		eltop2 23326	. . . . 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)))))
50	48, 49	syl 18	. . . 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)))))
51	44, 50	mpbird 260	. . 3 ⊢ ((𝜑 ∧ 𝑋 ≠ ∅) → X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ∈ (TopOpen‘(ℝ^‘𝑋)))
52	16, 51	syldan 603	. 2 ⊢ ((𝜑 ∧ ¬ 𝑋 = ∅) → X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ∈ (TopOpen‘(ℝ^‘𝑋)))
53	14, 52	pm2.61dan 825	1 ⊢ (𝜑 → X𝑖 ∈ 𝑋 ((𝐴‘𝑖)(,)(𝐵‘𝑖)) ∈ (TopOpen‘(ℝ^‘𝑋)))

Colors of variables: wff setvar class

This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2147 ≠ wne 2959 ∀wral 3080 ∃wrex 3090 ⊆ wss 3900 ∅c0 4281 ifcif 4485 {csn 4588 {cpr 4590 ↦ cmpt 5190 ⟶wf 6557 ‘cfv 6561 (class class class)co 7446 Xcixp 8956 Fincfn 9004 1c1 11231 + caddc 11233 +∞cpnf 11370 -∞cmnf 11371 ℝ^*cxr 11372 − cmin 11571 (,)cioo 13506 TopOpenctopn 17624 Topctop 23244 ℝ^crrx 25737

This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5236 ax-sep 5253 ax-nul 5264 ax-pow 5332 ax-pr 5396 ax-un 7778 ax-inf2 9672 ax-cnex 11286 ax-resscn 11287 ax-1cn 11288 ax-icn 11289 ax-addcl 11290 ax-addrcl 11291 ax-mulcl 11292 ax-mulrcl 11293 ax-mulcom 11294 ax-addass 11295 ax-mulass 11296 ax-distr 11297 ax-i2m1 11298 ax-1ne0 11299 ax-1rid 11300 ax-rnegex 11301 ax-rrecex 11302 ax-cnre 11303 ax-pre-lttri 11304 ax-pre-lttrn 11305 ax-pre-ltadd 11306 ax-pre-mulgt0 11307 ax-pre-sup 11308 ax-addf 11309 ax-mulf 11310

This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-tp 4593 df-op 4839 df-uni 4871 df-int 4911 df-iun 4956 df-br 5107 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5551 df-eprel 5556 df-po 5564 df-so 5565 df-fr 5609 df-se 5610 df-we 5611 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-res 5668 df-ima 5669 df-pred 6325 df-ord 6386 df-on 6387 df-lim 6388 df-suc 6389 df-iota 6515 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-isom 6570 df-riota 7403 df-ov 7449 df-oprab 7450 df-mpo 7451 df-of 7720 df-om 7905 df-1st 8028 df-2nd 8029 df-supp 8208 df-tpos 8274 df-frecs 8330 df-wrecs 8361 df-recs 8410 df-rdg 8449 df-1o 8507 df-er 8748 df-map 8880 df-ixp 8957 df-en 9005 df-dom 9006 df-sdom 9007 df-fin 9008 df-fsupp 9385 df-sup 9464 df-inf 9465 df-oi 9534 df-card 10050 df-pnf 11375 df-mnf 11376 df-xr 11377 df-ltxr 11378 df-le 11379 df-sub 11573 df-neg 11574 df-div 12004 df-nn 12366 df-2 12435 df-3 12436 df-4 12437 df-5 12438 df-6 12439 df-7 12440 df-8 12441 df-9 12442 df-n0 12637 df-z 12724 df-dec 12845 df-uz 12996 df-q 13106 df-rp 13151 df-xneg 13271 df-xadd 13272 df-xmul 13273 df-ioo 13510 df-ico 13512 df-fz 13670 df-fzo 13819 df-seq 14175 df-exp 14235 df-hash 14505 df-cj 15298 df-re 15299 df-im 15300 df-sqrt 15434 df-abs 15435 df-clim 15687 df-sum 15886 df-struct 17357 df-sets 17374 df-slot 17392 df-ndx 17404 df-base 17420 df-ress 17441 df-plusg 17473 df-mulr 17474 df-starv 17475 df-sca 17476 df-vsca 17477 df-ip 17478 df-tset 17479 df-ple 17480 df-ds 17482 df-unif 17483 df-hom 17484 df-cco 17485 df-rest 17625 df-topn 17626 df-0g 17644 df-gsum 17645 df-topgen 17646 df-prds 17650 df-pws 17652 df-mgm 18848 df-sgrp 18940 df-mnd 18956 df-mhm 19010 df-submnd 19011 df-grp 19179 df-minusg 19180 df-sbg 19181 df-subg 19365 df-ghm 19460 df-cntz 19564 df-cmn 20029 df-abl 20030 df-mgp 20394 df-rng 20408 df-ur 20441 df-ring 20494 df-cring 20495 df-oppr 20600 df-dvdsr 20620 df-unit 20621 df-invr 20651 df-dvr 20664 df-rhm 20735 df-subrng 20831 df-subrg 20855 df-drng 21015 df-field 21016 df-abv 21099 df-staf 21129 df-srng 21130 df-lmod 21170 df-lss 21240 df-lmhm 21330 df-lvec 21411 df-sra 21481 df-rgmod 21482 df-psmet 21703 df-xmet 21704 df-met 21705 df-bl 21706 df-mopn 21707 df-cnfld 21712 df-refld 21944 df-phl 21965 df-dsmm 22071 df-frlm 22086 df-top 23245 df-topon 23262 df-topsp 23284 df-bases 23297 df-xms 24672 df-ms 24673 df-nm 24934 df-ngp 24935 df-tng 24936 df-nrg 24937 df-nlm 24938 df-clm 25417 df-cph 25522 df-tcph 25523 df-rrx 25739

This theorem is used by: ioovonmbl 47902

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