qndenserrn - Mathbox for Glauco Siliprandi

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Theorem qndenserrn 45592

Description: n-dimensional rational numbers are dense in the space of n-dimensional real numbers, with respect to the n-dimensional standard topology. (Contributed by Glauco Siliprandi, 24-Dec-2020.)

**Hypotheses**
Ref	Expression
qndenserrn.i	⊢ (𝜑 → 𝐼 ∈ Fin)
qndenserrn.j	⊢ 𝐽 = (TopOpen‘(ℝ^‘𝐼))

**Assertion**
Ref	Expression
qndenserrn	⊢ (𝜑 → ((cls‘𝐽)‘(ℚ ↑_m 𝐼)) = (ℝ ↑_m 𝐼))

Proof of Theorem qndenserrn Dummy variables 𝑣 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		qndenserrn.i	. . . . 5 ⊢ (𝜑 → 𝐼 ∈ Fin)
2		qndenserrn.j	. . . . . 6 ⊢ 𝐽 = (TopOpen‘(ℝ^‘𝐼))
3	2	rrxtop 45582	. . . . 5 ⊢ (𝐼 ∈ Fin → 𝐽 ∈ Top)
4	1, 3	syl 17	. . . 4 ⊢ (𝜑 → 𝐽 ∈ Top)
5		reex 11203	. . . . . . 7 ⊢ ℝ ∈ V
6		qssre 12947	. . . . . . 7 ⊢ ℚ ⊆ ℝ
7		mapss 8885	. . . . . . 7 ⊢ ((ℝ ∈ V ∧ ℚ ⊆ ℝ) → (ℚ ↑_m 𝐼) ⊆ (ℝ ↑_m 𝐼))
8	5, 6, 7	mp2an 689	. . . . . 6 ⊢ (ℚ ↑_m 𝐼) ⊆ (ℝ ↑_m 𝐼)
9	8	a1i 11	. . . . 5 ⊢ (𝜑 → (ℚ ↑_m 𝐼) ⊆ (ℝ ↑_m 𝐼))
10		eqid 2726	. . . . . . . 8 ⊢ (ℝ^‘𝐼) = (ℝ^‘𝐼)
11		eqid 2726	. . . . . . . 8 ⊢ (Base‘(ℝ^‘𝐼)) = (Base‘(ℝ^‘𝐼))
12	1, 10, 11	rrxbasefi 25293	. . . . . . 7 ⊢ (𝜑 → (Base‘(ℝ^‘𝐼)) = (ℝ ↑_m 𝐼))
13	12	eqcomd 2732	. . . . . 6 ⊢ (𝜑 → (ℝ ↑_m 𝐼) = (Base‘(ℝ^‘𝐼)))
14		rrxtps 45579	. . . . . . 7 ⊢ (𝐼 ∈ Fin → (ℝ^‘𝐼) ∈ TopSp)
15		eqid 2726	. . . . . . . 8 ⊢ (TopOpen‘(ℝ^‘𝐼)) = (TopOpen‘(ℝ^‘𝐼))
16	11, 15	tpsuni 22793	. . . . . . 7 ⊢ ((ℝ^‘𝐼) ∈ TopSp → (Base‘(ℝ^‘𝐼)) = ∪ (TopOpen‘(ℝ^‘𝐼)))
17	1, 14, 16	3syl 18	. . . . . 6 ⊢ (𝜑 → (Base‘(ℝ^‘𝐼)) = ∪ (TopOpen‘(ℝ^‘𝐼)))
18	2	unieqi 4914	. . . . . . . 8 ⊢ ∪ 𝐽 = ∪ (TopOpen‘(ℝ^‘𝐼))
19	18	eqcomi 2735	. . . . . . 7 ⊢ ∪ (TopOpen‘(ℝ^‘𝐼)) = ∪ 𝐽
20	19	a1i 11	. . . . . 6 ⊢ (𝜑 → ∪ (TopOpen‘(ℝ^‘𝐼)) = ∪ 𝐽)
21	13, 17, 20	3eqtrd 2770	. . . . 5 ⊢ (𝜑 → (ℝ ↑_m 𝐼) = ∪ 𝐽)
22	9, 21	sseqtrd 4017	. . . 4 ⊢ (𝜑 → (ℚ ↑_m 𝐼) ⊆ ∪ 𝐽)
23		eqid 2726	. . . . 5 ⊢ ∪ 𝐽 = ∪ 𝐽
24	23	clsss3 22918	. . . 4 ⊢ ((𝐽 ∈ Top ∧ (ℚ ↑_m 𝐼) ⊆ ∪ 𝐽) → ((cls‘𝐽)‘(ℚ ↑_m 𝐼)) ⊆ ∪ 𝐽)
25	4, 22, 24	syl2anc 583	. . 3 ⊢ (𝜑 → ((cls‘𝐽)‘(ℚ ↑_m 𝐼)) ⊆ ∪ 𝐽)
26	21	eqcomd 2732	. . 3 ⊢ (𝜑 → ∪ 𝐽 = (ℝ ↑_m 𝐼))
27	25, 26	sseqtrd 4017	. 2 ⊢ (𝜑 → ((cls‘𝐽)‘(ℚ ↑_m 𝐼)) ⊆ (ℝ ↑_m 𝐼))
28	1	ad2antrr 723	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑣 ∈ 𝐽) ∧ 𝑥 ∈ 𝑣) → 𝐼 ∈ Fin)
29		id 22	. . . . . . . . . . . 12 ⊢ (𝑣 ∈ 𝐽 → 𝑣 ∈ 𝐽)
30	29, 2	eleqtrdi 2837	. . . . . . . . . . 11 ⊢ (𝑣 ∈ 𝐽 → 𝑣 ∈ (TopOpen‘(ℝ^‘𝐼)))
31	30	ad2antlr 724	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑣 ∈ 𝐽) ∧ 𝑥 ∈ 𝑣) → 𝑣 ∈ (TopOpen‘(ℝ^‘𝐼)))
32		ne0i 4329	. . . . . . . . . . 11 ⊢ (𝑥 ∈ 𝑣 → 𝑣 ≠ ∅)
33	32	adantl 481	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑣 ∈ 𝐽) ∧ 𝑥 ∈ 𝑣) → 𝑣 ≠ ∅)
34	28, 15, 31, 33	qndenserrnopn 45591	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑣 ∈ 𝐽) ∧ 𝑥 ∈ 𝑣) → ∃𝑦 ∈ (ℚ ↑_m 𝐼)𝑦 ∈ 𝑣)
35		df-rex 3065	. . . . . . . . 9 ⊢ (∃𝑦 ∈ (ℚ ↑_m 𝐼)𝑦 ∈ 𝑣 ↔ ∃𝑦(𝑦 ∈ (ℚ ↑_m 𝐼) ∧ 𝑦 ∈ 𝑣))
36	34, 35	sylib 217	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑣 ∈ 𝐽) ∧ 𝑥 ∈ 𝑣) → ∃𝑦(𝑦 ∈ (ℚ ↑_m 𝐼) ∧ 𝑦 ∈ 𝑣))
37		simpr 484	. . . . . . . . . . 11 ⊢ ((𝑦 ∈ (ℚ ↑_m 𝐼) ∧ 𝑦 ∈ 𝑣) → 𝑦 ∈ 𝑣)
38		simpl 482	. . . . . . . . . . 11 ⊢ ((𝑦 ∈ (ℚ ↑_m 𝐼) ∧ 𝑦 ∈ 𝑣) → 𝑦 ∈ (ℚ ↑_m 𝐼))
39	37, 38	elind 4189	. . . . . . . . . 10 ⊢ ((𝑦 ∈ (ℚ ↑_m 𝐼) ∧ 𝑦 ∈ 𝑣) → 𝑦 ∈ (𝑣 ∩ (ℚ ↑_m 𝐼)))
40	39	a1i 11	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑣 ∈ 𝐽) ∧ 𝑥 ∈ 𝑣) → ((𝑦 ∈ (ℚ ↑_m 𝐼) ∧ 𝑦 ∈ 𝑣) → 𝑦 ∈ (𝑣 ∩ (ℚ ↑_m 𝐼))))
41	40	eximdv 1912	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑣 ∈ 𝐽) ∧ 𝑥 ∈ 𝑣) → (∃𝑦(𝑦 ∈ (ℚ ↑_m 𝐼) ∧ 𝑦 ∈ 𝑣) → ∃𝑦 𝑦 ∈ (𝑣 ∩ (ℚ ↑_m 𝐼))))
42	36, 41	mpd 15	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑣 ∈ 𝐽) ∧ 𝑥 ∈ 𝑣) → ∃𝑦 𝑦 ∈ (𝑣 ∩ (ℚ ↑_m 𝐼)))
43		n0 4341	. . . . . . 7 ⊢ ((𝑣 ∩ (ℚ ↑_m 𝐼)) ≠ ∅ ↔ ∃𝑦 𝑦 ∈ (𝑣 ∩ (ℚ ↑_m 𝐼)))
44	42, 43	sylibr 233	. . . . . 6 ⊢ (((𝜑 ∧ 𝑣 ∈ 𝐽) ∧ 𝑥 ∈ 𝑣) → (𝑣 ∩ (ℚ ↑_m 𝐼)) ≠ ∅)
45	44	ex 412	. . . . 5 ⊢ ((𝜑 ∧ 𝑣 ∈ 𝐽) → (𝑥 ∈ 𝑣 → (𝑣 ∩ (ℚ ↑_m 𝐼)) ≠ ∅))
46	45	adantlr 712	. . . 4 ⊢ (((𝜑 ∧ 𝑥 ∈ (ℝ ↑_m 𝐼)) ∧ 𝑣 ∈ 𝐽) → (𝑥 ∈ 𝑣 → (𝑣 ∩ (ℚ ↑_m 𝐼)) ≠ ∅))
47	46	ralrimiva 3140	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℝ ↑_m 𝐼)) → ∀𝑣 ∈ 𝐽 (𝑥 ∈ 𝑣 → (𝑣 ∩ (ℚ ↑_m 𝐼)) ≠ ∅))
48	4	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℝ ↑_m 𝐼)) → 𝐽 ∈ Top)
49	22	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℝ ↑_m 𝐼)) → (ℚ ↑_m 𝐼) ⊆ ∪ 𝐽)
50		simpr 484	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℝ ↑_m 𝐼)) → 𝑥 ∈ (ℝ ↑_m 𝐼))
51	21	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℝ ↑_m 𝐼)) → (ℝ ↑_m 𝐼) = ∪ 𝐽)
52	50, 51	eleqtrd 2829	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℝ ↑_m 𝐼)) → 𝑥 ∈ ∪ 𝐽)
53	23	elcls 22932	. . . 4 ⊢ ((𝐽 ∈ Top ∧ (ℚ ↑_m 𝐼) ⊆ ∪ 𝐽 ∧ 𝑥 ∈ ∪ 𝐽) → (𝑥 ∈ ((cls‘𝐽)‘(ℚ ↑_m 𝐼)) ↔ ∀𝑣 ∈ 𝐽 (𝑥 ∈ 𝑣 → (𝑣 ∩ (ℚ ↑_m 𝐼)) ≠ ∅)))
54	48, 49, 52, 53	syl3anc 1368	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℝ ↑_m 𝐼)) → (𝑥 ∈ ((cls‘𝐽)‘(ℚ ↑_m 𝐼)) ↔ ∀𝑣 ∈ 𝐽 (𝑥 ∈ 𝑣 → (𝑣 ∩ (ℚ ↑_m 𝐼)) ≠ ∅)))
55	47, 54	mpbird 257	. 2 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℝ ↑_m 𝐼)) → 𝑥 ∈ ((cls‘𝐽)‘(ℚ ↑_m 𝐼)))
56	27, 55	eqelssd 3998	1 ⊢ (𝜑 → ((cls‘𝐽)‘(ℚ ↑_m 𝐼)) = (ℝ ↑_m 𝐼))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1533 ∃wex 1773 ∈ wcel 2098 ≠ wne 2934 ∀wral 3055 ∃wrex 3064 Vcvv 3468 ∩ cin 3942 ⊆ wss 3943 ∅c0 4317 ∪ cuni 4902 ‘cfv 6537 (class class class)co 7405 ↑_m cmap 8822 Fincfn 8941 ℝcr 11111 ℚcq 12936 Basecbs 17153 TopOpenctopn 17376 Topctop 22750 TopSpctps 22789 clsccl 22877 ℝ^crrx 25266

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7722 ax-inf2 9638 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190 ax-addf 11191 ax-mulf 11192

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-rmo 3370 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-tp 4628 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-iin 4993 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-se 5625 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6294 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6489 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-isom 6546 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-of 7667 df-om 7853 df-1st 7974 df-2nd 7975 df-supp 8147 df-tpos 8212 df-frecs 8267 df-wrecs 8298 df-recs 8372 df-rdg 8411 df-1o 8467 df-er 8705 df-map 8824 df-ixp 8894 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-fsupp 9364 df-sup 9439 df-inf 9440 df-oi 9507 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-2 12279 df-3 12280 df-4 12281 df-5 12282 df-6 12283 df-7 12284 df-8 12285 df-9 12286 df-n0 12477 df-z 12563 df-dec 12682 df-uz 12827 df-q 12937 df-rp 12981 df-xneg 13098 df-xadd 13099 df-xmul 13100 df-ioo 13334 df-ico 13336 df-fz 13491 df-fzo 13634 df-seq 13973 df-exp 14033 df-hash 14296 df-cj 15052 df-re 15053 df-im 15054 df-sqrt 15188 df-abs 15189 df-clim 15438 df-sum 15639 df-struct 17089 df-sets 17106 df-slot 17124 df-ndx 17136 df-base 17154 df-ress 17183 df-plusg 17219 df-mulr 17220 df-starv 17221 df-sca 17222 df-vsca 17223 df-ip 17224 df-tset 17225 df-ple 17226 df-ds 17228 df-unif 17229 df-hom 17230 df-cco 17231 df-rest 17377 df-topn 17378 df-0g 17396 df-gsum 17397 df-topgen 17398 df-prds 17402 df-pws 17404 df-mgm 18573 df-sgrp 18652 df-mnd 18668 df-mhm 18713 df-submnd 18714 df-grp 18866 df-minusg 18867 df-sbg 18868 df-subg 19050 df-ghm 19139 df-cntz 19233 df-cmn 19702 df-abl 19703 df-mgp 20040 df-rng 20058 df-ur 20087 df-ring 20140 df-cring 20141 df-oppr 20236 df-dvdsr 20259 df-unit 20260 df-invr 20290 df-dvr 20303 df-rhm 20374 df-subrng 20446 df-subrg 20471 df-drng 20589 df-field 20590 df-abv 20660 df-staf 20688 df-srng 20689 df-lmod 20708 df-lss 20779 df-lmhm 20870 df-lvec 20951 df-sra 21021 df-rgmod 21022 df-psmet 21232 df-xmet 21233 df-met 21234 df-bl 21235 df-mopn 21236 df-cnfld 21241 df-refld 21498 df-phl 21519 df-dsmm 21627 df-frlm 21642 df-top 22751 df-topon 22768 df-topsp 22790 df-bases 22804 df-cld 22878 df-ntr 22879 df-cls 22880 df-xms 24181 df-ms 24182 df-nm 24446 df-ngp 24447 df-tng 24448 df-nrg 24449 df-nlm 24450 df-clm 24945 df-cph 25051 df-tcph 25052 df-rrx 25268

This theorem is referenced by: (None)

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