Theorem lmbr3 45872

Description: Express the binary relation "sequence 𝐹 converges to point 𝑃 " in a metric space using an arbitrary upper set of integers. (Contributed by Glauco Siliprandi, 5-Feb-2022.)

Hypotheses

Ref	Expression
lmbr3.1	⊢ Ⅎ𝑘𝐹
lmbr3.2	⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑋))

Assertion

Ref	Expression
lmbr3	⊢ (𝜑 → (𝐹(⇝𝑡‘𝐽)𝑃 ↔ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋 ∧ ∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢)))))

Distinct variable groups:   𝑗,𝐹,𝑢   𝑢,𝐽   𝑢,𝑃   𝑗,𝑘,𝑢

Allowed substitution hints:   𝜑(𝑢,𝑗,𝑘)   𝑃(𝑗,𝑘)   𝐹(𝑘)   𝐽(𝑗,𝑘)   𝑋(𝑢,𝑗,𝑘)

Proof of Theorem lmbr3

Dummy variables 𝑖 𝑙 𝑣 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		lmbr3.2	. . 3 ⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑋))
2	1	lmbr3v 45870	. 2 ⊢ (𝜑 → (𝐹(⇝𝑡‘𝐽)𝑃 ↔ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋 ∧ ∀𝑣 ∈ 𝐽 (𝑃 ∈ 𝑣 → ∃𝑖 ∈ ℤ ∀𝑙 ∈ (ℤ≥‘𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹‘𝑙) ∈ 𝑣)))))
3		eleq2w 2817	. . . . 5 ⊢ (𝑣 = 𝑢 → (𝑃 ∈ 𝑣 ↔ 𝑃 ∈ 𝑢))
4		eleq2w 2817	. . . . . . . 8 ⊢ (𝑣 = 𝑢 → ((𝐹‘𝑙) ∈ 𝑣 ↔ (𝐹‘𝑙) ∈ 𝑢))
5	4	anbi2d 630	. . . . . . 7 ⊢ (𝑣 = 𝑢 → ((𝑙 ∈ dom 𝐹 ∧ (𝐹‘𝑙) ∈ 𝑣) ↔ (𝑙 ∈ dom 𝐹 ∧ (𝐹‘𝑙) ∈ 𝑢)))
6	5	rexralbidv 3199	. . . . . 6 ⊢ (𝑣 = 𝑢 → (∃𝑖 ∈ ℤ ∀𝑙 ∈ (ℤ≥‘𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹‘𝑙) ∈ 𝑣) ↔ ∃𝑖 ∈ ℤ ∀𝑙 ∈ (ℤ≥‘𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹‘𝑙) ∈ 𝑢)))
7		fveq2 6830	. . . . . . . . 9 ⊢ (𝑖 = 𝑗 → (ℤ≥‘𝑖) = (ℤ≥‘𝑗))
8	7	raleqdv 3293	. . . . . . . 8 ⊢ (𝑖 = 𝑗 → (∀𝑙 ∈ (ℤ≥‘𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹‘𝑙) ∈ 𝑢) ↔ ∀𝑙 ∈ (ℤ≥‘𝑗)(𝑙 ∈ dom 𝐹 ∧ (𝐹‘𝑙) ∈ 𝑢)))
9		nfcv 2895	. . . . . . . . . . 11 ⊢ Ⅎ𝑘𝑙
10		lmbr3.1	. . . . . . . . . . . 12 ⊢ Ⅎ𝑘𝐹
11	10	nfdm 5897	. . . . . . . . . . 11 ⊢ Ⅎ𝑘dom 𝐹
12	9, 11	nfel 2910	. . . . . . . . . 10 ⊢ Ⅎ𝑘 𝑙 ∈ dom 𝐹
13	10, 9	nffv 6840	. . . . . . . . . . 11 ⊢ Ⅎ𝑘(𝐹‘𝑙)
14		nfcv 2895	. . . . . . . . . . 11 ⊢ Ⅎ𝑘𝑢
15	13, 14	nfel 2910	. . . . . . . . . 10 ⊢ Ⅎ𝑘(𝐹‘𝑙) ∈ 𝑢
16	12, 15	nfan 1900	. . . . . . . . 9 ⊢ Ⅎ𝑘(𝑙 ∈ dom 𝐹 ∧ (𝐹‘𝑙) ∈ 𝑢)
17		nfv 1915	. . . . . . . . 9 ⊢ Ⅎ𝑙(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢)
18		eleq1w 2816	. . . . . . . . . 10 ⊢ (𝑙 = 𝑘 → (𝑙 ∈ dom 𝐹 ↔ 𝑘 ∈ dom 𝐹))
19		fveq2 6830	. . . . . . . . . . 11 ⊢ (𝑙 = 𝑘 → (𝐹‘𝑙) = (𝐹‘𝑘))
20	19	eleq1d 2818	. . . . . . . . . 10 ⊢ (𝑙 = 𝑘 → ((𝐹‘𝑙) ∈ 𝑢 ↔ (𝐹‘𝑘) ∈ 𝑢))
21	18, 20	anbi12d 632	. . . . . . . . 9 ⊢ (𝑙 = 𝑘 → ((𝑙 ∈ dom 𝐹 ∧ (𝐹‘𝑙) ∈ 𝑢) ↔ (𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢)))
22	16, 17, 21	cbvralw 3275	. . . . . . . 8 ⊢ (∀𝑙 ∈ (ℤ≥‘𝑗)(𝑙 ∈ dom 𝐹 ∧ (𝐹‘𝑙) ∈ 𝑢) ↔ ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢))
23	8, 22	bitrdi 287	. . . . . . 7 ⊢ (𝑖 = 𝑗 → (∀𝑙 ∈ (ℤ≥‘𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹‘𝑙) ∈ 𝑢) ↔ ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢)))
24	23	cbvrexvw 3212	. . . . . 6 ⊢ (∃𝑖 ∈ ℤ ∀𝑙 ∈ (ℤ≥‘𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹‘𝑙) ∈ 𝑢) ↔ ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢))
25	6, 24	bitrdi 287	. . . . 5 ⊢ (𝑣 = 𝑢 → (∃𝑖 ∈ ℤ ∀𝑙 ∈ (ℤ≥‘𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹‘𝑙) ∈ 𝑣) ↔ ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢)))
26	3, 25	imbi12d 344	. . . 4 ⊢ (𝑣 = 𝑢 → ((𝑃 ∈ 𝑣 → ∃𝑖 ∈ ℤ ∀𝑙 ∈ (ℤ≥‘𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹‘𝑙) ∈ 𝑣)) ↔ (𝑃 ∈ 𝑢 → ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢))))
27	26	cbvralvw 3211	. . 3 ⊢ (∀𝑣 ∈ 𝐽 (𝑃 ∈ 𝑣 → ∃𝑖 ∈ ℤ ∀𝑙 ∈ (ℤ≥‘𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹‘𝑙) ∈ 𝑣)) ↔ ∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢)))
28	27	3anbi3i 1159	. 2 ⊢ ((𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋 ∧ ∀𝑣 ∈ 𝐽 (𝑃 ∈ 𝑣 → ∃𝑖 ∈ ℤ ∀𝑙 ∈ (ℤ≥‘𝑖)(𝑙 ∈ dom 𝐹 ∧ (𝐹‘𝑙) ∈ 𝑣))) ↔ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋 ∧ ∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢))))
29	2, 28	bitrdi 287	1 ⊢ (𝜑 → (𝐹(⇝𝑡‘𝐽)𝑃 ↔ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋 ∧ ∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢)))))

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   ∧ w3a 1086   ∈ wcel 2113  Ⅎwnfc 2880  ∀wral 3048  ∃wrex 3057   class class class wbr 5095  dom cdm 5621  ‘cfv 6488  (class class class)co 7354   ↑_pm cpm 8759  ℂcc 11013  ℤcz 12477  ℤ_≥cuz 12740  TopOnctopon 22828  ⇝_𝑡clm 23144

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2182  ax-ext 2705  ax-sep 5238  ax-nul 5248  ax-pow 5307  ax-pr 5374  ax-un 7676  ax-cnex 11071  ax-resscn 11072  ax-1cn 11073  ax-addrcl 11076  ax-rnegex 11086  ax-cnre 11088  ax-pre-lttri 11089  ax-pre-lttrn 11090

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2537  df-eu 2566  df-clab 2712  df-cleq 2725  df-clel 2808  df-nfc 2882  df-ne 2930  df-nel 3034  df-ral 3049  df-rex 3058  df-rab 3397  df-v 3439  df-sbc 3738  df-csb 3847  df-dif 3901  df-un 3903  df-in 3905  df-ss 3915  df-nul 4283  df-if 4477  df-pw 4553  df-sn 4578  df-pr 4580  df-op 4584  df-uni 4861  df-iun 4945  df-br 5096  df-opab 5158  df-mpt 5177  df-id 5516  df-po 5529  df-so 5530  df-xp 5627  df-rel 5628  df-cnv 5629  df-co 5630  df-dm 5631  df-rn 5632  df-res 5633  df-ima 5634  df-iota 6444  df-fun 6490  df-fn 6491  df-f 6492  df-f1 6493  df-fo 6494  df-f1o 6495  df-fv 6496  df-ov 7357  df-oprab 7358  df-mpo 7359  df-1st 7929  df-2nd 7930  df-er 8630  df-pm 8761  df-en 8878  df-dom 8879  df-sdom 8880  df-pnf 11157  df-mnf 11158  df-xr 11159  df-ltxr 11160  df-le 11161  df-neg 11356  df-z 12478  df-uz 12741  df-top 22812  df-topon 22829  df-lm 23147

This theorem is referenced by:  xlimbr  45952  xlimmnfvlem1  45957  xlimmnfvlem2  45958  xlimpnfvlem1  45961  xlimpnfvlem2  45962