Theorem lmbr2 21063

Description: Express the binary relation "sequence 𝐹 converges to point 𝑃 " in a metric space using an arbitrary upper set of integers. (Contributed by Mario Carneiro, 14-Nov-2013.)

Hypotheses

Ref	Expression
lmbr.2	⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑋))
lmbr2.4	⊢ 𝑍 = (ℤ≥‘𝑀)
lmbr2.5	⊢ (𝜑 → 𝑀 ∈ ℤ)

Assertion

Ref	Expression
lmbr2	⊢ (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,𝑘,𝑢,𝐹   𝑗,𝐽,𝑘,𝑢   𝜑,𝑗,𝑘,𝑢   𝑗,𝑍,𝑘,𝑢   𝑗,𝑀   𝑃,𝑗,𝑘,𝑢   𝑗,𝑋,𝑘,𝑢

Allowed substitution hints:   𝑀(𝑢,𝑘)

Proof of Theorem lmbr2

Dummy variable 𝑧 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		lmbr.2	. . 3 ⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑋))
2	1	lmbr 21062	. 2 ⊢ (𝜑 → (𝐹(⇝𝑡‘𝐽)𝑃 ↔ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋 ∧ ∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑧 ∈ ran ℤ≥(𝐹 ↾ 𝑧):𝑧⟶𝑢))))
3		uzf 11690	. . . . . . . 8 ⊢ ℤ≥:ℤ⟶𝒫 ℤ
4		ffn 6045	. . . . . . . 8 ⊢ (ℤ≥:ℤ⟶𝒫 ℤ → ℤ≥ Fn ℤ)
5		reseq2 5391	. . . . . . . . . 10 ⊢ (𝑧 = (ℤ≥‘𝑗) → (𝐹 ↾ 𝑧) = (𝐹 ↾ (ℤ≥‘𝑗)))
6		id 22	. . . . . . . . . 10 ⊢ (𝑧 = (ℤ≥‘𝑗) → 𝑧 = (ℤ≥‘𝑗))
7	5, 6	feq12d 6033	. . . . . . . . 9 ⊢ (𝑧 = (ℤ≥‘𝑗) → ((𝐹 ↾ 𝑧):𝑧⟶𝑢 ↔ (𝐹 ↾ (ℤ≥‘𝑗)):(ℤ≥‘𝑗)⟶𝑢))
8	7	rexrn 6361	. . . . . . . 8 ⊢ (ℤ≥ Fn ℤ → (∃𝑧 ∈ ran ℤ≥(𝐹 ↾ 𝑧):𝑧⟶𝑢 ↔ ∃𝑗 ∈ ℤ (𝐹 ↾ (ℤ≥‘𝑗)):(ℤ≥‘𝑗)⟶𝑢))
9	3, 4, 8	mp2b 10	. . . . . . 7 ⊢ (∃𝑧 ∈ ran ℤ≥(𝐹 ↾ 𝑧):𝑧⟶𝑢 ↔ ∃𝑗 ∈ ℤ (𝐹 ↾ (ℤ≥‘𝑗)):(ℤ≥‘𝑗)⟶𝑢)
10		pmfun 7877	. . . . . . . . . . 11 ⊢ (𝐹 ∈ (𝑋 ↑pm ℂ) → Fun 𝐹)
11	10	ad2antrl 764	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋)) → Fun 𝐹)
12		ffvresb 6394	. . . . . . . . . 10 ⊢ (Fun 𝐹 → ((𝐹 ↾ (ℤ≥‘𝑗)):(ℤ≥‘𝑗)⟶𝑢 ↔ ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢)))
13	11, 12	syl 17	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋)) → ((𝐹 ↾ (ℤ≥‘𝑗)):(ℤ≥‘𝑗)⟶𝑢 ↔ ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢)))
14	13	rexbidv 3052	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋)) → (∃𝑗 ∈ ℤ (𝐹 ↾ (ℤ≥‘𝑗)):(ℤ≥‘𝑗)⟶𝑢 ↔ ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢)))
15		lmbr2.5	. . . . . . . . . 10 ⊢ (𝜑 → 𝑀 ∈ ℤ)
16	15	adantr 481	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋)) → 𝑀 ∈ ℤ)
17		lmbr2.4	. . . . . . . . . 10 ⊢ 𝑍 = (ℤ≥‘𝑀)
18	17	rexuz3 14088	. . . . . . . . 9 ⊢ (𝑀 ∈ ℤ → (∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢) ↔ ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢)))
19	16, 18	syl 17	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋)) → (∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢) ↔ ∃𝑗 ∈ ℤ ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢)))
20	14, 19	bitr4d 271	. . . . . . 7 ⊢ ((𝜑 ∧ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋)) → (∃𝑗 ∈ ℤ (𝐹 ↾ (ℤ≥‘𝑗)):(ℤ≥‘𝑗)⟶𝑢 ↔ ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢)))
21	9, 20	syl5bb 272	. . . . . 6 ⊢ ((𝜑 ∧ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋)) → (∃𝑧 ∈ ran ℤ≥(𝐹 ↾ 𝑧):𝑧⟶𝑢 ↔ ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢)))
22	21	imbi2d 330	. . . . 5 ⊢ ((𝜑 ∧ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋)) → ((𝑃 ∈ 𝑢 → ∃𝑧 ∈ ran ℤ≥(𝐹 ↾ 𝑧):𝑧⟶𝑢) ↔ (𝑃 ∈ 𝑢 → ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢))))
23	22	ralbidv 2986	. . . 4 ⊢ ((𝜑 ∧ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋)) → (∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑧 ∈ ran ℤ≥(𝐹 ↾ 𝑧):𝑧⟶𝑢) ↔ ∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢))))
24	23	pm5.32da 673	. . 3 ⊢ (𝜑 → (((𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋) ∧ ∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑧 ∈ ran ℤ≥(𝐹 ↾ 𝑧):𝑧⟶𝑢)) ↔ ((𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋) ∧ ∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢)))))
25		df-3an 1039	. . 3 ⊢ ((𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋 ∧ ∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑧 ∈ ran ℤ≥(𝐹 ↾ 𝑧):𝑧⟶𝑢)) ↔ ((𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋) ∧ ∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑧 ∈ ran ℤ≥(𝐹 ↾ 𝑧):𝑧⟶𝑢)))
26		df-3an 1039	. . 3 ⊢ ((𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋 ∧ ∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢))) ↔ ((𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋) ∧ ∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢))))
27	24, 25, 26	3bitr4g 303	. 2 ⊢ (𝜑 → ((𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋 ∧ ∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑧 ∈ ran ℤ≥(𝐹 ↾ 𝑧):𝑧⟶𝑢)) ↔ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋 ∧ ∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)(𝑘 ∈ dom 𝐹 ∧ (𝐹‘𝑘) ∈ 𝑢)))))
28	2, 27	bitrd 268	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 196   ∧ wa 384   ∧ w3a 1037   = wceq 1483   ∈ wcel 1990  ∀wral 2912  ∃wrex 2913  𝒫 cpw 4158   class class class wbr 4653  dom cdm 5114  ran crn 5115   ↾ cres 5116  Fun wfun 5882   Fn wfn 5883  ⟶wf 5884  ‘cfv 5888  (class class class)co 6650   ↑_pm cpm 7858  ℂcc 9934  ℤcz 11377  ℤ_≥cuz 11687  TopOnctopon 20715  ⇝_𝑡clm 21030

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-cnex 9992  ax-resscn 9993  ax-pre-lttri 10010  ax-pre-lttrn 10011

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-po 5035  df-so 5036  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-1st 7168  df-2nd 7169  df-er 7742  df-pm 7860  df-en 7956  df-dom 7957  df-sdom 7958  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-neg 10269  df-z 11378  df-uz 11688  df-top 20699  df-topon 20716  df-lm 21033

This theorem is referenced by:  lmbrf  21064  lmcvg  21066  lmres  21104  lmcls  21106  lmcnp  21108  lmbr3v  39977