Theorem lmbr2 20873

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 20872	. 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 11566	. . . . . . . 8 ⊢ ℤ≥:ℤ⟶𝒫 ℤ
4		ffn 5958	. . . . . . . 8 ⊢ (ℤ≥:ℤ⟶𝒫 ℤ → ℤ≥ Fn ℤ)
5		reseq2 5312	. . . . . . . . . 10 ⊢ (𝑧 = (ℤ≥‘𝑗) → (𝐹 ↾ 𝑧) = (𝐹 ↾ (ℤ≥‘𝑗)))
6		id 22	. . . . . . . . . 10 ⊢ (𝑧 = (ℤ≥‘𝑗) → 𝑧 = (ℤ≥‘𝑗))
7	5, 6	feq12d 5946	. . . . . . . . 9 ⊢ (𝑧 = (ℤ≥‘𝑗) → ((𝐹 ↾ 𝑧):𝑧⟶𝑢 ↔ (𝐹 ↾ (ℤ≥‘𝑗)):(ℤ≥‘𝑗)⟶𝑢))
8	7	rexrn 6269	. . . . . . . 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 7763	. . . . . . . . . . 11 ⊢ (𝐹 ∈ (𝑋 ↑pm ℂ) → Fun 𝐹)
11	10	ad2antrl 760	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋)) → Fun 𝐹)
12		ffvresb 6301	. . . . . . . . . 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 3034	. . . . . . . 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 480	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝐹 ∈ (𝑋 ↑pm ℂ) ∧ 𝑃 ∈ 𝑋)) → 𝑀 ∈ ℤ)
17		lmbr2.4	. . . . . . . . . 10 ⊢ 𝑍 = (ℤ≥‘𝑀)
18	17	rexuz3 13936	. . . . . . . . 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 270	. . . . . . 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 271	. . . . . 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 329	. . . . 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 2969	. . . 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 671	. . 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 1033	. . 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 1033	. . 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 302	. 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 267	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 195   ∧ wa 383   ∧ w3a 1031   = wceq 1475   ∈ wcel 1977  ∀wral 2896  ∃wrex 2897  𝒫 cpw 4108   class class class wbr 4583  dom cdm 5038  ran crn 5039   ↾ cres 5040  Fun wfun 5798   Fn wfn 5799  ⟶wf 5800  ‘cfv 5804  (class class class)co 6549   ↑_pm cpm 7745  ℂcc 9813  ℤcz 11254  ℤ_≥cuz 11563  TopOnctopon 20518  ⇝_𝑡clm 20840

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-pre-lttri 9889  ax-pre-lttrn 9890

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-op 4132  df-uni 4373  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-id 4953  df-po 4959  df-so 4960  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-1st 7059  df-2nd 7060  df-er 7629  df-pm 7747  df-en 7842  df-dom 7843  df-sdom 7844  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-neg 10148  df-z 11255  df-uz 11564  df-top 20521  df-topon 20523  df-lm 20843

This theorem is referenced by:  lmbrf  20874  lmcvg  20876  lmres  20914  lmcls  20916  lmcnp  20918