Theorem lmconst 23209

Description: A constant sequence converges to its value. (Contributed by NM, 8-Nov-2007.) (Revised by Mario Carneiro, 14-Nov-2013.)

Hypothesis

Ref	Expression
lmconst.2	⊢ 𝑍 = (ℤ≥‘𝑀)

Assertion

Ref	Expression
lmconst	⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑀 ∈ ℤ) → (𝑍 × {𝑃})(⇝𝑡‘𝐽)𝑃)

Proof of Theorem lmconst

Dummy variables 𝑗 𝑘 𝑢 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		simp2 1138	. 2 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑀 ∈ ℤ) → 𝑃 ∈ 𝑋)
2		simp3 1139	. . . . . 6 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑀 ∈ ℤ) → 𝑀 ∈ ℤ)
3		uzid 12770	. . . . . 6 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ (ℤ≥‘𝑀))
4	2, 3	syl 17	. . . . 5 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑀 ∈ ℤ) → 𝑀 ∈ (ℤ≥‘𝑀))
5		lmconst.2	. . . . 5 ⊢ 𝑍 = (ℤ≥‘𝑀)
6	4, 5	eleqtrrdi 2848	. . . 4 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑀 ∈ ℤ) → 𝑀 ∈ 𝑍)
7		idd 24	. . . . 5 ⊢ (((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑀 ∈ ℤ) ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (𝑃 ∈ 𝑢 → 𝑃 ∈ 𝑢))
8	7	ralrimdva 3137	. . . 4 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑀 ∈ ℤ) → (𝑃 ∈ 𝑢 → ∀𝑘 ∈ (ℤ≥‘𝑀)𝑃 ∈ 𝑢))
9		fveq2 6835	. . . . . 6 ⊢ (𝑗 = 𝑀 → (ℤ≥‘𝑗) = (ℤ≥‘𝑀))
10	9	raleqdv 3297	. . . . 5 ⊢ (𝑗 = 𝑀 → (∀𝑘 ∈ (ℤ≥‘𝑗)𝑃 ∈ 𝑢 ↔ ∀𝑘 ∈ (ℤ≥‘𝑀)𝑃 ∈ 𝑢))
11	10	rspcev 3577	. . . 4 ⊢ ((𝑀 ∈ 𝑍 ∧ ∀𝑘 ∈ (ℤ≥‘𝑀)𝑃 ∈ 𝑢) → ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)𝑃 ∈ 𝑢)
12	6, 8, 11	syl6an 685	. . 3 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑀 ∈ ℤ) → (𝑃 ∈ 𝑢 → ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)𝑃 ∈ 𝑢))
13	12	ralrimivw 3133	. 2 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑀 ∈ ℤ) → ∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)𝑃 ∈ 𝑢))
14		simp1 1137	. . 3 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑀 ∈ ℤ) → 𝐽 ∈ (TopOn‘𝑋))
15		fconst6g 6724	. . . 4 ⊢ (𝑃 ∈ 𝑋 → (𝑍 × {𝑃}):𝑍⟶𝑋)
16	1, 15	syl 17	. . 3 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑀 ∈ ℤ) → (𝑍 × {𝑃}):𝑍⟶𝑋)
17		fvconst2g 7150	. . . 4 ⊢ ((𝑃 ∈ 𝑋 ∧ 𝑘 ∈ 𝑍) → ((𝑍 × {𝑃})‘𝑘) = 𝑃)
18	1, 17	sylan 581	. . 3 ⊢ (((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑀 ∈ ℤ) ∧ 𝑘 ∈ 𝑍) → ((𝑍 × {𝑃})‘𝑘) = 𝑃)
19	14, 5, 2, 16, 18	lmbrf 23208	. 2 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑀 ∈ ℤ) → ((𝑍 × {𝑃})(⇝𝑡‘𝐽)𝑃 ↔ (𝑃 ∈ 𝑋 ∧ ∀𝑢 ∈ 𝐽 (𝑃 ∈ 𝑢 → ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)𝑃 ∈ 𝑢))))
20	1, 13, 19	mpbir2and 714	1 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑀 ∈ ℤ) → (𝑍 × {𝑃})(⇝𝑡‘𝐽)𝑃)

Syntax hints:   → wi 4   ∧ wa 395   ∧ w3a 1087   = wceq 1542   ∈ wcel 2114  ∀wral 3052  ∃wrex 3061  {csn 4581   class class class wbr 5099   × cxp 5623  ⟶wf 6489  ‘cfv 6493  ℤcz 12492  ℤ_≥cuz 12755  TopOnctopon 22858  ⇝_𝑡clm 23174

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-sep 5242  ax-nul 5252  ax-pow 5311  ax-pr 5378  ax-un 7682  ax-cnex 11086  ax-resscn 11087  ax-pre-lttri 11104  ax-pre-lttrn 11105

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3or 1088  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-nel 3038  df-ral 3053  df-rex 3062  df-rab 3401  df-v 3443  df-sbc 3742  df-csb 3851  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-nul 4287  df-if 4481  df-pw 4557  df-sn 4582  df-pr 4584  df-op 4588  df-uni 4865  df-iun 4949  df-br 5100  df-opab 5162  df-mpt 5181  df-id 5520  df-po 5533  df-so 5534  df-xp 5631  df-rel 5632  df-cnv 5633  df-co 5634  df-dm 5635  df-rn 5636  df-res 5637  df-ima 5638  df-iota 6449  df-fun 6495  df-fn 6496  df-f 6497  df-f1 6498  df-fo 6499  df-f1o 6500  df-fv 6501  df-ov 7363  df-oprab 7364  df-mpo 7365  df-1st 7935  df-2nd 7936  df-er 8637  df-pm 8770  df-en 8888  df-dom 8889  df-sdom 8890  df-pnf 11172  df-mnf 11173  df-xr 11174  df-ltxr 11175  df-le 11176  df-neg 11371  df-z 12493  df-uz 12756  df-top 22842  df-topon 22859  df-lm 23177

This theorem is referenced by:  hlim0  31293  occllem  31361  nlelchi  32119  hmopidmchi  32209  esumcvg  34224  xlimconst  46105