| Mathbox for Glauco Siliprandi |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > xlimconst2 | Structured version Visualization version GIF version | ||
| Description: A sequence that eventually becomes constant, converges to its constant value (w.r.t. the standard topology on the extended reals). (Contributed by Glauco Siliprandi, 5-Feb-2022.) |
| Ref | Expression |
|---|---|
| xlimconst2.p | ⊢ Ⅎ𝑘𝜑 |
| xlimconst2.k | ⊢ Ⅎ𝑘𝐹 |
| xlimconst2.z | ⊢ 𝑍 = (ℤ≥‘𝑀) |
| xlimconst2.f | ⊢ (𝜑 → 𝐹:𝑍⟶ℝ*) |
| xlimconst2.n | ⊢ (𝜑 → 𝑁 ∈ 𝑍) |
| xlimconst2.a | ⊢ (𝜑 → 𝐴 ∈ ℝ*) |
| xlimconst2.e | ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑁)) → (𝐹‘𝑘) = 𝐴) |
| Ref | Expression |
|---|---|
| xlimconst2 | ⊢ (𝜑 → 𝐹~~>*𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xlimconst2.p | . . 3 ⊢ Ⅎ𝑘𝜑 | |
| 2 | xlimconst2.k | . . . 4 ⊢ Ⅎ𝑘𝐹 | |
| 3 | nfcv 2927 | . . . 4 ⊢ Ⅎ𝑘(ℤ≥‘𝑁) | |
| 4 | 2, 3 | nfres 5982 | . . 3 ⊢ Ⅎ𝑘(𝐹 ↾ (ℤ≥‘𝑁)) |
| 5 | xlimconst2.z | . . . 4 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
| 6 | xlimconst2.n | . . . 4 ⊢ (𝜑 → 𝑁 ∈ 𝑍) | |
| 7 | 5, 6 | eluzelz2d 46160 | . . 3 ⊢ (𝜑 → 𝑁 ∈ ℤ) |
| 8 | eqid 2765 | . . 3 ⊢ (ℤ≥‘𝑁) = (ℤ≥‘𝑁) | |
| 9 | xlimconst2.f | . . . . 5 ⊢ (𝜑 → 𝐹:𝑍⟶ℝ*) | |
| 10 | 9 | ffnd 6710 | . . . 4 ⊢ (𝜑 → 𝐹 Fn 𝑍) |
| 11 | 5, 6 | uzssd2 46164 | . . . 4 ⊢ (𝜑 → (ℤ≥‘𝑁) ⊆ 𝑍) |
| 12 | 10, 11 | fnssresd 6663 | . . 3 ⊢ (𝜑 → (𝐹 ↾ (ℤ≥‘𝑁)) Fn (ℤ≥‘𝑁)) |
| 13 | xlimconst2.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ*) | |
| 14 | fvres 6904 | . . . . 5 ⊢ (𝑘 ∈ (ℤ≥‘𝑁) → ((𝐹 ↾ (ℤ≥‘𝑁))‘𝑘) = (𝐹‘𝑘)) | |
| 15 | 14 | adantl 487 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑁)) → ((𝐹 ↾ (ℤ≥‘𝑁))‘𝑘) = (𝐹‘𝑘)) |
| 16 | xlimconst2.e | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑁)) → (𝐹‘𝑘) = 𝐴) | |
| 17 | 15, 16 | eqtrd 2800 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑁)) → ((𝐹 ↾ (ℤ≥‘𝑁))‘𝑘) = 𝐴) |
| 18 | 1, 4, 7, 8, 12, 13, 17 | xlimconst 46572 | . 2 ⊢ (𝜑 → (𝐹 ↾ (ℤ≥‘𝑁))~~>*𝐴) |
| 19 | 5, 9 | fuzxrpmcn 46575 | . . 3 ⊢ (𝜑 → 𝐹 ∈ (ℝ* ↑pm ℂ)) |
| 20 | 19, 7 | xlimres 46568 | . 2 ⊢ (𝜑 → (𝐹~~>*𝐴 ↔ (𝐹 ↾ (ℤ≥‘𝑁))~~>*𝐴)) |
| 21 | 18, 20 | mpbird 260 | 1 ⊢ (𝜑 → 𝐹~~>*𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 Ⅎwnf 1816 ∈ wcel 2146 Ⅎwnfc 2912 class class class wbr 5111 ↾ cres 5665 ⟶wf 6536 ‘cfv 6540 ℝ*cxr 11253 ℤ≥cuz 12873 ~~>*clsxlim 46565 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7738 ax-cnex 11167 ax-resscn 11168 ax-pre-lttri 11185 ax-pre-lttrn 11186 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-int 4915 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7865 df-1st 7988 df-2nd 7989 df-1o 8455 df-2o 8456 df-er 8696 df-pm 8829 df-en 8946 df-dom 8947 df-sdom 8948 df-fin 8949 df-fi 9374 df-pnf 11256 df-mnf 11257 df-xr 11258 df-ltxr 11259 df-le 11260 df-neg 11455 df-z 12603 df-uz 12874 df-topgen 17513 df-ordt 17572 df-ps 18639 df-tsr 18640 df-top 23080 df-topon 23097 df-bases 23132 df-lm 23415 df-xlim 46566 |
| This theorem is used by: climxlim2lem 46592 |
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