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| Mirrors > Home > MPE Home > Th. List > Mathboxes > xlimresdm | Structured version Visualization version GIF version | ||
| Description: A function converges in the extended reals iff its restriction to an upper integers set converges. (Contributed by Glauco Siliprandi, 23-Apr-2023.) |
| Ref | Expression |
|---|---|
| xlimresdm.1 | ⊢ (𝜑 → 𝐹 ∈ (ℝ* ↑pm ℂ)) |
| xlimresdm.2 | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
| Ref | Expression |
|---|---|
| xlimresdm | ⊢ (𝜑 → (𝐹 ∈ dom ~~>* ↔ (𝐹 ↾ (ℤ≥‘𝑀)) ∈ dom ~~>*)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xlimrel 46178 | . . 3 ⊢ Rel ~~>* | |
| 2 | xlimdm 46215 | . . . . . 6 ⊢ (𝐹 ∈ dom ~~>* ↔ 𝐹~~>*(~~>*‘𝐹)) | |
| 3 | 2 | a1i 11 | . . . . 5 ⊢ (𝜑 → (𝐹 ∈ dom ~~>* ↔ 𝐹~~>*(~~>*‘𝐹))) |
| 4 | 3 | biimpa 476 | . . . 4 ⊢ ((𝜑 ∧ 𝐹 ∈ dom ~~>*) → 𝐹~~>*(~~>*‘𝐹)) |
| 5 | xlimresdm.1 | . . . . . 6 ⊢ (𝜑 → 𝐹 ∈ (ℝ* ↑pm ℂ)) | |
| 6 | 5 | adantr 480 | . . . . 5 ⊢ ((𝜑 ∧ 𝐹 ∈ dom ~~>*) → 𝐹 ∈ (ℝ* ↑pm ℂ)) |
| 7 | xlimresdm.2 | . . . . . 6 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
| 8 | 7 | adantr 480 | . . . . 5 ⊢ ((𝜑 ∧ 𝐹 ∈ dom ~~>*) → 𝑀 ∈ ℤ) |
| 9 | 6, 8 | xlimres 46179 | . . . 4 ⊢ ((𝜑 ∧ 𝐹 ∈ dom ~~>*) → (𝐹~~>*(~~>*‘𝐹) ↔ (𝐹 ↾ (ℤ≥‘𝑀))~~>*(~~>*‘𝐹))) |
| 10 | 4, 9 | mpbid 232 | . . 3 ⊢ ((𝜑 ∧ 𝐹 ∈ dom ~~>*) → (𝐹 ↾ (ℤ≥‘𝑀))~~>*(~~>*‘𝐹)) |
| 11 | releldm 5901 | . . 3 ⊢ ((Rel ~~>* ∧ (𝐹 ↾ (ℤ≥‘𝑀))~~>*(~~>*‘𝐹)) → (𝐹 ↾ (ℤ≥‘𝑀)) ∈ dom ~~>*) | |
| 12 | 1, 10, 11 | sylancr 588 | . 2 ⊢ ((𝜑 ∧ 𝐹 ∈ dom ~~>*) → (𝐹 ↾ (ℤ≥‘𝑀)) ∈ dom ~~>*) |
| 13 | xlimdm 46215 | . . . . . 6 ⊢ ((𝐹 ↾ (ℤ≥‘𝑀)) ∈ dom ~~>* ↔ (𝐹 ↾ (ℤ≥‘𝑀))~~>*(~~>*‘(𝐹 ↾ (ℤ≥‘𝑀)))) | |
| 14 | 13 | biimpi 216 | . . . . 5 ⊢ ((𝐹 ↾ (ℤ≥‘𝑀)) ∈ dom ~~>* → (𝐹 ↾ (ℤ≥‘𝑀))~~>*(~~>*‘(𝐹 ↾ (ℤ≥‘𝑀)))) |
| 15 | 14 | adantl 481 | . . . 4 ⊢ ((𝜑 ∧ (𝐹 ↾ (ℤ≥‘𝑀)) ∈ dom ~~>*) → (𝐹 ↾ (ℤ≥‘𝑀))~~>*(~~>*‘(𝐹 ↾ (ℤ≥‘𝑀)))) |
| 16 | 5, 7 | xlimres 46179 | . . . . 5 ⊢ (𝜑 → (𝐹~~>*(~~>*‘(𝐹 ↾ (ℤ≥‘𝑀))) ↔ (𝐹 ↾ (ℤ≥‘𝑀))~~>*(~~>*‘(𝐹 ↾ (ℤ≥‘𝑀))))) |
| 17 | 16 | adantr 480 | . . . 4 ⊢ ((𝜑 ∧ (𝐹 ↾ (ℤ≥‘𝑀)) ∈ dom ~~>*) → (𝐹~~>*(~~>*‘(𝐹 ↾ (ℤ≥‘𝑀))) ↔ (𝐹 ↾ (ℤ≥‘𝑀))~~>*(~~>*‘(𝐹 ↾ (ℤ≥‘𝑀))))) |
| 18 | 15, 17 | mpbird 257 | . . 3 ⊢ ((𝜑 ∧ (𝐹 ↾ (ℤ≥‘𝑀)) ∈ dom ~~>*) → 𝐹~~>*(~~>*‘(𝐹 ↾ (ℤ≥‘𝑀)))) |
| 19 | releldm 5901 | . . 3 ⊢ ((Rel ~~>* ∧ 𝐹~~>*(~~>*‘(𝐹 ↾ (ℤ≥‘𝑀)))) → 𝐹 ∈ dom ~~>*) | |
| 20 | 1, 18, 19 | sylancr 588 | . 2 ⊢ ((𝜑 ∧ (𝐹 ↾ (ℤ≥‘𝑀)) ∈ dom ~~>*) → 𝐹 ∈ dom ~~>*) |
| 21 | 12, 20 | impbida 801 | 1 ⊢ (𝜑 → (𝐹 ∈ dom ~~>* ↔ (𝐹 ↾ (ℤ≥‘𝑀)) ∈ dom ~~>*)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∈ wcel 2114 class class class wbr 5100 dom cdm 5632 ↾ cres 5634 Rel wrel 5637 ‘cfv 6500 (class class class)co 7368 ↑pm cpm 8776 ℂcc 11036 ℝ*cxr 11177 ℤcz 12500 ℤ≥cuz 12763 ~~>*clsxlim 46176 |
| 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 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 |
| 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 3063 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-int 4905 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-om 7819 df-1st 7943 df-2nd 7944 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-1o 8407 df-2o 8408 df-er 8645 df-pm 8778 df-en 8896 df-dom 8897 df-sdom 8898 df-fin 8899 df-fi 9326 df-pnf 11180 df-mnf 11181 df-xr 11182 df-ltxr 11183 df-le 11184 df-sub 11378 df-neg 11379 df-nn 12158 df-z 12501 df-uz 12764 df-topgen 17375 df-ordt 17434 df-ps 18501 df-tsr 18502 df-top 22850 df-topon 22867 df-bases 22902 df-lm 23185 df-haus 23271 df-xlim 46177 |
| This theorem is referenced by: xlimliminflimsup 46220 |
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