| Mathbox for Glauco Siliprandi |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > limsupresre | Structured version Visualization version GIF version | ||
| Description: The supremum limit of a function only depends on the real part of its domain. (Contributed by Glauco Siliprandi, 23-Oct-2021.) |
| Ref | Expression |
|---|---|
| limsupresre.1 | ⊢ (𝜑 → 𝐹 ∈ 𝑉) |
| Ref | Expression |
|---|---|
| limsupresre | ⊢ (𝜑 → (lim sup‘(𝐹 ↾ ℝ)) = (lim sup‘𝐹)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 22 | . . . . . . . . . 10 ⊢ (𝑘 ∈ ℝ → 𝑘 ∈ ℝ) | |
| 2 | pnfxr 11188 | . . . . . . . . . . 11 ⊢ +∞ ∈ ℝ* | |
| 3 | 2 | a1i 11 | . . . . . . . . . 10 ⊢ (𝑘 ∈ ℝ → +∞ ∈ ℝ*) |
| 4 | icossre 13370 | . . . . . . . . . 10 ⊢ ((𝑘 ∈ ℝ ∧ +∞ ∈ ℝ*) → (𝑘[,)+∞) ⊆ ℝ) | |
| 5 | 1, 3, 4 | syl2anc 585 | . . . . . . . . 9 ⊢ (𝑘 ∈ ℝ → (𝑘[,)+∞) ⊆ ℝ) |
| 6 | resima2 5970 | . . . . . . . . 9 ⊢ ((𝑘[,)+∞) ⊆ ℝ → ((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) = (𝐹 “ (𝑘[,)+∞))) | |
| 7 | 5, 6 | syl 17 | . . . . . . . 8 ⊢ (𝑘 ∈ ℝ → ((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) = (𝐹 “ (𝑘[,)+∞))) |
| 8 | 7 | ineq1d 4150 | . . . . . . 7 ⊢ (𝑘 ∈ ℝ → (((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*) = ((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*)) |
| 9 | 8 | supeq1d 9348 | . . . . . 6 ⊢ (𝑘 ∈ ℝ → sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < ) = sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) |
| 10 | 9 | mpteq2ia 5169 | . . . . 5 ⊢ (𝑘 ∈ ℝ ↦ sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) = (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) |
| 11 | 10 | a1i 11 | . . . 4 ⊢ (𝜑 → (𝑘 ∈ ℝ ↦ sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) = (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < ))) |
| 12 | 11 | rneqd 5882 | . . 3 ⊢ (𝜑 → ran (𝑘 ∈ ℝ ↦ sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) = ran (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < ))) |
| 13 | 12 | infeq1d 9380 | . 2 ⊢ (𝜑 → inf(ran (𝑘 ∈ ℝ ↦ sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )), ℝ*, < ) = inf(ran (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )), ℝ*, < )) |
| 14 | limsupresre.1 | . . . 4 ⊢ (𝜑 → 𝐹 ∈ 𝑉) | |
| 15 | 14 | resexd 5982 | . . 3 ⊢ (𝜑 → (𝐹 ↾ ℝ) ∈ V) |
| 16 | eqid 2735 | . . . 4 ⊢ (𝑘 ∈ ℝ ↦ sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) = (𝑘 ∈ ℝ ↦ sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) | |
| 17 | 16 | limsupval 15425 | . . 3 ⊢ ((𝐹 ↾ ℝ) ∈ V → (lim sup‘(𝐹 ↾ ℝ)) = inf(ran (𝑘 ∈ ℝ ↦ sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )), ℝ*, < )) |
| 18 | 15, 17 | syl 17 | . 2 ⊢ (𝜑 → (lim sup‘(𝐹 ↾ ℝ)) = inf(ran (𝑘 ∈ ℝ ↦ sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )), ℝ*, < )) |
| 19 | eqid 2735 | . . . 4 ⊢ (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) = (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) | |
| 20 | 19 | limsupval 15425 | . . 3 ⊢ (𝐹 ∈ 𝑉 → (lim sup‘𝐹) = inf(ran (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )), ℝ*, < )) |
| 21 | 14, 20 | syl 17 | . 2 ⊢ (𝜑 → (lim sup‘𝐹) = inf(ran (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )), ℝ*, < )) |
| 22 | 13, 18, 21 | 3eqtr4d 2780 | 1 ⊢ (𝜑 → (lim sup‘(𝐹 ↾ ℝ)) = (lim sup‘𝐹)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 Vcvv 3427 ∩ cin 3884 ⊆ wss 3885 ↦ cmpt 5155 ran crn 5621 ↾ cres 5622 “ cima 5623 ‘cfv 6487 (class class class)co 7356 supcsup 9342 infcinf 9343 ℝcr 11026 +∞cpnf 11165 ℝ*cxr 11167 < clt 11168 [,)cico 13289 lim supclsp 15421 |
| 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 2184 ax-ext 2707 ax-sep 5220 ax-nul 5230 ax-pow 5296 ax-pr 5364 ax-un 7678 ax-cnex 11083 ax-resscn 11084 ax-pre-lttri 11101 ax-pre-lttrn 11102 |
| 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 2538 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2810 df-nfc 2884 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3060 df-rmo 3340 df-rab 3388 df-v 3429 df-sbc 3726 df-csb 3834 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-nul 4264 df-if 4457 df-pw 4533 df-sn 4558 df-pr 4560 df-op 4564 df-uni 4841 df-br 5075 df-opab 5137 df-mpt 5156 df-id 5515 df-po 5528 df-so 5529 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-rn 5631 df-res 5632 df-ima 5633 df-iota 6443 df-fun 6489 df-fn 6490 df-f 6491 df-f1 6492 df-fo 6493 df-f1o 6494 df-fv 6495 df-ov 7359 df-oprab 7360 df-mpo 7361 df-er 8632 df-en 8883 df-dom 8884 df-sdom 8885 df-sup 9344 df-inf 9345 df-pnf 11170 df-mnf 11171 df-xr 11172 df-ltxr 11173 df-le 11174 df-ico 13293 df-limsup 15422 |
| This theorem is referenced by: limsupresuz 46119 |
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