| 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 11204 | . . . . . . . . . . 11 ⊢ +∞ ∈ ℝ* | |
| 3 | 2 | a1i 11 | . . . . . . . . . 10 ⊢ (𝑘 ∈ ℝ → +∞ ∈ ℝ*) |
| 4 | icossre 13365 | . . . . . . . . . 10 ⊢ ((𝑘 ∈ ℝ ∧ +∞ ∈ ℝ*) → (𝑘[,)+∞) ⊆ ℝ) | |
| 5 | 1, 3, 4 | syl2anc 584 | . . . . . . . . 9 ⊢ (𝑘 ∈ ℝ → (𝑘[,)+∞) ⊆ ℝ) |
| 6 | resima2 5976 | . . . . . . . . 9 ⊢ ((𝑘[,)+∞) ⊆ ℝ → ((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) = (𝐹 “ (𝑘[,)+∞))) | |
| 7 | 5, 6 | syl 17 | . . . . . . . 8 ⊢ (𝑘 ∈ ℝ → ((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) = (𝐹 “ (𝑘[,)+∞))) |
| 8 | 7 | ineq1d 4178 | . . . . . . 7 ⊢ (𝑘 ∈ ℝ → (((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*) = ((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*)) |
| 9 | 8 | supeq1d 9373 | . . . . . 6 ⊢ (𝑘 ∈ ℝ → sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < ) = sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) |
| 10 | 9 | mpteq2ia 5197 | . . . . 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 5891 | . . 3 ⊢ (𝜑 → ran (𝑘 ∈ ℝ ↦ sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) = ran (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < ))) |
| 13 | 12 | infeq1d 9405 | . 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 5988 | . . 3 ⊢ (𝜑 → (𝐹 ↾ ℝ) ∈ V) |
| 16 | eqid 2729 | . . . 4 ⊢ (𝑘 ∈ ℝ ↦ sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) = (𝑘 ∈ ℝ ↦ sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) | |
| 17 | 16 | limsupval 15416 | . . 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 2729 | . . . 4 ⊢ (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) = (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) | |
| 20 | 19 | limsupval 15416 | . . 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 2774 | 1 ⊢ (𝜑 → (lim sup‘(𝐹 ↾ ℝ)) = (lim sup‘𝐹)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2109 Vcvv 3444 ∩ cin 3910 ⊆ wss 3911 ↦ cmpt 5183 ran crn 5632 ↾ cres 5633 “ cima 5634 ‘cfv 6499 (class class class)co 7369 supcsup 9367 infcinf 9368 ℝcr 11043 +∞cpnf 11181 ℝ*cxr 11183 < clt 11184 [,)cico 13284 lim supclsp 15412 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7691 ax-cnex 11100 ax-resscn 11101 ax-pre-lttri 11118 ax-pre-lttrn 11119 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3351 df-rab 3403 df-v 3446 df-sbc 3751 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-br 5103 df-opab 5165 df-mpt 5184 df-id 5526 df-po 5539 df-so 5540 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6452 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-ov 7372 df-oprab 7373 df-mpo 7374 df-er 8648 df-en 8896 df-dom 8897 df-sdom 8898 df-sup 9369 df-inf 9370 df-pnf 11186 df-mnf 11187 df-xr 11188 df-ltxr 11189 df-le 11190 df-ico 13288 df-limsup 15413 |
| This theorem is referenced by: limsupresuz 45694 |
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