| 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 23 | . . . . . . . . . 10 ⊢ (𝑘 ∈ ℝ → 𝑘 ∈ ℝ) | |
| 2 | pnfxr 11251 | . . . . . . . . . . 11 ⊢ +∞ ∈ ℝ* | |
| 3 | 2 | a1i 11 | . . . . . . . . . 10 ⊢ (𝑘 ∈ ℝ → +∞ ∈ ℝ*) |
| 4 | icossre 13446 | . . . . . . . . . 10 ⊢ ((𝑘 ∈ ℝ ∧ +∞ ∈ ℝ*) → (𝑘[,)+∞) ⊆ ℝ) | |
| 5 | 1, 3, 4 | syl2anc 595 | . . . . . . . . 9 ⊢ (𝑘 ∈ ℝ → (𝑘[,)+∞) ⊆ ℝ) |
| 6 | resima2 6006 | . . . . . . . . 9 ⊢ ((𝑘[,)+∞) ⊆ ℝ → ((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) = (𝐹 “ (𝑘[,)+∞))) | |
| 7 | 5, 6 | syl 18 | . . . . . . . 8 ⊢ (𝑘 ∈ ℝ → ((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) = (𝐹 “ (𝑘[,)+∞))) |
| 8 | 7 | ineq1d 4174 | . . . . . . 7 ⊢ (𝑘 ∈ ℝ → (((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*) = ((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*)) |
| 9 | 8 | supeq1d 9394 | . . . . . 6 ⊢ (𝑘 ∈ ℝ → sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < ) = sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) |
| 10 | 9 | mpteq2ia 5200 | . . . . 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 5919 | . . 3 ⊢ (𝜑 → ran (𝑘 ∈ ℝ ↦ sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) = ran (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < ))) |
| 13 | 12 | infeq1d 9426 | . 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 6018 | . . 3 ⊢ (𝜑 → (𝐹 ↾ ℝ) ∈ V) |
| 16 | eqid 2765 | . . . 4 ⊢ (𝑘 ∈ ℝ ↦ sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) = (𝑘 ∈ ℝ ↦ sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) | |
| 17 | 16 | limsupval 15515 | . . 3 ⊢ ((𝐹 ↾ ℝ) ∈ V → (lim sup‘(𝐹 ↾ ℝ)) = inf(ran (𝑘 ∈ ℝ ↦ sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )), ℝ*, < )) |
| 18 | 15, 17 | syl 18 | . 2 ⊢ (𝜑 → (lim sup‘(𝐹 ↾ ℝ)) = inf(ran (𝑘 ∈ ℝ ↦ sup((((𝐹 ↾ ℝ) “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )), ℝ*, < )) |
| 19 | eqid 2765 | . . . 4 ⊢ (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) = (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )) | |
| 20 | 19 | limsupval 15515 | . . 3 ⊢ (𝐹 ∈ 𝑉 → (lim sup‘𝐹) = inf(ran (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )), ℝ*, < )) |
| 21 | 14, 20 | syl 18 | . 2 ⊢ (𝜑 → (lim sup‘𝐹) = inf(ran (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ*), ℝ*, < )), ℝ*, < )) |
| 22 | 13, 18, 21 | 3eqtr4d 2810 | 1 ⊢ (𝜑 → (lim sup‘(𝐹 ↾ ℝ)) = (lim sup‘𝐹)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1563 ∈ wcel 2145 Vcvv 3457 ∩ cin 3906 ⊆ wss 3907 ↦ cmpt 5186 ran crn 5653 ↾ cres 5654 “ cima 5655 ‘cfv 6525 (class class class)co 7400 supcsup 9388 infcinf 9389 ℝcr 11087 +∞cpnf 11228 ℝ*cxr 11230 < clt 11231 [,)cico 13365 lim supclsp 15511 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-sep 5251 ax-nul 5261 ax-pow 5327 ax-pr 5395 ax-un 7722 ax-cnex 11144 ax-resscn 11145 ax-pre-lttri 11162 ax-pre-lttrn 11163 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3370 df-rab 3418 df-v 3459 df-sbc 3748 df-csb 3856 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4869 df-br 5106 df-opab 5168 df-mpt 5187 df-id 5547 df-po 5560 df-so 5561 df-xp 5658 df-rel 5659 df-cnv 5660 df-co 5661 df-dm 5662 df-rn 5663 df-res 5664 df-ima 5665 df-iota 6481 df-fun 6527 df-fn 6528 df-f 6529 df-f1 6530 df-fo 6531 df-f1o 6532 df-fv 6533 df-ov 7403 df-oprab 7404 df-mpo 7405 df-er 8682 df-en 8932 df-dom 8933 df-sdom 8934 df-sup 9390 df-inf 9391 df-pnf 11233 df-mnf 11234 df-xr 11235 df-ltxr 11236 df-le 11237 df-ico 13369 df-limsup 15512 |
| This theorem is referenced by: limsupresuz 46275 |
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