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| Mirrors > Home > MPE Home > Th. List > Mathboxes > limsupresuz | Structured version Visualization version GIF version | ||
| Description: If the real part of the domain of a function is a subset of the integers, the superior limit doesn't change when the function is restricted to an upper set of integers. (Contributed by Glauco Siliprandi, 23-Oct-2021.) |
| Ref | Expression |
|---|---|
| limsupresuz.m | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
| limsupresuz.z | ⊢ 𝑍 = (ℤ≥‘𝑀) |
| limsupresuz.f | ⊢ (𝜑 → 𝐹 ∈ 𝑉) |
| limsupresuz.d | ⊢ (𝜑 → dom (𝐹 ↾ ℝ) ⊆ ℤ) |
| Ref | Expression |
|---|---|
| limsupresuz | ⊢ (𝜑 → (lim sup‘(𝐹 ↾ 𝑍)) = (lim sup‘𝐹)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rescom 5995 | . . . . 5 ⊢ ((𝐹 ↾ 𝑍) ↾ ℝ) = ((𝐹 ↾ ℝ) ↾ 𝑍) | |
| 2 | 1 | fveq2i 6881 | . . . 4 ⊢ (lim sup‘((𝐹 ↾ 𝑍) ↾ ℝ)) = (lim sup‘((𝐹 ↾ ℝ) ↾ 𝑍)) |
| 3 | 2 | a1i 11 | . . 3 ⊢ (𝜑 → (lim sup‘((𝐹 ↾ 𝑍) ↾ ℝ)) = (lim sup‘((𝐹 ↾ ℝ) ↾ 𝑍))) |
| 4 | relres 5998 | . . . . . . . . . 10 ⊢ Rel (𝐹 ↾ ℝ) | |
| 5 | 4 | a1i 11 | . . . . . . . . 9 ⊢ (𝜑 → Rel (𝐹 ↾ ℝ)) |
| 6 | limsupresuz.d | . . . . . . . . 9 ⊢ (𝜑 → dom (𝐹 ↾ ℝ) ⊆ ℤ) | |
| 7 | relssres 6015 | . . . . . . . . 9 ⊢ ((Rel (𝐹 ↾ ℝ) ∧ dom (𝐹 ↾ ℝ) ⊆ ℤ) → ((𝐹 ↾ ℝ) ↾ ℤ) = (𝐹 ↾ ℝ)) | |
| 8 | 5, 6, 7 | syl2anc 596 | . . . . . . . 8 ⊢ (𝜑 → ((𝐹 ↾ ℝ) ↾ ℤ) = (𝐹 ↾ ℝ)) |
| 9 | 8 | eqcomd 2766 | . . . . . . 7 ⊢ (𝜑 → (𝐹 ↾ ℝ) = ((𝐹 ↾ ℝ) ↾ ℤ)) |
| 10 | 9 | reseq1d 5971 | . . . . . 6 ⊢ (𝜑 → ((𝐹 ↾ ℝ) ↾ (𝑀[,)+∞)) = (((𝐹 ↾ ℝ) ↾ ℤ) ↾ (𝑀[,)+∞))) |
| 11 | resres 5985 | . . . . . . 7 ⊢ (((𝐹 ↾ ℝ) ↾ ℤ) ↾ (𝑀[,)+∞)) = ((𝐹 ↾ ℝ) ↾ (ℤ ∩ (𝑀[,)+∞))) | |
| 12 | 11 | a1i 11 | . . . . . 6 ⊢ (𝜑 → (((𝐹 ↾ ℝ) ↾ ℤ) ↾ (𝑀[,)+∞)) = ((𝐹 ↾ ℝ) ↾ (ℤ ∩ (𝑀[,)+∞)))) |
| 13 | limsupresuz.m | . . . . . . . . 9 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
| 14 | limsupresuz.z | . . . . . . . . 9 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
| 15 | 13, 14 | uzinico 46389 | . . . . . . . 8 ⊢ (𝜑 → 𝑍 = (ℤ ∩ (𝑀[,)+∞))) |
| 16 | 15 | eqcomd 2766 | . . . . . . 7 ⊢ (𝜑 → (ℤ ∩ (𝑀[,)+∞)) = 𝑍) |
| 17 | 16 | reseq2d 5972 | . . . . . 6 ⊢ (𝜑 → ((𝐹 ↾ ℝ) ↾ (ℤ ∩ (𝑀[,)+∞))) = ((𝐹 ↾ ℝ) ↾ 𝑍)) |
| 18 | 10, 12, 17 | 3eqtrrd 2800 | . . . . 5 ⊢ (𝜑 → ((𝐹 ↾ ℝ) ↾ 𝑍) = ((𝐹 ↾ ℝ) ↾ (𝑀[,)+∞))) |
| 19 | 18 | fveq2d 6882 | . . . 4 ⊢ (𝜑 → (lim sup‘((𝐹 ↾ ℝ) ↾ 𝑍)) = (lim sup‘((𝐹 ↾ ℝ) ↾ (𝑀[,)+∞)))) |
| 20 | 13 | zred 12725 | . . . . 5 ⊢ (𝜑 → 𝑀 ∈ ℝ) |
| 21 | eqid 2760 | . . . . 5 ⊢ (𝑀[,)+∞) = (𝑀[,)+∞) | |
| 22 | limsupresuz.f | . . . . . 6 ⊢ (𝜑 → 𝐹 ∈ 𝑉) | |
| 23 | 22 | resexd 6021 | . . . . 5 ⊢ (𝜑 → (𝐹 ↾ ℝ) ∈ V) |
| 24 | 20, 21, 23 | limsupresico 46528 | . . . 4 ⊢ (𝜑 → (lim sup‘((𝐹 ↾ ℝ) ↾ (𝑀[,)+∞))) = (lim sup‘(𝐹 ↾ ℝ))) |
| 25 | 19, 24 | eqtrd 2795 | . . 3 ⊢ (𝜑 → (lim sup‘((𝐹 ↾ ℝ) ↾ 𝑍)) = (lim sup‘(𝐹 ↾ ℝ))) |
| 26 | 3, 25 | eqtrd 2795 | . 2 ⊢ (𝜑 → (lim sup‘((𝐹 ↾ 𝑍) ↾ ℝ)) = (lim sup‘(𝐹 ↾ ℝ))) |
| 27 | 22 | resexd 6021 | . . 3 ⊢ (𝜑 → (𝐹 ↾ 𝑍) ∈ V) |
| 28 | 27 | limsupresre 46524 | . 2 ⊢ (𝜑 → (lim sup‘((𝐹 ↾ 𝑍) ↾ ℝ)) = (lim sup‘(𝐹 ↾ 𝑍))) |
| 29 | 22 | limsupresre 46524 | . 2 ⊢ (𝜑 → (lim sup‘(𝐹 ↾ ℝ)) = (lim sup‘𝐹)) |
| 30 | 26, 28, 29 | 3eqtr3d 2803 | 1 ⊢ (𝜑 → (lim sup‘(𝐹 ↾ 𝑍)) = (lim sup‘𝐹)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 Vcvv 3450 ∩ cin 3898 ⊆ wss 3899 dom cdm 5655 ↾ cres 5657 Rel wrel 5660 ‘cfv 6533 (class class class)co 7413 ℝcr 11123 +∞cpnf 11264 ℤcz 12615 ℤ≥cuz 12887 [,)cico 13400 lim supclsp 15557 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7736 ax-cnex 11180 ax-resscn 11181 ax-1cn 11182 ax-icn 11183 ax-addcl 11184 ax-addrcl 11185 ax-mulcl 11186 ax-mulrcl 11187 ax-mulcom 11188 ax-addass 11189 ax-mulass 11190 ax-distr 11191 ax-i2m1 11192 ax-1ne0 11193 ax-1rid 11194 ax-rnegex 11195 ax-rrecex 11196 ax-cnre 11197 ax-pre-lttri 11198 ax-pre-lttrn 11199 ax-pre-ltadd 11200 ax-pre-mulgt0 11201 ax-pre-sup 11202 |
| 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 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7370 df-ov 7416 df-oprab 7417 df-mpo 7418 df-om 7863 df-1st 7986 df-2nd 7987 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-er 8696 df-en 8953 df-dom 8954 df-sdom 8955 df-sup 9412 df-inf 9413 df-pnf 11269 df-mnf 11270 df-xr 11271 df-ltxr 11272 df-le 11273 df-sub 11467 df-neg 11468 df-div 11896 df-nn 12258 df-n0 12529 df-z 12616 df-uz 12888 df-q 12998 df-ico 13404 df-limsup 15558 |
| This theorem is used by: limsupresuz2 46537 |
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