Mathbox for Glauco Siliprandi |
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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 5881 | . . . . 5 ⊢ ((𝐹 ↾ 𝑍) ↾ ℝ) = ((𝐹 ↾ ℝ) ↾ 𝑍) | |
2 | 1 | fveq2i 6675 | . . . 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 5884 | . . . . . . . . . 10 ⊢ Rel (𝐹 ↾ ℝ) | |
5 | 4 | a1i 11 | . . . . . . . . 9 ⊢ (𝜑 → Rel (𝐹 ↾ ℝ)) |
6 | limsupresuz.d | . . . . . . . . 9 ⊢ (𝜑 → dom (𝐹 ↾ ℝ) ⊆ ℤ) | |
7 | relssres 5895 | . . . . . . . . 9 ⊢ ((Rel (𝐹 ↾ ℝ) ∧ dom (𝐹 ↾ ℝ) ⊆ ℤ) → ((𝐹 ↾ ℝ) ↾ ℤ) = (𝐹 ↾ ℝ)) | |
8 | 5, 6, 7 | syl2anc 586 | . . . . . . . 8 ⊢ (𝜑 → ((𝐹 ↾ ℝ) ↾ ℤ) = (𝐹 ↾ ℝ)) |
9 | 8 | eqcomd 2829 | . . . . . . 7 ⊢ (𝜑 → (𝐹 ↾ ℝ) = ((𝐹 ↾ ℝ) ↾ ℤ)) |
10 | 9 | reseq1d 5854 | . . . . . 6 ⊢ (𝜑 → ((𝐹 ↾ ℝ) ↾ (𝑀[,)+∞)) = (((𝐹 ↾ ℝ) ↾ ℤ) ↾ (𝑀[,)+∞))) |
11 | resres 5868 | . . . . . . 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 41843 | . . . . . . . 8 ⊢ (𝜑 → 𝑍 = (ℤ ∩ (𝑀[,)+∞))) |
16 | 15 | eqcomd 2829 | . . . . . . 7 ⊢ (𝜑 → (ℤ ∩ (𝑀[,)+∞)) = 𝑍) |
17 | 16 | reseq2d 5855 | . . . . . 6 ⊢ (𝜑 → ((𝐹 ↾ ℝ) ↾ (ℤ ∩ (𝑀[,)+∞))) = ((𝐹 ↾ ℝ) ↾ 𝑍)) |
18 | 10, 12, 17 | 3eqtrrd 2863 | . . . . 5 ⊢ (𝜑 → ((𝐹 ↾ ℝ) ↾ 𝑍) = ((𝐹 ↾ ℝ) ↾ (𝑀[,)+∞))) |
19 | 18 | fveq2d 6676 | . . . 4 ⊢ (𝜑 → (lim sup‘((𝐹 ↾ ℝ) ↾ 𝑍)) = (lim sup‘((𝐹 ↾ ℝ) ↾ (𝑀[,)+∞)))) |
20 | 13 | zred 12090 | . . . . 5 ⊢ (𝜑 → 𝑀 ∈ ℝ) |
21 | eqid 2823 | . . . . 5 ⊢ (𝑀[,)+∞) = (𝑀[,)+∞) | |
22 | limsupresuz.f | . . . . . 6 ⊢ (𝜑 → 𝐹 ∈ 𝑉) | |
23 | 22 | resexd 41410 | . . . . 5 ⊢ (𝜑 → (𝐹 ↾ ℝ) ∈ V) |
24 | 20, 21, 23 | limsupresico 41988 | . . . 4 ⊢ (𝜑 → (lim sup‘((𝐹 ↾ ℝ) ↾ (𝑀[,)+∞))) = (lim sup‘(𝐹 ↾ ℝ))) |
25 | 19, 24 | eqtrd 2858 | . . 3 ⊢ (𝜑 → (lim sup‘((𝐹 ↾ ℝ) ↾ 𝑍)) = (lim sup‘(𝐹 ↾ ℝ))) |
26 | 3, 25 | eqtrd 2858 | . 2 ⊢ (𝜑 → (lim sup‘((𝐹 ↾ 𝑍) ↾ ℝ)) = (lim sup‘(𝐹 ↾ ℝ))) |
27 | 22 | resexd 41410 | . . 3 ⊢ (𝜑 → (𝐹 ↾ 𝑍) ∈ V) |
28 | 27 | limsupresre 41984 | . 2 ⊢ (𝜑 → (lim sup‘((𝐹 ↾ 𝑍) ↾ ℝ)) = (lim sup‘(𝐹 ↾ 𝑍))) |
29 | 22 | limsupresre 41984 | . 2 ⊢ (𝜑 → (lim sup‘(𝐹 ↾ ℝ)) = (lim sup‘𝐹)) |
30 | 26, 28, 29 | 3eqtr3d 2866 | 1 ⊢ (𝜑 → (lim sup‘(𝐹 ↾ 𝑍)) = (lim sup‘𝐹)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1537 ∈ wcel 2114 Vcvv 3496 ∩ cin 3937 ⊆ wss 3938 dom cdm 5557 ↾ cres 5559 Rel wrel 5562 ‘cfv 6357 (class class class)co 7158 ℝcr 10538 +∞cpnf 10674 ℤcz 11984 ℤ≥cuz 12246 [,)cico 12743 lim supclsp 14829 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-cnex 10595 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 ax-pre-mulgt0 10616 ax-pre-sup 10617 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rmo 3148 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-om 7583 df-1st 7691 df-2nd 7692 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-er 8291 df-en 8512 df-dom 8513 df-sdom 8514 df-sup 8908 df-inf 8909 df-pnf 10679 df-mnf 10680 df-xr 10681 df-ltxr 10682 df-le 10683 df-sub 10874 df-neg 10875 df-div 11300 df-nn 11641 df-n0 11901 df-z 11985 df-uz 12247 df-q 12352 df-ico 12747 df-limsup 14830 |
This theorem is referenced by: limsupresuz2 41997 |
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