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Mirrors > Home > MPE Home > Th. List > fsequb | Structured version Visualization version GIF version |
Description: The values of a finite real sequence have an upper bound. (Contributed by NM, 19-Sep-2005.) (Proof shortened by Mario Carneiro, 28-Apr-2015.) |
Ref | Expression |
---|---|
fsequb | ⊢ (∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ∈ ℝ → ∃𝑥 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) < 𝑥) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fzfi 13574 | . . 3 ⊢ (𝑀...𝑁) ∈ Fin | |
2 | fimaxre3 11805 | . . 3 ⊢ (((𝑀...𝑁) ∈ Fin ∧ ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ∈ ℝ) → ∃𝑦 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ≤ 𝑦) | |
3 | 1, 2 | mpan 690 | . 2 ⊢ (∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ∈ ℝ → ∃𝑦 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ≤ 𝑦) |
4 | r19.26 3094 | . . . . . 6 ⊢ (∀𝑘 ∈ (𝑀...𝑁)((𝐹‘𝑘) ∈ ℝ ∧ (𝐹‘𝑘) ≤ 𝑦) ↔ (∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ∈ ℝ ∧ ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ≤ 𝑦)) | |
5 | peano2re 11032 | . . . . . . 7 ⊢ (𝑦 ∈ ℝ → (𝑦 + 1) ∈ ℝ) | |
6 | ltp1 11699 | . . . . . . . . . . 11 ⊢ (𝑦 ∈ ℝ → 𝑦 < (𝑦 + 1)) | |
7 | 6 | adantr 484 | . . . . . . . . . 10 ⊢ ((𝑦 ∈ ℝ ∧ (𝐹‘𝑘) ∈ ℝ) → 𝑦 < (𝑦 + 1)) |
8 | simpr 488 | . . . . . . . . . . 11 ⊢ ((𝑦 ∈ ℝ ∧ (𝐹‘𝑘) ∈ ℝ) → (𝐹‘𝑘) ∈ ℝ) | |
9 | simpl 486 | . . . . . . . . . . 11 ⊢ ((𝑦 ∈ ℝ ∧ (𝐹‘𝑘) ∈ ℝ) → 𝑦 ∈ ℝ) | |
10 | 5 | adantr 484 | . . . . . . . . . . 11 ⊢ ((𝑦 ∈ ℝ ∧ (𝐹‘𝑘) ∈ ℝ) → (𝑦 + 1) ∈ ℝ) |
11 | lelttr 10950 | . . . . . . . . . . 11 ⊢ (((𝐹‘𝑘) ∈ ℝ ∧ 𝑦 ∈ ℝ ∧ (𝑦 + 1) ∈ ℝ) → (((𝐹‘𝑘) ≤ 𝑦 ∧ 𝑦 < (𝑦 + 1)) → (𝐹‘𝑘) < (𝑦 + 1))) | |
12 | 8, 9, 10, 11 | syl3anc 1373 | . . . . . . . . . 10 ⊢ ((𝑦 ∈ ℝ ∧ (𝐹‘𝑘) ∈ ℝ) → (((𝐹‘𝑘) ≤ 𝑦 ∧ 𝑦 < (𝑦 + 1)) → (𝐹‘𝑘) < (𝑦 + 1))) |
13 | 7, 12 | mpan2d 694 | . . . . . . . . 9 ⊢ ((𝑦 ∈ ℝ ∧ (𝐹‘𝑘) ∈ ℝ) → ((𝐹‘𝑘) ≤ 𝑦 → (𝐹‘𝑘) < (𝑦 + 1))) |
14 | 13 | expimpd 457 | . . . . . . . 8 ⊢ (𝑦 ∈ ℝ → (((𝐹‘𝑘) ∈ ℝ ∧ (𝐹‘𝑘) ≤ 𝑦) → (𝐹‘𝑘) < (𝑦 + 1))) |
15 | 14 | ralimdv 3103 | . . . . . . 7 ⊢ (𝑦 ∈ ℝ → (∀𝑘 ∈ (𝑀...𝑁)((𝐹‘𝑘) ∈ ℝ ∧ (𝐹‘𝑘) ≤ 𝑦) → ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) < (𝑦 + 1))) |
16 | brralrspcev 5129 | . . . . . . 7 ⊢ (((𝑦 + 1) ∈ ℝ ∧ ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) < (𝑦 + 1)) → ∃𝑥 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) < 𝑥) | |
17 | 5, 15, 16 | syl6an 684 | . . . . . 6 ⊢ (𝑦 ∈ ℝ → (∀𝑘 ∈ (𝑀...𝑁)((𝐹‘𝑘) ∈ ℝ ∧ (𝐹‘𝑘) ≤ 𝑦) → ∃𝑥 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) < 𝑥)) |
18 | 4, 17 | syl5bir 246 | . . . . 5 ⊢ (𝑦 ∈ ℝ → ((∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ∈ ℝ ∧ ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ≤ 𝑦) → ∃𝑥 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) < 𝑥)) |
19 | 18 | expd 419 | . . . 4 ⊢ (𝑦 ∈ ℝ → (∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ∈ ℝ → (∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ≤ 𝑦 → ∃𝑥 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) < 𝑥))) |
20 | 19 | impcom 411 | . . 3 ⊢ ((∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ∈ ℝ ∧ 𝑦 ∈ ℝ) → (∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ≤ 𝑦 → ∃𝑥 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) < 𝑥)) |
21 | 20 | rexlimdva 3212 | . 2 ⊢ (∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ∈ ℝ → (∃𝑦 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ≤ 𝑦 → ∃𝑥 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) < 𝑥)) |
22 | 3, 21 | mpd 15 | 1 ⊢ (∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) ∈ ℝ → ∃𝑥 ∈ ℝ ∀𝑘 ∈ (𝑀...𝑁)(𝐹‘𝑘) < 𝑥) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 ∈ wcel 2112 ∀wral 3063 ∃wrex 3064 class class class wbr 5069 ‘cfv 6400 (class class class)co 7234 Fincfn 8649 ℝcr 10755 1c1 10757 + caddc 10759 < clt 10894 ≤ cle 10895 ...cfz 13122 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2710 ax-sep 5208 ax-nul 5215 ax-pow 5274 ax-pr 5338 ax-un 7544 ax-cnex 10812 ax-resscn 10813 ax-1cn 10814 ax-icn 10815 ax-addcl 10816 ax-addrcl 10817 ax-mulcl 10818 ax-mulrcl 10819 ax-mulcom 10820 ax-addass 10821 ax-mulass 10822 ax-distr 10823 ax-i2m1 10824 ax-1ne0 10825 ax-1rid 10826 ax-rnegex 10827 ax-rrecex 10828 ax-cnre 10829 ax-pre-lttri 10830 ax-pre-lttrn 10831 ax-pre-ltadd 10832 ax-pre-mulgt0 10833 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2818 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3711 df-csb 3828 df-dif 3885 df-un 3887 df-in 3889 df-ss 3899 df-pss 3901 df-nul 4254 df-if 4456 df-pw 4531 df-sn 4558 df-pr 4560 df-tp 4562 df-op 4564 df-uni 4836 df-iun 4922 df-br 5070 df-opab 5132 df-mpt 5152 df-tr 5178 df-id 5471 df-eprel 5477 df-po 5485 df-so 5486 df-fr 5526 df-we 5528 df-xp 5574 df-rel 5575 df-cnv 5576 df-co 5577 df-dm 5578 df-rn 5579 df-res 5580 df-ima 5581 df-pred 6178 df-ord 6236 df-on 6237 df-lim 6238 df-suc 6239 df-iota 6358 df-fun 6402 df-fn 6403 df-f 6404 df-f1 6405 df-fo 6406 df-f1o 6407 df-fv 6408 df-riota 7191 df-ov 7237 df-oprab 7238 df-mpo 7239 df-om 7666 df-1st 7782 df-2nd 7783 df-wrecs 8070 df-recs 8131 df-rdg 8169 df-1o 8225 df-er 8414 df-en 8650 df-dom 8651 df-sdom 8652 df-fin 8653 df-pnf 10896 df-mnf 10897 df-xr 10898 df-ltxr 10899 df-le 10900 df-sub 11091 df-neg 11092 df-nn 11858 df-n0 12118 df-z 12204 df-uz 12466 df-fz 13123 |
This theorem is referenced by: (None) |
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