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Mirrors > Home > MPE Home > Th. List > uzsup | Structured version Visualization version GIF version |
Description: An upper set of integers is unbounded above. (Contributed by Mario Carneiro, 7-May-2016.) |
Ref | Expression |
---|---|
uzsup.1 | ⊢ 𝑍 = (ℤ≥‘𝑀) |
Ref | Expression |
---|---|
uzsup | ⊢ (𝑀 ∈ ℤ → sup(𝑍, ℝ*, < ) = +∞) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpl 474 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → 𝑀 ∈ ℤ) | |
2 | flcl 12711 | . . . . . . . 8 ⊢ (𝑥 ∈ ℝ → (⌊‘𝑥) ∈ ℤ) | |
3 | 2 | peano2zd 11598 | . . . . . . 7 ⊢ (𝑥 ∈ ℝ → ((⌊‘𝑥) + 1) ∈ ℤ) |
4 | id 22 | . . . . . . 7 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℤ) | |
5 | ifcl 4238 | . . . . . . 7 ⊢ ((((⌊‘𝑥) + 1) ∈ ℤ ∧ 𝑀 ∈ ℤ) → if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) ∈ ℤ) | |
6 | 3, 4, 5 | syl2anr 496 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) ∈ ℤ) |
7 | zre 11494 | . . . . . . 7 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℝ) | |
8 | reflcl 12712 | . . . . . . . 8 ⊢ (𝑥 ∈ ℝ → (⌊‘𝑥) ∈ ℝ) | |
9 | peano2re 10322 | . . . . . . . 8 ⊢ ((⌊‘𝑥) ∈ ℝ → ((⌊‘𝑥) + 1) ∈ ℝ) | |
10 | 8, 9 | syl 17 | . . . . . . 7 ⊢ (𝑥 ∈ ℝ → ((⌊‘𝑥) + 1) ∈ ℝ) |
11 | max1 12130 | . . . . . . 7 ⊢ ((𝑀 ∈ ℝ ∧ ((⌊‘𝑥) + 1) ∈ ℝ) → 𝑀 ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀)) | |
12 | 7, 10, 11 | syl2an 495 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → 𝑀 ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀)) |
13 | eluz2 11806 | . . . . . 6 ⊢ (if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) ∈ (ℤ≥‘𝑀) ↔ (𝑀 ∈ ℤ ∧ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) ∈ ℤ ∧ 𝑀 ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀))) | |
14 | 1, 6, 12, 13 | syl3anbrc 1383 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) ∈ (ℤ≥‘𝑀)) |
15 | uzsup.1 | . . . . 5 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
16 | 14, 15 | syl6eleqr 2814 | . . . 4 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) ∈ 𝑍) |
17 | simpr 479 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → 𝑥 ∈ ℝ) | |
18 | 10 | adantl 473 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → ((⌊‘𝑥) + 1) ∈ ℝ) |
19 | 6 | zred 11595 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) ∈ ℝ) |
20 | fllep1 12717 | . . . . . 6 ⊢ (𝑥 ∈ ℝ → 𝑥 ≤ ((⌊‘𝑥) + 1)) | |
21 | 20 | adantl 473 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → 𝑥 ≤ ((⌊‘𝑥) + 1)) |
22 | max2 12132 | . . . . . 6 ⊢ ((𝑀 ∈ ℝ ∧ ((⌊‘𝑥) + 1) ∈ ℝ) → ((⌊‘𝑥) + 1) ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀)) | |
23 | 7, 10, 22 | syl2an 495 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → ((⌊‘𝑥) + 1) ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀)) |
24 | 17, 18, 19, 21, 23 | letrd 10307 | . . . 4 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → 𝑥 ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀)) |
25 | breq2 4764 | . . . . 5 ⊢ (𝑛 = if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) → (𝑥 ≤ 𝑛 ↔ 𝑥 ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀))) | |
26 | 25 | rspcev 3413 | . . . 4 ⊢ ((if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) ∈ 𝑍 ∧ 𝑥 ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀)) → ∃𝑛 ∈ 𝑍 𝑥 ≤ 𝑛) |
27 | 16, 24, 26 | syl2anc 696 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → ∃𝑛 ∈ 𝑍 𝑥 ≤ 𝑛) |
28 | 27 | ralrimiva 3068 | . 2 ⊢ (𝑀 ∈ ℤ → ∀𝑥 ∈ ℝ ∃𝑛 ∈ 𝑍 𝑥 ≤ 𝑛) |
29 | uzssz 11820 | . . . . . 6 ⊢ (ℤ≥‘𝑀) ⊆ ℤ | |
30 | 15, 29 | eqsstri 3741 | . . . . 5 ⊢ 𝑍 ⊆ ℤ |
31 | zssre 11497 | . . . . 5 ⊢ ℤ ⊆ ℝ | |
32 | 30, 31 | sstri 3718 | . . . 4 ⊢ 𝑍 ⊆ ℝ |
33 | ressxr 10196 | . . . 4 ⊢ ℝ ⊆ ℝ* | |
34 | 32, 33 | sstri 3718 | . . 3 ⊢ 𝑍 ⊆ ℝ* |
35 | supxrunb1 12263 | . . 3 ⊢ (𝑍 ⊆ ℝ* → (∀𝑥 ∈ ℝ ∃𝑛 ∈ 𝑍 𝑥 ≤ 𝑛 ↔ sup(𝑍, ℝ*, < ) = +∞)) | |
36 | 34, 35 | ax-mp 5 | . 2 ⊢ (∀𝑥 ∈ ℝ ∃𝑛 ∈ 𝑍 𝑥 ≤ 𝑛 ↔ sup(𝑍, ℝ*, < ) = +∞) |
37 | 28, 36 | sylib 208 | 1 ⊢ (𝑀 ∈ ℤ → sup(𝑍, ℝ*, < ) = +∞) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 196 ∧ wa 383 = wceq 1596 ∈ wcel 2103 ∀wral 3014 ∃wrex 3015 ⊆ wss 3680 ifcif 4194 class class class wbr 4760 ‘cfv 6001 (class class class)co 6765 supcsup 8462 ℝcr 10048 1c1 10050 + caddc 10052 +∞cpnf 10184 ℝ*cxr 10186 < clt 10187 ≤ cle 10188 ℤcz 11490 ℤ≥cuz 11800 ⌊cfl 12706 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1835 ax-4 1850 ax-5 1952 ax-6 2018 ax-7 2054 ax-8 2105 ax-9 2112 ax-10 2132 ax-11 2147 ax-12 2160 ax-13 2355 ax-ext 2704 ax-sep 4889 ax-nul 4897 ax-pow 4948 ax-pr 5011 ax-un 7066 ax-cnex 10105 ax-resscn 10106 ax-1cn 10107 ax-icn 10108 ax-addcl 10109 ax-addrcl 10110 ax-mulcl 10111 ax-mulrcl 10112 ax-mulcom 10113 ax-addass 10114 ax-mulass 10115 ax-distr 10116 ax-i2m1 10117 ax-1ne0 10118 ax-1rid 10119 ax-rnegex 10120 ax-rrecex 10121 ax-cnre 10122 ax-pre-lttri 10123 ax-pre-lttrn 10124 ax-pre-ltadd 10125 ax-pre-mulgt0 10126 ax-pre-sup 10127 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3or 1073 df-3an 1074 df-tru 1599 df-ex 1818 df-nf 1823 df-sb 2011 df-eu 2575 df-mo 2576 df-clab 2711 df-cleq 2717 df-clel 2720 df-nfc 2855 df-ne 2897 df-nel 3000 df-ral 3019 df-rex 3020 df-reu 3021 df-rmo 3022 df-rab 3023 df-v 3306 df-sbc 3542 df-csb 3640 df-dif 3683 df-un 3685 df-in 3687 df-ss 3694 df-pss 3696 df-nul 4024 df-if 4195 df-pw 4268 df-sn 4286 df-pr 4288 df-tp 4290 df-op 4292 df-uni 4545 df-iun 4630 df-br 4761 df-opab 4821 df-mpt 4838 df-tr 4861 df-id 5128 df-eprel 5133 df-po 5139 df-so 5140 df-fr 5177 df-we 5179 df-xp 5224 df-rel 5225 df-cnv 5226 df-co 5227 df-dm 5228 df-rn 5229 df-res 5230 df-ima 5231 df-pred 5793 df-ord 5839 df-on 5840 df-lim 5841 df-suc 5842 df-iota 5964 df-fun 6003 df-fn 6004 df-f 6005 df-f1 6006 df-fo 6007 df-f1o 6008 df-fv 6009 df-riota 6726 df-ov 6768 df-oprab 6769 df-mpt2 6770 df-om 7183 df-wrecs 7527 df-recs 7588 df-rdg 7626 df-er 7862 df-en 8073 df-dom 8074 df-sdom 8075 df-sup 8464 df-inf 8465 df-pnf 10189 df-mnf 10190 df-xr 10191 df-ltxr 10192 df-le 10193 df-sub 10381 df-neg 10382 df-nn 11134 df-n0 11406 df-z 11491 df-uz 11801 df-fl 12708 |
This theorem is referenced by: climrecl 14434 climge0 14435 caurcvg 14527 caucvg 14529 mbflimsup 23553 limsupvaluz 40360 ioodvbdlimc1lem2 40567 ioodvbdlimc2lem 40569 |
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