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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 482 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → 𝑀 ∈ ℤ) | |
| 2 | flcl 13748 | . . . . . . . 8 ⊢ (𝑥 ∈ ℝ → (⌊‘𝑥) ∈ ℤ) | |
| 3 | 2 | peano2zd 12630 | . . . . . . 7 ⊢ (𝑥 ∈ ℝ → ((⌊‘𝑥) + 1) ∈ ℤ) |
| 4 | id 22 | . . . . . . 7 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℤ) | |
| 5 | ifcl 4513 | . . . . . . 7 ⊢ ((((⌊‘𝑥) + 1) ∈ ℤ ∧ 𝑀 ∈ ℤ) → if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) ∈ ℤ) | |
| 6 | 3, 4, 5 | syl2anr 598 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) ∈ ℤ) |
| 7 | zre 12522 | . . . . . . 7 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℝ) | |
| 8 | reflcl 13749 | . . . . . . . 8 ⊢ (𝑥 ∈ ℝ → (⌊‘𝑥) ∈ ℝ) | |
| 9 | peano2re 11313 | . . . . . . . 8 ⊢ ((⌊‘𝑥) ∈ ℝ → ((⌊‘𝑥) + 1) ∈ ℝ) | |
| 10 | 8, 9 | syl 17 | . . . . . . 7 ⊢ (𝑥 ∈ ℝ → ((⌊‘𝑥) + 1) ∈ ℝ) |
| 11 | max1 13131 | . . . . . . 7 ⊢ ((𝑀 ∈ ℝ ∧ ((⌊‘𝑥) + 1) ∈ ℝ) → 𝑀 ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀)) | |
| 12 | 7, 10, 11 | syl2an 597 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → 𝑀 ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀)) |
| 13 | eluz2 12788 | . . . . . 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 1345 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) ∈ (ℤ≥‘𝑀)) |
| 15 | uzsup.1 | . . . . 5 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
| 16 | 14, 15 | eleqtrrdi 2848 | . . . 4 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) ∈ 𝑍) |
| 17 | simpr 484 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → 𝑥 ∈ ℝ) | |
| 18 | 10 | adantl 481 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → ((⌊‘𝑥) + 1) ∈ ℝ) |
| 19 | 6 | zred 12627 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) ∈ ℝ) |
| 20 | fllep1 13754 | . . . . . 6 ⊢ (𝑥 ∈ ℝ → 𝑥 ≤ ((⌊‘𝑥) + 1)) | |
| 21 | 20 | adantl 481 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → 𝑥 ≤ ((⌊‘𝑥) + 1)) |
| 22 | max2 13133 | . . . . . 6 ⊢ ((𝑀 ∈ ℝ ∧ ((⌊‘𝑥) + 1) ∈ ℝ) → ((⌊‘𝑥) + 1) ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀)) | |
| 23 | 7, 10, 22 | syl2an 597 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → ((⌊‘𝑥) + 1) ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀)) |
| 24 | 17, 18, 19, 21, 23 | letrd 11297 | . . . 4 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → 𝑥 ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀)) |
| 25 | breq2 5090 | . . . . 5 ⊢ (𝑛 = if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) → (𝑥 ≤ 𝑛 ↔ 𝑥 ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀))) | |
| 26 | 25 | rspcev 3565 | . . . 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 585 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → ∃𝑛 ∈ 𝑍 𝑥 ≤ 𝑛) |
| 28 | 27 | ralrimiva 3130 | . 2 ⊢ (𝑀 ∈ ℤ → ∀𝑥 ∈ ℝ ∃𝑛 ∈ 𝑍 𝑥 ≤ 𝑛) |
| 29 | uzssz 12803 | . . . . . 6 ⊢ (ℤ≥‘𝑀) ⊆ ℤ | |
| 30 | 15, 29 | eqsstri 3969 | . . . . 5 ⊢ 𝑍 ⊆ ℤ |
| 31 | zssre 12525 | . . . . 5 ⊢ ℤ ⊆ ℝ | |
| 32 | 30, 31 | sstri 3932 | . . . 4 ⊢ 𝑍 ⊆ ℝ |
| 33 | ressxr 11183 | . . . 4 ⊢ ℝ ⊆ ℝ* | |
| 34 | 32, 33 | sstri 3932 | . . 3 ⊢ 𝑍 ⊆ ℝ* |
| 35 | supxrunb1 13265 | . . 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 218 | 1 ⊢ (𝑀 ∈ ℤ → sup(𝑍, ℝ*, < ) = +∞) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ∀wral 3052 ∃wrex 3062 ⊆ wss 3890 ifcif 4467 class class class wbr 5086 ‘cfv 6493 (class class class)co 7361 supcsup 9347 ℝcr 11031 1c1 11033 + caddc 11035 +∞cpnf 11170 ℝ*cxr 11172 < clt 11173 ≤ cle 11174 ℤcz 12518 ℤ≥cuz 12782 ⌊cfl 13743 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5232 ax-nul 5242 ax-pow 5303 ax-pr 5371 ax-un 7683 ax-cnex 11088 ax-resscn 11089 ax-1cn 11090 ax-icn 11091 ax-addcl 11092 ax-addrcl 11093 ax-mulcl 11094 ax-mulrcl 11095 ax-mulcom 11096 ax-addass 11097 ax-mulass 11098 ax-distr 11099 ax-i2m1 11100 ax-1ne0 11101 ax-1rid 11102 ax-rnegex 11103 ax-rrecex 11104 ax-cnre 11105 ax-pre-lttri 11106 ax-pre-lttrn 11107 ax-pre-ltadd 11108 ax-pre-mulgt0 11109 ax-pre-sup 11110 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-riota 7318 df-ov 7364 df-oprab 7365 df-mpo 7366 df-om 7812 df-2nd 7937 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-er 8637 df-en 8888 df-dom 8889 df-sdom 8890 df-sup 9349 df-inf 9350 df-pnf 11175 df-mnf 11176 df-xr 11177 df-ltxr 11178 df-le 11179 df-sub 11373 df-neg 11374 df-nn 12169 df-n0 12432 df-z 12519 df-uz 12783 df-fl 13745 |
| This theorem is referenced by: climrecl 15539 climge0 15540 caurcvg 15633 caucvg 15635 mbflimsup 25646 limsupvaluz 46157 ioodvbdlimc1lem2 46381 ioodvbdlimc2lem 46383 |
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