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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 13810 | . . . . . . . 8 ⊢ (𝑥 ∈ ℝ → (⌊‘𝑥) ∈ ℤ) | |
| 3 | 2 | peano2zd 12698 | . . . . . . 7 ⊢ (𝑥 ∈ ℝ → ((⌊‘𝑥) + 1) ∈ ℤ) |
| 4 | id 22 | . . . . . . 7 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℤ) | |
| 5 | ifcl 4546 | . . . . . . 7 ⊢ ((((⌊‘𝑥) + 1) ∈ ℤ ∧ 𝑀 ∈ ℤ) → if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) ∈ ℤ) | |
| 6 | 3, 4, 5 | syl2anr 597 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) ∈ ℤ) |
| 7 | zre 12590 | . . . . . . 7 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℝ) | |
| 8 | reflcl 13811 | . . . . . . . 8 ⊢ (𝑥 ∈ ℝ → (⌊‘𝑥) ∈ ℝ) | |
| 9 | peano2re 11406 | . . . . . . . 8 ⊢ ((⌊‘𝑥) ∈ ℝ → ((⌊‘𝑥) + 1) ∈ ℝ) | |
| 10 | 8, 9 | syl 17 | . . . . . . 7 ⊢ (𝑥 ∈ ℝ → ((⌊‘𝑥) + 1) ∈ ℝ) |
| 11 | max1 13199 | . . . . . . 7 ⊢ ((𝑀 ∈ ℝ ∧ ((⌊‘𝑥) + 1) ∈ ℝ) → 𝑀 ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀)) | |
| 12 | 7, 10, 11 | syl2an 596 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → 𝑀 ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀)) |
| 13 | eluz2 12856 | . . . . . 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 1344 | . . . . 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 2845 | . . . 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 12695 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) ∈ ℝ) |
| 20 | fllep1 13816 | . . . . . 6 ⊢ (𝑥 ∈ ℝ → 𝑥 ≤ ((⌊‘𝑥) + 1)) | |
| 21 | 20 | adantl 481 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → 𝑥 ≤ ((⌊‘𝑥) + 1)) |
| 22 | max2 13201 | . . . . . 6 ⊢ ((𝑀 ∈ ℝ ∧ ((⌊‘𝑥) + 1) ∈ ℝ) → ((⌊‘𝑥) + 1) ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀)) | |
| 23 | 7, 10, 22 | syl2an 596 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → ((⌊‘𝑥) + 1) ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀)) |
| 24 | 17, 18, 19, 21, 23 | letrd 11390 | . . . 4 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → 𝑥 ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀)) |
| 25 | breq2 5123 | . . . . 5 ⊢ (𝑛 = if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀) → (𝑥 ≤ 𝑛 ↔ 𝑥 ≤ if(𝑀 ≤ ((⌊‘𝑥) + 1), ((⌊‘𝑥) + 1), 𝑀))) | |
| 26 | 25 | rspcev 3601 | . . . 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 584 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑥 ∈ ℝ) → ∃𝑛 ∈ 𝑍 𝑥 ≤ 𝑛) |
| 28 | 27 | ralrimiva 3132 | . 2 ⊢ (𝑀 ∈ ℤ → ∀𝑥 ∈ ℝ ∃𝑛 ∈ 𝑍 𝑥 ≤ 𝑛) |
| 29 | uzssz 12871 | . . . . . 6 ⊢ (ℤ≥‘𝑀) ⊆ ℤ | |
| 30 | 15, 29 | eqsstri 4005 | . . . . 5 ⊢ 𝑍 ⊆ ℤ |
| 31 | zssre 12593 | . . . . 5 ⊢ ℤ ⊆ ℝ | |
| 32 | 30, 31 | sstri 3968 | . . . 4 ⊢ 𝑍 ⊆ ℝ |
| 33 | ressxr 11277 | . . . 4 ⊢ ℝ ⊆ ℝ* | |
| 34 | 32, 33 | sstri 3968 | . . 3 ⊢ 𝑍 ⊆ ℝ* |
| 35 | supxrunb1 13333 | . . 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 1540 ∈ wcel 2108 ∀wral 3051 ∃wrex 3060 ⊆ wss 3926 ifcif 4500 class class class wbr 5119 ‘cfv 6530 (class class class)co 7403 supcsup 9450 ℝcr 11126 1c1 11128 + caddc 11130 +∞cpnf 11264 ℝ*cxr 11266 < clt 11267 ≤ cle 11268 ℤcz 12586 ℤ≥cuz 12850 ⌊cfl 13805 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2707 ax-sep 5266 ax-nul 5276 ax-pow 5335 ax-pr 5402 ax-un 7727 ax-cnex 11183 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 ax-pre-mulgt0 11204 ax-pre-sup 11205 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2809 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3359 df-reu 3360 df-rab 3416 df-v 3461 df-sbc 3766 df-csb 3875 df-dif 3929 df-un 3931 df-in 3933 df-ss 3943 df-pss 3946 df-nul 4309 df-if 4501 df-pw 4577 df-sn 4602 df-pr 4604 df-op 4608 df-uni 4884 df-iun 4969 df-br 5120 df-opab 5182 df-mpt 5202 df-tr 5230 df-id 5548 df-eprel 5553 df-po 5561 df-so 5562 df-fr 5606 df-we 5608 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-res 5666 df-ima 5667 df-pred 6290 df-ord 6355 df-on 6356 df-lim 6357 df-suc 6358 df-iota 6483 df-fun 6532 df-fn 6533 df-f 6534 df-f1 6535 df-fo 6536 df-f1o 6537 df-fv 6538 df-riota 7360 df-ov 7406 df-oprab 7407 df-mpo 7408 df-om 7860 df-2nd 7987 df-frecs 8278 df-wrecs 8309 df-recs 8383 df-rdg 8422 df-er 8717 df-en 8958 df-dom 8959 df-sdom 8960 df-sup 9452 df-inf 9453 df-pnf 11269 df-mnf 11270 df-xr 11271 df-ltxr 11272 df-le 11273 df-sub 11466 df-neg 11467 df-nn 12239 df-n0 12500 df-z 12587 df-uz 12851 df-fl 13807 |
| This theorem is referenced by: climrecl 15597 climge0 15598 caurcvg 15691 caucvg 15693 mbflimsup 25617 limsupvaluz 45685 ioodvbdlimc1lem2 45909 ioodvbdlimc2lem 45911 |
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