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| Mirrors > Home > MPE Home > Th. List > eluzuzle | Structured version Visualization version GIF version | ||
| Description: An integer in an upper set of integers is an element of an upper set of integers with a smaller bound. (Contributed by Alexander van der Vekens, 17-Jun-2018.) |
| Ref | Expression |
|---|---|
| eluzuzle | ⊢ ((𝐵 ∈ ℤ ∧ 𝐵 ≤ 𝐴) → (𝐶 ∈ (ℤ≥‘𝐴) → 𝐶 ∈ (ℤ≥‘𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eluz2 12863 | . 2 ⊢ (𝐶 ∈ (ℤ≥‘𝐴) ↔ (𝐴 ∈ ℤ ∧ 𝐶 ∈ ℤ ∧ 𝐴 ≤ 𝐶)) | |
| 2 | simpll 766 | . . . 4 ⊢ (((𝐵 ∈ ℤ ∧ 𝐵 ≤ 𝐴) ∧ (𝐴 ∈ ℤ ∧ 𝐶 ∈ ℤ ∧ 𝐴 ≤ 𝐶)) → 𝐵 ∈ ℤ) | |
| 3 | simpr2 1196 | . . . 4 ⊢ (((𝐵 ∈ ℤ ∧ 𝐵 ≤ 𝐴) ∧ (𝐴 ∈ ℤ ∧ 𝐶 ∈ ℤ ∧ 𝐴 ≤ 𝐶)) → 𝐶 ∈ ℤ) | |
| 4 | zre 12597 | . . . . . 6 ⊢ (𝐵 ∈ ℤ → 𝐵 ∈ ℝ) | |
| 5 | 4 | ad2antrr 726 | . . . . 5 ⊢ (((𝐵 ∈ ℤ ∧ 𝐵 ≤ 𝐴) ∧ (𝐴 ∈ ℤ ∧ 𝐶 ∈ ℤ ∧ 𝐴 ≤ 𝐶)) → 𝐵 ∈ ℝ) |
| 6 | zre 12597 | . . . . . . 7 ⊢ (𝐴 ∈ ℤ → 𝐴 ∈ ℝ) | |
| 7 | 6 | 3ad2ant1 1133 | . . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ 𝐶 ∈ ℤ ∧ 𝐴 ≤ 𝐶) → 𝐴 ∈ ℝ) |
| 8 | 7 | adantl 481 | . . . . 5 ⊢ (((𝐵 ∈ ℤ ∧ 𝐵 ≤ 𝐴) ∧ (𝐴 ∈ ℤ ∧ 𝐶 ∈ ℤ ∧ 𝐴 ≤ 𝐶)) → 𝐴 ∈ ℝ) |
| 9 | zre 12597 | . . . . . . 7 ⊢ (𝐶 ∈ ℤ → 𝐶 ∈ ℝ) | |
| 10 | 9 | 3ad2ant2 1134 | . . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ 𝐶 ∈ ℤ ∧ 𝐴 ≤ 𝐶) → 𝐶 ∈ ℝ) |
| 11 | 10 | adantl 481 | . . . . 5 ⊢ (((𝐵 ∈ ℤ ∧ 𝐵 ≤ 𝐴) ∧ (𝐴 ∈ ℤ ∧ 𝐶 ∈ ℤ ∧ 𝐴 ≤ 𝐶)) → 𝐶 ∈ ℝ) |
| 12 | simplr 768 | . . . . 5 ⊢ (((𝐵 ∈ ℤ ∧ 𝐵 ≤ 𝐴) ∧ (𝐴 ∈ ℤ ∧ 𝐶 ∈ ℤ ∧ 𝐴 ≤ 𝐶)) → 𝐵 ≤ 𝐴) | |
| 13 | simpr3 1197 | . . . . 5 ⊢ (((𝐵 ∈ ℤ ∧ 𝐵 ≤ 𝐴) ∧ (𝐴 ∈ ℤ ∧ 𝐶 ∈ ℤ ∧ 𝐴 ≤ 𝐶)) → 𝐴 ≤ 𝐶) | |
| 14 | 5, 8, 11, 12, 13 | letrd 11397 | . . . 4 ⊢ (((𝐵 ∈ ℤ ∧ 𝐵 ≤ 𝐴) ∧ (𝐴 ∈ ℤ ∧ 𝐶 ∈ ℤ ∧ 𝐴 ≤ 𝐶)) → 𝐵 ≤ 𝐶) |
| 15 | eluz2 12863 | . . . 4 ⊢ (𝐶 ∈ (ℤ≥‘𝐵) ↔ (𝐵 ∈ ℤ ∧ 𝐶 ∈ ℤ ∧ 𝐵 ≤ 𝐶)) | |
| 16 | 2, 3, 14, 15 | syl3anbrc 1344 | . . 3 ⊢ (((𝐵 ∈ ℤ ∧ 𝐵 ≤ 𝐴) ∧ (𝐴 ∈ ℤ ∧ 𝐶 ∈ ℤ ∧ 𝐴 ≤ 𝐶)) → 𝐶 ∈ (ℤ≥‘𝐵)) |
| 17 | 16 | ex 412 | . 2 ⊢ ((𝐵 ∈ ℤ ∧ 𝐵 ≤ 𝐴) → ((𝐴 ∈ ℤ ∧ 𝐶 ∈ ℤ ∧ 𝐴 ≤ 𝐶) → 𝐶 ∈ (ℤ≥‘𝐵))) |
| 18 | 1, 17 | biimtrid 242 | 1 ⊢ ((𝐵 ∈ ℤ ∧ 𝐵 ≤ 𝐴) → (𝐶 ∈ (ℤ≥‘𝐴) → 𝐶 ∈ (ℤ≥‘𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1086 ∈ wcel 2109 class class class wbr 5124 ‘cfv 6536 ℝcr 11133 ≤ cle 11275 ℤcz 12593 ℤ≥cuz 12857 |
| 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 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2708 ax-sep 5271 ax-nul 5281 ax-pow 5340 ax-pr 5407 ax-un 7734 ax-cnex 11190 ax-resscn 11191 ax-pre-lttri 11208 ax-pre-lttrn 11209 |
| 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 2066 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2810 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3062 df-rab 3421 df-v 3466 df-sbc 3771 df-csb 3880 df-dif 3934 df-un 3936 df-in 3938 df-ss 3948 df-nul 4314 df-if 4506 df-pw 4582 df-sn 4607 df-pr 4609 df-op 4613 df-uni 4889 df-br 5125 df-opab 5187 df-mpt 5207 df-id 5553 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-iota 6489 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-ov 7413 df-er 8724 df-en 8965 df-dom 8966 df-sdom 8967 df-pnf 11276 df-mnf 11277 df-xr 11278 df-ltxr 11279 df-le 11280 df-neg 11474 df-z 12594 df-uz 12858 |
| This theorem is referenced by: eluz2nn 12903 eluz4eluz2 12904 eluz4eluz3 12905 uzuzle23 12910 eluzge3nn 12911 setsstruct 17200 wwlksubclwwlk 30044 smonoord 47365 wtgoldbnnsum4prm 47796 bgoldbnnsum3prm 47798 |
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