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| Mirrors > Home > MPE Home > Th. List > Mathboxes > uzinico2 | Structured version Visualization version GIF version | ||
| Description: An upper interval of integers is the intersection of a larger upper interval of integers with an upper part of the reals. (Contributed by Glauco Siliprandi, 23-Oct-2021.) |
| Ref | Expression |
|---|---|
| uzinico2.1 | ⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘𝑀)) |
| Ref | Expression |
|---|---|
| uzinico2 | ⊢ (𝜑 → (ℤ≥‘𝑁) = ((ℤ≥‘𝑀) ∩ (𝑁[,)+∞))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | inass 4169 | . . . 4 ⊢ (((ℤ≥‘𝑀) ∩ ℤ) ∩ (𝑁[,)+∞)) = ((ℤ≥‘𝑀) ∩ (ℤ ∩ (𝑁[,)+∞))) | |
| 2 | 1 | a1i 11 | . . 3 ⊢ (𝜑 → (((ℤ≥‘𝑀) ∩ ℤ) ∩ (𝑁[,)+∞)) = ((ℤ≥‘𝑀) ∩ (ℤ ∩ (𝑁[,)+∞)))) |
| 3 | incom 4150 | . . . . 5 ⊢ ((ℤ≥‘𝑀) ∩ (ℤ ∩ (𝑁[,)+∞))) = ((ℤ ∩ (𝑁[,)+∞)) ∩ (ℤ≥‘𝑀)) | |
| 4 | 3 | a1i 11 | . . . 4 ⊢ (𝜑 → ((ℤ≥‘𝑀) ∩ (ℤ ∩ (𝑁[,)+∞))) = ((ℤ ∩ (𝑁[,)+∞)) ∩ (ℤ≥‘𝑀))) |
| 5 | uzssz 12809 | . . . . . . . . 9 ⊢ (ℤ≥‘𝑀) ⊆ ℤ | |
| 6 | 5 | a1i 11 | . . . . . . . 8 ⊢ (𝜑 → (ℤ≥‘𝑀) ⊆ ℤ) |
| 7 | uzinico2.1 | . . . . . . . 8 ⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘𝑀)) | |
| 8 | 6, 7 | sseldd 3923 | . . . . . . 7 ⊢ (𝜑 → 𝑁 ∈ ℤ) |
| 9 | eqid 2737 | . . . . . . 7 ⊢ (ℤ≥‘𝑁) = (ℤ≥‘𝑁) | |
| 10 | 8, 9 | uzinico 45989 | . . . . . 6 ⊢ (𝜑 → (ℤ≥‘𝑁) = (ℤ ∩ (𝑁[,)+∞))) |
| 11 | 10 | eqcomd 2743 | . . . . 5 ⊢ (𝜑 → (ℤ ∩ (𝑁[,)+∞)) = (ℤ≥‘𝑁)) |
| 12 | 11 | ineq1d 4160 | . . . 4 ⊢ (𝜑 → ((ℤ ∩ (𝑁[,)+∞)) ∩ (ℤ≥‘𝑀)) = ((ℤ≥‘𝑁) ∩ (ℤ≥‘𝑀))) |
| 13 | 7 | uzssd 45836 | . . . . 5 ⊢ (𝜑 → (ℤ≥‘𝑁) ⊆ (ℤ≥‘𝑀)) |
| 14 | dfss2 3908 | . . . . 5 ⊢ ((ℤ≥‘𝑁) ⊆ (ℤ≥‘𝑀) ↔ ((ℤ≥‘𝑁) ∩ (ℤ≥‘𝑀)) = (ℤ≥‘𝑁)) | |
| 15 | 13, 14 | sylib 218 | . . . 4 ⊢ (𝜑 → ((ℤ≥‘𝑁) ∩ (ℤ≥‘𝑀)) = (ℤ≥‘𝑁)) |
| 16 | 4, 12, 15 | 3eqtrd 2776 | . . 3 ⊢ (𝜑 → ((ℤ≥‘𝑀) ∩ (ℤ ∩ (𝑁[,)+∞))) = (ℤ≥‘𝑁)) |
| 17 | uzssz 12809 | . . . . . 6 ⊢ (ℤ≥‘𝑁) ⊆ ℤ | |
| 18 | dfss2 3908 | . . . . . 6 ⊢ ((ℤ≥‘𝑁) ⊆ ℤ ↔ ((ℤ≥‘𝑁) ∩ ℤ) = (ℤ≥‘𝑁)) | |
| 19 | 17, 18 | mpbi 230 | . . . . 5 ⊢ ((ℤ≥‘𝑁) ∩ ℤ) = (ℤ≥‘𝑁) |
| 20 | 19 | a1i 11 | . . . 4 ⊢ (𝜑 → ((ℤ≥‘𝑁) ∩ ℤ) = (ℤ≥‘𝑁)) |
| 21 | 20 | eqcomd 2743 | . . 3 ⊢ (𝜑 → (ℤ≥‘𝑁) = ((ℤ≥‘𝑁) ∩ ℤ)) |
| 22 | 2, 16, 21 | 3eqtrrd 2777 | . 2 ⊢ (𝜑 → ((ℤ≥‘𝑁) ∩ ℤ) = (((ℤ≥‘𝑀) ∩ ℤ) ∩ (𝑁[,)+∞))) |
| 23 | dfss2 3908 | . . . . 5 ⊢ ((ℤ≥‘𝑀) ⊆ ℤ ↔ ((ℤ≥‘𝑀) ∩ ℤ) = (ℤ≥‘𝑀)) | |
| 24 | 5, 23 | mpbi 230 | . . . 4 ⊢ ((ℤ≥‘𝑀) ∩ ℤ) = (ℤ≥‘𝑀) |
| 25 | 24 | ineq1i 4157 | . . 3 ⊢ (((ℤ≥‘𝑀) ∩ ℤ) ∩ (𝑁[,)+∞)) = ((ℤ≥‘𝑀) ∩ (𝑁[,)+∞)) |
| 26 | 25 | a1i 11 | . 2 ⊢ (𝜑 → (((ℤ≥‘𝑀) ∩ ℤ) ∩ (𝑁[,)+∞)) = ((ℤ≥‘𝑀) ∩ (𝑁[,)+∞))) |
| 27 | 22, 20, 26 | 3eqtr3d 2780 | 1 ⊢ (𝜑 → (ℤ≥‘𝑁) = ((ℤ≥‘𝑀) ∩ (𝑁[,)+∞))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 ∩ cin 3889 ⊆ wss 3890 ‘cfv 6499 (class class class)co 7367 +∞cpnf 11176 ℤcz 12524 ℤ≥cuz 12788 [,)cico 13300 |
| 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 5308 ax-pr 5376 ax-un 7689 ax-cnex 11094 ax-resscn 11095 ax-pre-lttri 11112 ax-pre-lttrn 11113 |
| 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-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6455 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-ov 7370 df-oprab 7371 df-mpo 7372 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-neg 11380 df-z 12525 df-uz 12789 df-ico 13304 |
| This theorem is referenced by: uzinico3 45992 limsupvaluz 46136 |
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