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Mathbox for Thierry Arnoux |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > dya2iocct | Structured version Visualization version GIF version |
Description: The dyadic rectangle set is countable. (Contributed by Thierry Arnoux, 18-Sep-2017.) (Revised by Thierry Arnoux, 11-Oct-2017.) |
Ref | Expression |
---|---|
sxbrsiga.0 | ⊢ 𝐽 = (topGen‘ran (,)) |
dya2ioc.1 | ⊢ 𝐼 = (𝑥 ∈ ℤ, 𝑛 ∈ ℤ ↦ ((𝑥 / (2↑𝑛))[,)((𝑥 + 1) / (2↑𝑛)))) |
dya2ioc.2 | ⊢ 𝑅 = (𝑢 ∈ ran 𝐼, 𝑣 ∈ ran 𝐼 ↦ (𝑢 × 𝑣)) |
Ref | Expression |
---|---|
dya2iocct | ⊢ ran 𝑅 ≼ ω |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dya2ioc.1 | . . . 4 ⊢ 𝐼 = (𝑥 ∈ ℤ, 𝑛 ∈ ℤ ↦ ((𝑥 / (2↑𝑛))[,)((𝑥 + 1) / (2↑𝑛)))) | |
2 | znnen 15557 | . . . . . 6 ⊢ ℤ ≈ ℕ | |
3 | nnct 13344 | . . . . . 6 ⊢ ℕ ≼ ω | |
4 | endomtr 8550 | . . . . . 6 ⊢ ((ℤ ≈ ℕ ∧ ℕ ≼ ω) → ℤ ≼ ω) | |
5 | 2, 3, 4 | mp2an 691 | . . . . 5 ⊢ ℤ ≼ ω |
6 | ovex 7168 | . . . . . . 7 ⊢ ((𝑥 / (2↑𝑛))[,)((𝑥 + 1) / (2↑𝑛))) ∈ V | |
7 | 6 | rgen2w 3119 | . . . . . 6 ⊢ ∀𝑥 ∈ ℤ ∀𝑛 ∈ ℤ ((𝑥 / (2↑𝑛))[,)((𝑥 + 1) / (2↑𝑛))) ∈ V |
8 | 7 | mpocti 30477 | . . . . 5 ⊢ ((ℤ ≼ ω ∧ ℤ ≼ ω) → (𝑥 ∈ ℤ, 𝑛 ∈ ℤ ↦ ((𝑥 / (2↑𝑛))[,)((𝑥 + 1) / (2↑𝑛)))) ≼ ω) |
9 | 5, 5, 8 | mp2an 691 | . . . 4 ⊢ (𝑥 ∈ ℤ, 𝑛 ∈ ℤ ↦ ((𝑥 / (2↑𝑛))[,)((𝑥 + 1) / (2↑𝑛)))) ≼ ω |
10 | 1, 9 | eqbrtri 5051 | . . 3 ⊢ 𝐼 ≼ ω |
11 | rnct 9936 | . . 3 ⊢ (𝐼 ≼ ω → ran 𝐼 ≼ ω) | |
12 | 10, 11 | ax-mp 5 | . 2 ⊢ ran 𝐼 ≼ ω |
13 | vex 3444 | . . . . . 6 ⊢ 𝑢 ∈ V | |
14 | vex 3444 | . . . . . 6 ⊢ 𝑣 ∈ V | |
15 | 13, 14 | xpex 7456 | . . . . 5 ⊢ (𝑢 × 𝑣) ∈ V |
16 | 15 | rgen2w 3119 | . . . 4 ⊢ ∀𝑢 ∈ ran 𝐼∀𝑣 ∈ ran 𝐼(𝑢 × 𝑣) ∈ V |
17 | 16 | mpocti 30477 | . . 3 ⊢ ((ran 𝐼 ≼ ω ∧ ran 𝐼 ≼ ω) → (𝑢 ∈ ran 𝐼, 𝑣 ∈ ran 𝐼 ↦ (𝑢 × 𝑣)) ≼ ω) |
18 | dya2ioc.2 | . . . . 5 ⊢ 𝑅 = (𝑢 ∈ ran 𝐼, 𝑣 ∈ ran 𝐼 ↦ (𝑢 × 𝑣)) | |
19 | 18 | breq1i 5037 | . . . 4 ⊢ (𝑅 ≼ ω ↔ (𝑢 ∈ ran 𝐼, 𝑣 ∈ ran 𝐼 ↦ (𝑢 × 𝑣)) ≼ ω) |
20 | 19 | biimpri 231 | . . 3 ⊢ ((𝑢 ∈ ran 𝐼, 𝑣 ∈ ran 𝐼 ↦ (𝑢 × 𝑣)) ≼ ω → 𝑅 ≼ ω) |
21 | rnct 9936 | . . 3 ⊢ (𝑅 ≼ ω → ran 𝑅 ≼ ω) | |
22 | 17, 20, 21 | 3syl 18 | . 2 ⊢ ((ran 𝐼 ≼ ω ∧ ran 𝐼 ≼ ω) → ran 𝑅 ≼ ω) |
23 | 12, 12, 22 | mp2an 691 | 1 ⊢ ran 𝑅 ≼ ω |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 399 = wceq 1538 ∈ wcel 2111 Vcvv 3441 class class class wbr 5030 × cxp 5517 ran crn 5520 ‘cfv 6324 (class class class)co 7135 ∈ cmpo 7137 ωcom 7560 ≈ cen 8489 ≼ cdom 8490 1c1 10527 + caddc 10529 / cdiv 11286 ℕcn 11625 2c2 11680 ℤcz 11969 (,)cioo 12726 [,)cico 12728 ↑cexp 13425 topGenctg 16703 |
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 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-rep 5154 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 ax-inf2 9088 ax-ac2 9874 ax-cnex 10582 ax-resscn 10583 ax-1cn 10584 ax-icn 10585 ax-addcl 10586 ax-addrcl 10587 ax-mulcl 10588 ax-mulrcl 10589 ax-mulcom 10590 ax-addass 10591 ax-mulass 10592 ax-distr 10593 ax-i2m1 10594 ax-1ne0 10595 ax-1rid 10596 ax-rnegex 10597 ax-rrecex 10598 ax-cnre 10599 ax-pre-lttri 10600 ax-pre-lttrn 10601 ax-pre-ltadd 10602 ax-pre-mulgt0 10603 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-nel 3092 df-ral 3111 df-rex 3112 df-reu 3113 df-rmo 3114 df-rab 3115 df-v 3443 df-sbc 3721 df-csb 3829 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-pss 3900 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-tp 4530 df-op 4532 df-uni 4801 df-int 4839 df-iun 4883 df-br 5031 df-opab 5093 df-mpt 5111 df-tr 5137 df-id 5425 df-eprel 5430 df-po 5438 df-so 5439 df-fr 5478 df-se 5479 df-we 5480 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-pred 6116 df-ord 6162 df-on 6163 df-lim 6164 df-suc 6165 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 df-fv 6332 df-isom 6333 df-riota 7093 df-ov 7138 df-oprab 7139 df-mpo 7140 df-om 7561 df-1st 7671 df-2nd 7672 df-wrecs 7930 df-recs 7991 df-rdg 8029 df-1o 8085 df-oadd 8089 df-omul 8090 df-er 8272 df-map 8391 df-en 8493 df-dom 8494 df-sdom 8495 df-fin 8496 df-oi 8958 df-card 9352 df-acn 9355 df-ac 9527 df-pnf 10666 df-mnf 10667 df-xr 10668 df-ltxr 10669 df-le 10670 df-sub 10861 df-neg 10862 df-nn 11626 df-n0 11886 df-z 11970 df-uz 12232 |
This theorem is referenced by: sxbrsigalem1 31653 |
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