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| Mirrors > Home > MPE Home > Th. List > pw2divscld | Structured version Visualization version GIF version | ||
| Description: Division closure for powers of two. (Contributed by Scott Fenton, 7-Nov-2025.) |
| Ref | Expression |
|---|---|
| pw2divscld.1 | ⊢ (𝜑 → 𝐴 ∈ No ) |
| pw2divscld.2 | ⊢ (𝜑 → 𝑁 ∈ ℕ0s) |
| Ref | Expression |
|---|---|
| pw2divscld | ⊢ (𝜑 → (𝐴 /su (2s↑s𝑁)) ∈ No ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pw2divscld.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ No ) | |
| 2 | 2no 28514 | . . 3 ⊢ 2s ∈ No | |
| 3 | pw2divscld.2 | . . 3 ⊢ (𝜑 → 𝑁 ∈ ℕ0s) | |
| 4 | expscl 28526 | . . 3 ⊢ ((2s ∈ No ∧ 𝑁 ∈ ℕ0s) → (2s↑s𝑁) ∈ No ) | |
| 5 | 2, 3, 4 | sylancr 596 | . 2 ⊢ (𝜑 → (2s↑s𝑁) ∈ No ) |
| 6 | 2ne0s 28515 | . . 3 ⊢ 2s ≠ 0s | |
| 7 | expsne0 28531 | . . 3 ⊢ ((2s ∈ No ∧ 2s ≠ 0s ∧ 𝑁 ∈ ℕ0s) → (2s↑s𝑁) ≠ 0s ) | |
| 8 | 2, 6, 3, 7 | mp3an12i 1488 | . 2 ⊢ (𝜑 → (2s↑s𝑁) ≠ 0s ) |
| 9 | pw2recs 28533 | . . 3 ⊢ (𝑁 ∈ ℕ0s → ∃𝑥 ∈ No ((2s↑s𝑁) ·s 𝑥) = 1s ) | |
| 10 | 3, 9 | syl 17 | . 2 ⊢ (𝜑 → ∃𝑥 ∈ No ((2s↑s𝑁) ·s 𝑥) = 1s ) |
| 11 | 1, 5, 8, 10 | divsclwd 28291 | 1 ⊢ (𝜑 → (𝐴 /su (2s↑s𝑁)) ∈ No ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1562 ∈ wcel 2144 ≠ wne 2959 ∃wrex 3088 (class class class)co 7398 No csur 27706 0s c0s 27900 1s c1s 27901 ·s cmuls 28201 /su cdivs 28282 ℕ0scn0s 28407 2sc2s 28505 ↑scexps 28507 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1817 ax-4 1831 ax-5 1932 ax-6 1989 ax-7 2030 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2214 ax-ext 2736 ax-rep 5229 ax-sep 5248 ax-nul 5258 ax-pow 5324 ax-pr 5392 ax-un 7720 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1565 df-fal 1575 df-ex 1802 df-nf 1806 df-sb 2093 df-mo 2568 df-eu 2598 df-clab 2743 df-cleq 2756 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3079 df-rex 3089 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3458 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-ot 4593 df-uni 4868 df-int 4908 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5544 df-eprel 5549 df-po 5557 df-so 5558 df-fr 5602 df-se 5603 df-we 5604 df-xp 5655 df-rel 5656 df-cnv 5657 df-co 5658 df-dm 5659 df-rn 5660 df-res 5661 df-ima 5662 df-pred 6290 df-ord 6351 df-on 6352 df-lim 6353 df-suc 6354 df-iota 6479 df-fun 6525 df-fn 6526 df-f 6527 df-f1 6528 df-fo 6529 df-f1o 6530 df-fv 6531 df-riota 7355 df-ov 7401 df-oprab 7402 df-mpo 7403 df-om 7849 df-1st 7972 df-2nd 7973 df-frecs 8264 df-wrecs 8295 df-recs 8344 df-rdg 8383 df-1o 8439 df-2o 8440 df-oadd 8443 df-nadd 8638 df-no 27709 df-lts 27710 df-bday 27711 df-les 27811 df-slts 27853 df-cuts 27855 df-0s 27902 df-1s 27903 df-made 27922 df-old 27923 df-left 27925 df-right 27926 df-norec 28033 df-norec2 28044 df-adds 28055 df-negs 28116 df-subs 28117 df-muls 28202 df-divs 28283 df-seqs 28379 df-n0s 28409 df-nns 28410 df-zs 28474 df-2s 28506 df-exps 28508 |
| This theorem is referenced by: pw2divscan4d 28539 pw2gt0divsd 28540 pw2ge0divsd 28541 pw2divsrecd 28542 pw2divsdird 28543 pw2divsnegd 28544 pw2ltsdiv1d 28547 pw2cut2 28557 bdaypw2n0bndlem 28558 bdaypw2bnd 28560 bdayfinbndlem1 28562 z12bdaylem1 28565 z12bdaylem2 28566 z12no 28571 z12shalf 28575 z12zsodd 28577 z12sge0 28578 z12bdaylem 28579 |
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