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| Mirrors > Home > MPE Home > Th. List > zs12no | Structured version Visualization version GIF version | ||
| Description: A dyadic is a surreal. (Contributed by Scott Fenton, 11-Dec-2025.) |
| Ref | Expression |
|---|---|
| zs12no | ⊢ (𝐴 ∈ ℤs[1/2] → 𝐴 ∈ No ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elzs12 28383 | . 2 ⊢ (𝐴 ∈ ℤs[1/2] ↔ ∃𝑎 ∈ ℤs ∃𝑛 ∈ ℕ0s 𝐴 = (𝑎 /su (2s↑s𝑛))) | |
| 2 | zno 28306 | . . . . . 6 ⊢ (𝑎 ∈ ℤs → 𝑎 ∈ No ) | |
| 3 | 2 | adantr 480 | . . . . 5 ⊢ ((𝑎 ∈ ℤs ∧ 𝑛 ∈ ℕ0s) → 𝑎 ∈ No ) |
| 4 | simpr 484 | . . . . 5 ⊢ ((𝑎 ∈ ℤs ∧ 𝑛 ∈ ℕ0s) → 𝑛 ∈ ℕ0s) | |
| 5 | 3, 4 | pw2divscld 28362 | . . . 4 ⊢ ((𝑎 ∈ ℤs ∧ 𝑛 ∈ ℕ0s) → (𝑎 /su (2s↑s𝑛)) ∈ No ) |
| 6 | eleq1 2819 | . . . 4 ⊢ (𝐴 = (𝑎 /su (2s↑s𝑛)) → (𝐴 ∈ No ↔ (𝑎 /su (2s↑s𝑛)) ∈ No )) | |
| 7 | 5, 6 | syl5ibrcom 247 | . . 3 ⊢ ((𝑎 ∈ ℤs ∧ 𝑛 ∈ ℕ0s) → (𝐴 = (𝑎 /su (2s↑s𝑛)) → 𝐴 ∈ No )) |
| 8 | 7 | rexlimivv 3174 | . 2 ⊢ (∃𝑎 ∈ ℤs ∃𝑛 ∈ ℕ0s 𝐴 = (𝑎 /su (2s↑s𝑛)) → 𝐴 ∈ No ) |
| 9 | 1, 8 | sylbi 217 | 1 ⊢ (𝐴 ∈ ℤs[1/2] → 𝐴 ∈ No ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 ∈ wcel 2111 ∃wrex 3056 (class class class)co 7346 No csur 27578 /su cdivs 28126 ℕ0scnn0s 28242 ℤsczs 28302 2sc2s 28333 ↑scexps 28335 ℤs[1/2]czs12 28337 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-rep 5215 ax-sep 5232 ax-nul 5242 ax-pow 5301 ax-pr 5368 ax-un 7668 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-ral 3048 df-rex 3057 df-rmo 3346 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-pss 3917 df-nul 4281 df-if 4473 df-pw 4549 df-sn 4574 df-pr 4576 df-tp 4578 df-op 4580 df-ot 4582 df-uni 4857 df-int 4896 df-iun 4941 df-br 5090 df-opab 5152 df-mpt 5171 df-tr 5197 df-id 5509 df-eprel 5514 df-po 5522 df-so 5523 df-fr 5567 df-se 5568 df-we 5569 df-xp 5620 df-rel 5621 df-cnv 5622 df-co 5623 df-dm 5624 df-rn 5625 df-res 5626 df-ima 5627 df-pred 6248 df-ord 6309 df-on 6310 df-lim 6311 df-suc 6312 df-iota 6437 df-fun 6483 df-fn 6484 df-f 6485 df-f1 6486 df-fo 6487 df-f1o 6488 df-fv 6489 df-riota 7303 df-ov 7349 df-oprab 7350 df-mpo 7351 df-om 7797 df-1st 7921 df-2nd 7922 df-frecs 8211 df-wrecs 8242 df-recs 8291 df-rdg 8329 df-1o 8385 df-2o 8386 df-oadd 8389 df-nadd 8581 df-no 27581 df-slt 27582 df-bday 27583 df-sle 27684 df-sslt 27721 df-scut 27723 df-0s 27768 df-1s 27769 df-made 27788 df-old 27789 df-left 27791 df-right 27792 df-norec 27881 df-norec2 27892 df-adds 27903 df-negs 27963 df-subs 27964 df-muls 28046 df-divs 28127 df-seqs 28214 df-n0s 28244 df-nns 28245 df-zs 28303 df-2s 28334 df-exps 28336 df-zs12 28338 |
| This theorem is referenced by: zs12subscl 28389 |
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