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| Mirrors > Home > MPE Home > Th. List > noreceuw | Structured version Visualization version GIF version | ||
| Description: If a surreal has a reciprocal, then it has unique division. (Contributed by Scott Fenton, 12-Mar-2025.) |
| Ref | Expression |
|---|---|
| noreceuw | ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ∧ 𝐵 ∈ No ) ∧ ∃𝑥 ∈ No (𝐴 ·s 𝑥) = 1s ) → ∃!𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | norecdiv 28285 | . 2 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ∧ 𝐵 ∈ No ) ∧ ∃𝑥 ∈ No (𝐴 ·s 𝑥) = 1s ) → ∃𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵) | |
| 2 | divsmo 28279 | . . . 4 ⊢ ((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) → ∃*𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵) | |
| 3 | 2 | 3adant3 1146 | . . 3 ⊢ ((𝐴 ∈ No ∧ 𝐴 ≠ 0s ∧ 𝐵 ∈ No ) → ∃*𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵) |
| 4 | 3 | adantr 484 | . 2 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ∧ 𝐵 ∈ No ) ∧ ∃𝑥 ∈ No (𝐴 ·s 𝑥) = 1s ) → ∃*𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵) |
| 5 | reu5 3371 | . 2 ⊢ (∃!𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵 ↔ (∃𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵 ∧ ∃*𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵)) | |
| 6 | 1, 4, 5 | sylanbrc 592 | 1 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ∧ 𝐵 ∈ No ) ∧ ∃𝑥 ∈ No (𝐴 ·s 𝑥) = 1s ) → ∃!𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 399 ∧ w3a 1099 = wceq 1562 ∈ wcel 2144 ≠ wne 2959 ∃wrex 3088 ∃!wreu 3367 ∃*wrmo 3368 (class class class)co 7398 No csur 27706 0s c0s 27900 1s c1s 27901 ·s cmuls 28201 |
| 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-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-1st 7972 df-2nd 7973 df-frecs 8264 df-wrecs 8295 df-recs 8344 df-1o 8439 df-2o 8440 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 |
| This theorem is referenced by: divmulsw 28288 divsclw 28290 |
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