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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 28487 | . 2 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ∧ 𝐵 ∈ No ) ∧ ∃𝑥 ∈ No (𝐴 ·s 𝑥) = 1s ) → ∃𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵) | |
| 2 | divsmo 28481 | . . . 4 ⊢ ((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) → ∃*𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵) | |
| 3 | 2 | 3adant3 1150 | . . 3 ⊢ ((𝐴 ∈ No ∧ 𝐴 ≠ 0s ∧ 𝐵 ∈ No ) → ∃*𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵) |
| 4 | 3 | adantr 486 | . 2 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ∧ 𝐵 ∈ No ) ∧ ∃𝑥 ∈ No (𝐴 ·s 𝑥) = 1s ) → ∃*𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵) |
| 5 | reu5 3367 | . 2 ⊢ (∃!𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵 ↔ (∃𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵 ∧ ∃*𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵)) | |
| 6 | 1, 4, 5 | sylanbrc 595 | 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 |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∧ w3a 1103 = wceq 1570 ∈ wcel 2145 ≠ wne 2955 ∃wrex 3086 ∃!wreu 3363 ∃*wrmo 3364 (class class class)co 7416 No csur 27908 0s c0s 28102 1s c1s 28103 ·s cmuls 28403 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7742 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 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 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-se 5609 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6301 df-ord 6362 df-on 6363 df-suc 6365 df-iota 6491 df-fun 6537 df-fn 6538 df-f 6539 df-f1 6540 df-fo 6541 df-f1o 6542 df-fv 6543 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-1st 7992 df-2nd 7993 df-frecs 8285 df-wrecs 8316 df-recs 8365 df-1o 8462 df-2o 8463 df-nadd 8661 df-no 27911 df-lts 27912 df-bday 27913 df-les 28013 df-slts 28055 df-cuts 28057 df-0s 28104 df-1s 28105 df-made 28124 df-old 28125 df-left 28127 df-right 28128 df-norec 28235 df-norec2 28246 df-adds 28257 df-negs 28318 df-subs 28319 df-muls 28404 |
| This theorem is used by: divmulsw 28490 divsclw 28492 |
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