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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 28190 | . 2 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ∧ 𝐵 ∈ No ) ∧ ∃𝑥 ∈ No (𝐴 ·s 𝑥) = 1s ) → ∃𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵) | |
| 2 | divsmo 28184 | . . . 4 ⊢ ((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) → ∃*𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵) | |
| 3 | 2 | 3adant3 1133 | . . 3 ⊢ ((𝐴 ∈ No ∧ 𝐴 ≠ 0s ∧ 𝐵 ∈ No ) → ∃*𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵) |
| 4 | 3 | adantr 480 | . 2 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ∧ 𝐵 ∈ No ) ∧ ∃𝑥 ∈ No (𝐴 ·s 𝑥) = 1s ) → ∃*𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵) |
| 5 | reu5 3353 | . 2 ⊢ (∃!𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵 ↔ (∃𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵 ∧ ∃*𝑦 ∈ No (𝐴 ·s 𝑦) = 𝐵)) | |
| 6 | 1, 4, 5 | sylanbrc 584 | 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 395 ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 ∃wrex 3061 ∃!wreu 3349 ∃*wrmo 3350 (class class class)co 7360 No csur 27611 0s c0s 27805 1s c1s 27806 ·s cmuls 28106 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5225 ax-sep 5242 ax-nul 5252 ax-pow 5311 ax-pr 5378 ax-un 7682 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3062 df-rmo 3351 df-reu 3352 df-rab 3401 df-v 3443 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4287 df-if 4481 df-pw 4557 df-sn 4582 df-pr 4584 df-tp 4586 df-op 4588 df-ot 4590 df-uni 4865 df-int 4904 df-iun 4949 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-se 5579 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-1st 7935 df-2nd 7936 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-1o 8399 df-2o 8400 df-nadd 8596 df-no 27614 df-lts 27615 df-bday 27616 df-les 27717 df-slts 27758 df-cuts 27760 df-0s 27807 df-1s 27808 df-made 27827 df-old 27828 df-left 27830 df-right 27831 df-norec 27938 df-norec2 27949 df-adds 27960 df-negs 28021 df-subs 28022 df-muls 28107 |
| This theorem is referenced by: divmulsw 28193 divsclw 28195 |
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