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| Mirrors > Home > MPE Home > Th. List > divsmo | Structured version Visualization version GIF version | ||
| Description: Uniqueness of surreal inversion. Given a non-zero surreal 𝐴, there is at most one surreal giving a particular product. (Contributed by Scott Fenton, 10-Mar-2025.) |
| Ref | Expression |
|---|---|
| divsmo | ⊢ ((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) → ∃*𝑥 ∈ No (𝐴 ·s 𝑥) = 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqtr3 2756 | . . . 4 ⊢ (((𝐴 ·s 𝑥) = 𝐵 ∧ (𝐴 ·s 𝑦) = 𝐵) → (𝐴 ·s 𝑥) = (𝐴 ·s 𝑦)) | |
| 2 | simprl 770 | . . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) ∧ (𝑥 ∈ No ∧ 𝑦 ∈ No )) → 𝑥 ∈ No ) | |
| 3 | simprr 772 | . . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) ∧ (𝑥 ∈ No ∧ 𝑦 ∈ No )) → 𝑦 ∈ No ) | |
| 4 | simpll 766 | . . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) ∧ (𝑥 ∈ No ∧ 𝑦 ∈ No )) → 𝐴 ∈ No ) | |
| 5 | simplr 768 | . . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) ∧ (𝑥 ∈ No ∧ 𝑦 ∈ No )) → 𝐴 ≠ 0s ) | |
| 6 | 2, 3, 4, 5 | mulscan1d 28149 | . . . 4 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) ∧ (𝑥 ∈ No ∧ 𝑦 ∈ No )) → ((𝐴 ·s 𝑥) = (𝐴 ·s 𝑦) ↔ 𝑥 = 𝑦)) |
| 7 | 1, 6 | imbitrid 244 | . . 3 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) ∧ (𝑥 ∈ No ∧ 𝑦 ∈ No )) → (((𝐴 ·s 𝑥) = 𝐵 ∧ (𝐴 ·s 𝑦) = 𝐵) → 𝑥 = 𝑦)) |
| 8 | 7 | ralrimivva 3177 | . 2 ⊢ ((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) → ∀𝑥 ∈ No ∀𝑦 ∈ No (((𝐴 ·s 𝑥) = 𝐵 ∧ (𝐴 ·s 𝑦) = 𝐵) → 𝑥 = 𝑦)) |
| 9 | oveq2 7364 | . . . 4 ⊢ (𝑥 = 𝑦 → (𝐴 ·s 𝑥) = (𝐴 ·s 𝑦)) | |
| 10 | 9 | eqeq1d 2736 | . . 3 ⊢ (𝑥 = 𝑦 → ((𝐴 ·s 𝑥) = 𝐵 ↔ (𝐴 ·s 𝑦) = 𝐵)) |
| 11 | 10 | rmo4 3686 | . 2 ⊢ (∃*𝑥 ∈ No (𝐴 ·s 𝑥) = 𝐵 ↔ ∀𝑥 ∈ No ∀𝑦 ∈ No (((𝐴 ·s 𝑥) = 𝐵 ∧ (𝐴 ·s 𝑦) = 𝐵) → 𝑥 = 𝑦)) |
| 12 | 8, 11 | sylibr 234 | 1 ⊢ ((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) → ∃*𝑥 ∈ No (𝐴 ·s 𝑥) = 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 ∈ wcel 2113 ≠ wne 2930 ∀wral 3049 ∃*wrmo 3347 (class class class)co 7356 No csur 27605 0s c0s 27793 ·s cmuls 28075 |
| 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 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-rep 5222 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 |
| 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 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-ral 3050 df-rex 3059 df-rmo 3348 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-tp 4583 df-op 4585 df-ot 4587 df-uni 4862 df-int 4901 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-tr 5204 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-se 5576 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-1st 7931 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-1o 8395 df-2o 8396 df-nadd 8592 df-no 27608 df-slt 27609 df-bday 27610 df-sle 27711 df-sslt 27748 df-scut 27750 df-0s 27795 df-made 27815 df-old 27816 df-left 27818 df-right 27819 df-norec 27908 df-norec2 27919 df-adds 27930 df-negs 27990 df-subs 27991 df-muls 28076 |
| This theorem is referenced by: noreceuw 28160 |
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