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| Mirrors > Home > MPE Home > Th. List > divsmo | Structured version Visualization version GIF version | ||
| Description: Uniqueness of surreal inversion. Given a nonzero 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 2791 | . . . 4 ⊢ (((𝐴 ·s 𝑥) = 𝐵 ∧ (𝐴 ·s 𝑦) = 𝐵) → (𝐴 ·s 𝑥) = (𝐴 ·s 𝑦)) | |
| 2 | simprl 782 | . . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) ∧ (𝑥 ∈ No ∧ 𝑦 ∈ No )) → 𝑥 ∈ No ) | |
| 3 | simprr 784 | . . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) ∧ (𝑥 ∈ No ∧ 𝑦 ∈ No )) → 𝑦 ∈ No ) | |
| 4 | simpll 778 | . . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) ∧ (𝑥 ∈ No ∧ 𝑦 ∈ No )) → 𝐴 ∈ No ) | |
| 5 | simplr 780 | . . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) ∧ (𝑥 ∈ No ∧ 𝑦 ∈ No )) → 𝐴 ≠ 0s ) | |
| 6 | 2, 3, 4, 5 | mulscan1d 28338 | . . . 4 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) ∧ (𝑥 ∈ No ∧ 𝑦 ∈ No )) → ((𝐴 ·s 𝑥) = (𝐴 ·s 𝑦) ↔ 𝑥 = 𝑦)) |
| 7 | 1, 6 | imbitrid 247 | . . 3 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) ∧ (𝑥 ∈ No ∧ 𝑦 ∈ No )) → (((𝐴 ·s 𝑥) = 𝐵 ∧ (𝐴 ·s 𝑦) = 𝐵) → 𝑥 = 𝑦)) |
| 8 | 7 | ralrimivva 3214 | . 2 ⊢ ((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) → ∀𝑥 ∈ No ∀𝑦 ∈ No (((𝐴 ·s 𝑥) = 𝐵 ∧ (𝐴 ·s 𝑦) = 𝐵) → 𝑥 = 𝑦)) |
| 9 | oveq2 7419 | . . . 4 ⊢ (𝑥 = 𝑦 → (𝐴 ·s 𝑥) = (𝐴 ·s 𝑦)) | |
| 10 | 9 | eqeq1d 2771 | . . 3 ⊢ (𝑥 = 𝑦 → ((𝐴 ·s 𝑥) = 𝐵 ↔ (𝐴 ·s 𝑦) = 𝐵)) |
| 11 | 10 | rmo4 3702 | . 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 237 | 1 ⊢ ((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) → ∃*𝑥 ∈ No (𝐴 ·s 𝑥) = 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 = wceq 1567 ∈ wcel 2149 ≠ wne 2964 ∀wral 3085 ∃*wrmo 3375 (class class class)co 7411 No csur 27769 0s c0s 27963 ·s cmuls 28264 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5242 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-tp 4599 df-op 4601 df-ot 4603 df-uni 4877 df-int 4917 df-iun 4962 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5557 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-se 5616 df-we 5617 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-pred 6303 df-ord 6364 df-on 6365 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-1st 7985 df-2nd 7986 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-1o 8452 df-2o 8453 df-nadd 8651 df-no 27772 df-lts 27773 df-bday 27774 df-les 27874 df-slts 27916 df-cuts 27918 df-0s 27965 df-made 27985 df-old 27986 df-left 27988 df-right 27989 df-norec 28096 df-norec2 28107 df-adds 28118 df-negs 28179 df-subs 28180 df-muls 28265 |
| This theorem is referenced by: noreceuw 28349 |
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