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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 2787 | . . . 4 ⊢ (((𝐴 ·s 𝑥) = 𝐵 ∧ (𝐴 ·s 𝑦) = 𝐵) → (𝐴 ·s 𝑥) = (𝐴 ·s 𝑦)) | |
| 2 | simprl 783 | . . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) ∧ (𝑥 ∈ No ∧ 𝑦 ∈ No )) → 𝑥 ∈ No ) | |
| 3 | simprr 785 | . . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) ∧ (𝑥 ∈ No ∧ 𝑦 ∈ No )) → 𝑦 ∈ No ) | |
| 4 | simpll 779 | . . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) ∧ (𝑥 ∈ No ∧ 𝑦 ∈ No )) → 𝐴 ∈ No ) | |
| 5 | simplr 781 | . . . . 5 ⊢ (((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) ∧ (𝑥 ∈ No ∧ 𝑦 ∈ No )) → 𝐴 ≠ 0s ) | |
| 6 | 2, 3, 4, 5 | mulscan1d 28426 | . . . 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 3210 | . 2 ⊢ ((𝐴 ∈ No ∧ 𝐴 ≠ 0s ) → ∀𝑥 ∈ No ∀𝑦 ∈ No (((𝐴 ·s 𝑥) = 𝐵 ∧ (𝐴 ·s 𝑦) = 𝐵) → 𝑥 = 𝑦)) |
| 9 | oveq2 7427 | . . . 4 ⊢ (𝑥 = 𝑦 → (𝐴 ·s 𝑥) = (𝐴 ·s 𝑦)) | |
| 10 | 9 | eqeq1d 2767 | . . 3 ⊢ (𝑥 = 𝑦 → ((𝐴 ·s 𝑥) = 𝐵 ↔ (𝐴 ·s 𝑦) = 𝐵)) |
| 11 | 10 | rmo4 3695 | . 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 |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2146 ≠ wne 2960 ∀wral 3081 ∃*wrmo 3370 (class class class)co 7419 No csur 27857 0s c0s 28051 ·s cmuls 28352 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-rep 5240 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-tp 4596 df-op 4598 df-ot 4600 df-uni 4875 df-int 4915 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-se 5617 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7376 df-ov 7422 df-oprab 7423 df-mpo 7424 df-1st 7992 df-2nd 7993 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-1o 8459 df-2o 8460 df-nadd 8658 df-no 27860 df-lts 27861 df-bday 27862 df-les 27962 df-slts 28004 df-cuts 28006 df-0s 28053 df-made 28073 df-old 28074 df-left 28076 df-right 28077 df-norec 28184 df-norec2 28195 df-adds 28206 df-negs 28267 df-subs 28268 df-muls 28353 |
| This theorem is used by: noreceuw 28437 |
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