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Theorem divsmo 28450
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.)
Assertion
Ref Expression
divsmo ((𝐴 No 𝐴 ≠ 0s ) → ∃*𝑥 No (𝐴 ·s 𝑥) = 𝐵)
Distinct variable groups:   𝑥,𝐴   𝑥,𝐵

Proof of Theorem divsmo
Dummy variable 𝑦 is distinct from all other variables.
StepHypRef Expression
1 eqtr3 2782 . . . 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 )
62, 3, 4, 5mulscan1d 28446 . . . 4 (((𝐴 No 𝐴 ≠ 0s ) ∧ (𝑥 No 𝑦 No )) → ((𝐴 ·s 𝑥) = (𝐴 ·s 𝑦) ↔ 𝑥 = 𝑦))
71, 6imbitrid 247 . . 3 (((𝐴 No 𝐴 ≠ 0s ) ∧ (𝑥 No 𝑦 No )) → (((𝐴 ·s 𝑥) = 𝐵 ∧ (𝐴 ·s 𝑦) = 𝐵) → 𝑥 = 𝑦))
87ralrimivva 3205 . 2 ((𝐴 No 𝐴 ≠ 0s ) → ∀𝑥 No 𝑦 No (((𝐴 ·s 𝑥) = 𝐵 ∧ (𝐴 ·s 𝑦) = 𝐵) → 𝑥 = 𝑦))
9 oveq2 7422 . . . 4 (𝑥 = 𝑦 → (𝐴 ·s 𝑥) = (𝐴 ·s 𝑦))
109eqeq1d 2762 . . 3 (𝑥 = 𝑦 → ((𝐴 ·s 𝑥) = 𝐵 ↔ (𝐴 ·s 𝑦) = 𝐵))
1110rmo4 3688 . 2 (∃*𝑥 No (𝐴 ·s 𝑥) = 𝐵 ↔ ∀𝑥 No 𝑦 No (((𝐴 ·s 𝑥) = 𝐵 ∧ (𝐴 ·s 𝑦) = 𝐵) → 𝑥 = 𝑦))
128, 11sylibr 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 2145  wne 2955  wral 3076  ∃*wrmo 3364  (class class class)co 7414   No csur 27877   0s c0s 28071   ·s cmuls 28372
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 7737
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 6299  df-ord 6360  df-on 6361  df-suc 6363  df-iota 6489  df-fun 6535  df-fn 6536  df-f 6537  df-f1 6538  df-fo 6539  df-f1o 6540  df-fv 6541  df-riota 7371  df-ov 7417  df-oprab 7418  df-mpo 7419  df-1st 7987  df-2nd 7988  df-frecs 8281  df-wrecs 8312  df-recs 8361  df-1o 8456  df-2o 8457  df-nadd 8655  df-no 27880  df-lts 27881  df-bday 27882  df-les 27982  df-slts 28024  df-cuts 28026  df-0s 28073  df-made 28093  df-old 28094  df-left 28096  df-right 28097  df-norec 28204  df-norec2 28215  df-adds 28226  df-negs 28287  df-subs 28288  df-muls 28373
This theorem is used by:  noreceuw  28457
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