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Theorem divsmo 28274
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 2784 . . . 4 (((𝐴 ·s 𝑥) = 𝐵 ∧ (𝐴 ·s 𝑦) = 𝐵) → (𝐴 ·s 𝑥) = (𝐴 ·s 𝑦))
2 simprl 780 . . . . 5 (((𝐴 No 𝐴 ≠ 0s ) ∧ (𝑥 No 𝑦 No )) → 𝑥 No )
3 simprr 782 . . . . 5 (((𝐴 No 𝐴 ≠ 0s ) ∧ (𝑥 No 𝑦 No )) → 𝑦 No )
4 simpll 776 . . . . 5 (((𝐴 No 𝐴 ≠ 0s ) ∧ (𝑥 No 𝑦 No )) → 𝐴 No )
5 simplr 778 . . . . 5 (((𝐴 No 𝐴 ≠ 0s ) ∧ (𝑥 No 𝑦 No )) → 𝐴 ≠ 0s )
62, 3, 4, 5mulscan1d 28270 . . . 4 (((𝐴 No 𝐴 ≠ 0s ) ∧ (𝑥 No 𝑦 No )) → ((𝐴 ·s 𝑥) = (𝐴 ·s 𝑦) ↔ 𝑥 = 𝑦))
71, 6imbitrid 246 . . 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 7404 . . . 4 (𝑥 = 𝑦 → (𝐴 ·s 𝑥) = (𝐴 ·s 𝑦))
109eqeq1d 2764 . . 3 (𝑥 = 𝑦 → ((𝐴 ·s 𝑥) = 𝐵 ↔ (𝐴 ·s 𝑦) = 𝐵))
1110rmo4 3693 . 2 (∃*𝑥 No (𝐴 ·s 𝑥) = 𝐵 ↔ ∀𝑥 No 𝑦 No (((𝐴 ·s 𝑥) = 𝐵 ∧ (𝐴 ·s 𝑦) = 𝐵) → 𝑥 = 𝑦))
128, 11sylibr 236 1 ((𝐴 No 𝐴 ≠ 0s ) → ∃*𝑥 No (𝐴 ·s 𝑥) = 𝐵)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 399   = wceq 1560  wcel 2142  wne 2957  wral 3076  ∃*wrmo 3366  (class class class)co 7396   No csur 27701   0s c0s 27895   ·s cmuls 28196
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1815  ax-4 1829  ax-5 1930  ax-6 1987  ax-7 2028  ax-8 2144  ax-9 2152  ax-10 2175  ax-11 2191  ax-12 2212  ax-ext 2734  ax-rep 5227  ax-sep 5246  ax-nul 5256  ax-pow 5322  ax-pr 5390  ax-un 7718
This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3or 1099  df-3an 1100  df-tru 1563  df-fal 1573  df-ex 1800  df-nf 1804  df-sb 2091  df-mo 2566  df-eu 2596  df-clab 2741  df-cleq 2754  df-clel 2837  df-nfc 2911  df-ne 2958  df-ral 3077  df-rex 3087  df-rmo 3367  df-reu 3368  df-rab 3415  df-v 3456  df-sbc 3745  df-csb 3853  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-pss 3924  df-nul 4286  df-if 4481  df-pw 4557  df-sn 4583  df-pr 4585  df-tp 4587  df-op 4589  df-ot 4591  df-uni 4866  df-int 4906  df-iun 4951  df-br 5101  df-opab 5163  df-mpt 5182  df-tr 5208  df-id 5542  df-eprel 5547  df-po 5555  df-so 5556  df-fr 5600  df-se 5601  df-we 5602  df-xp 5653  df-rel 5654  df-cnv 5655  df-co 5656  df-dm 5657  df-rn 5658  df-res 5659  df-ima 5660  df-pred 6288  df-ord 6349  df-on 6350  df-suc 6352  df-iota 6477  df-fun 6523  df-fn 6524  df-f 6525  df-f1 6526  df-fo 6527  df-f1o 6528  df-fv 6529  df-riota 7353  df-ov 7399  df-oprab 7400  df-mpo 7401  df-1st 7970  df-2nd 7971  df-frecs 8262  df-wrecs 8293  df-recs 8342  df-1o 8437  df-2o 8438  df-nadd 8636  df-no 27704  df-lts 27705  df-bday 27706  df-les 27806  df-slts 27848  df-cuts 27850  df-0s 27897  df-made 27917  df-old 27918  df-left 27920  df-right 27921  df-norec 28028  df-norec2 28039  df-adds 28050  df-negs 28111  df-subs 28112  df-muls 28197
This theorem is referenced by:  noreceuw  28281
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