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Theorem lrcut 34010
Description: A surreal is equal to the cut of its left and right sets. (Contributed by Scott Fenton, 19-Aug-2024.)
Assertion
Ref Expression
lrcut (𝑋 No → (( L ‘𝑋) |s ( R ‘𝑋)) = 𝑋)

Proof of Theorem lrcut
Dummy variables 𝑏 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 bdayelon 33898 . . . . 5 ( bday 𝑋) ∈ On
21oneli 6359 . . . 4 (𝑏 ∈ ( bday 𝑋) → 𝑏 ∈ On)
3 madebday 34007 . . . . 5 ((𝑏 ∈ On ∧ 𝑦 No ) → (𝑦 ∈ ( M ‘𝑏) ↔ ( bday 𝑦) ⊆ 𝑏))
43biimprd 247 . . . 4 ((𝑏 ∈ On ∧ 𝑦 No ) → (( bday 𝑦) ⊆ 𝑏𝑦 ∈ ( M ‘𝑏)))
52, 4sylan 579 . . 3 ((𝑏 ∈ ( bday 𝑋) ∧ 𝑦 No ) → (( bday 𝑦) ⊆ 𝑏𝑦 ∈ ( M ‘𝑏)))
65rgen2 3126 . 2 𝑏 ∈ ( bday 𝑋)∀𝑦 No (( bday 𝑦) ⊆ 𝑏𝑦 ∈ ( M ‘𝑏))
7 madebdaylemlrcut 34006 . 2 ((∀𝑏 ∈ ( bday 𝑋)∀𝑦 No (( bday 𝑦) ⊆ 𝑏𝑦 ∈ ( M ‘𝑏)) ∧ 𝑋 No ) → (( L ‘𝑋) |s ( R ‘𝑋)) = 𝑋)
86, 7mpan 686 1 (𝑋 No → (( L ‘𝑋) |s ( R ‘𝑋)) = 𝑋)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1539  wcel 2108  wral 3063  wss 3883  Oncon0 6251  cfv 6418  (class class class)co 7255   No csur 33770   bday cbday 33772   |s cscut 33904   M cmade 33953   L cleft 33956   R cright 33957
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-rep 5205  ax-sep 5218  ax-nul 5225  ax-pow 5283  ax-pr 5347  ax-un 7566
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3or 1086  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ne 2943  df-ral 3068  df-rex 3069  df-reu 3070  df-rmo 3071  df-rab 3072  df-v 3424  df-sbc 3712  df-csb 3829  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-pss 3902  df-nul 4254  df-if 4457  df-pw 4532  df-sn 4559  df-pr 4561  df-tp 4563  df-op 4565  df-uni 4837  df-int 4877  df-iun 4923  df-br 5071  df-opab 5133  df-mpt 5154  df-tr 5188  df-id 5480  df-eprel 5486  df-po 5494  df-so 5495  df-fr 5535  df-we 5537  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-rn 5591  df-res 5592  df-ima 5593  df-pred 6191  df-ord 6254  df-on 6255  df-suc 6257  df-iota 6376  df-fun 6420  df-fn 6421  df-f 6422  df-f1 6423  df-fo 6424  df-f1o 6425  df-fv 6426  df-riota 7212  df-ov 7258  df-oprab 7259  df-mpo 7260  df-2nd 7805  df-frecs 8068  df-wrecs 8099  df-recs 8173  df-1o 8267  df-2o 8268  df-no 33773  df-slt 33774  df-bday 33775  df-sslt 33903  df-scut 33905  df-made 33958  df-old 33959  df-left 33961  df-right 33962
This theorem is referenced by:  scutfo  34011  sltn0  34012  sltlpss  34014  addsid1  34054
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