MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  cutsfo Structured version   Visualization version   GIF version

Theorem cutsfo 27901
Description: The surreal cut function is onto. (Contributed by Scott Fenton, 23-Aug-2024.)
Assertion
Ref Expression
cutsfo |s : <<s –onto No

Proof of Theorem cutsfo
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 cutsf 27788 . 2 |s : <<s ⟶ No
2 lltr 27858 . . . . 5 ( L ‘𝑥) <<s ( R ‘𝑥)
3 df-br 5099 . . . . 5 (( L ‘𝑥) <<s ( R ‘𝑥) ↔ ⟨( L ‘𝑥), ( R ‘𝑥)⟩ ∈ <<s )
42, 3mpbi 230 . . . 4 ⟨( L ‘𝑥), ( R ‘𝑥)⟩ ∈ <<s
5 lrcut 27900 . . . . 5 (𝑥 No → (( L ‘𝑥) |s ( R ‘𝑥)) = 𝑥)
65eqcomd 2742 . . . 4 (𝑥 No 𝑥 = (( L ‘𝑥) |s ( R ‘𝑥)))
7 fveq2 6834 . . . . . 6 (𝑦 = ⟨( L ‘𝑥), ( R ‘𝑥)⟩ → ( |s ‘𝑦) = ( |s ‘⟨( L ‘𝑥), ( R ‘𝑥)⟩))
8 df-ov 7361 . . . . . 6 (( L ‘𝑥) |s ( R ‘𝑥)) = ( |s ‘⟨( L ‘𝑥), ( R ‘𝑥)⟩)
97, 8eqtr4di 2789 . . . . 5 (𝑦 = ⟨( L ‘𝑥), ( R ‘𝑥)⟩ → ( |s ‘𝑦) = (( L ‘𝑥) |s ( R ‘𝑥)))
109rspceeqv 3599 . . . 4 ((⟨( L ‘𝑥), ( R ‘𝑥)⟩ ∈ <<s ∧ 𝑥 = (( L ‘𝑥) |s ( R ‘𝑥))) → ∃𝑦 ∈ <<s 𝑥 = ( |s ‘𝑦))
114, 6, 10sylancr 587 . . 3 (𝑥 No → ∃𝑦 ∈ <<s 𝑥 = ( |s ‘𝑦))
1211rgen 3053 . 2 𝑥 No 𝑦 ∈ <<s 𝑥 = ( |s ‘𝑦)
13 dffo3 7047 . 2 ( |s : <<s –onto No ↔ ( |s : <<s ⟶ No ∧ ∀𝑥 No 𝑦 ∈ <<s 𝑥 = ( |s ‘𝑦)))
141, 12, 13mpbir2an 711 1 |s : <<s –onto No
Colors of variables: wff setvar class
Syntax hints:   = wceq 1541  wcel 2113  wral 3051  wrex 3060  cop 4586   class class class wbr 5098  wf 6488  ontowfo 6490  cfv 6492  (class class class)co 7358   No csur 27607   <<s cslts 27753   |s ccuts 27755   L cleft 27821   R cright 27822
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2184  ax-ext 2708  ax-rep 5224  ax-sep 5241  ax-nul 5251  ax-pow 5310  ax-pr 5377  ax-un 7680
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3061  df-rmo 3350  df-reu 3351  df-rab 3400  df-v 3442  df-sbc 3741  df-csb 3850  df-dif 3904  df-un 3906  df-in 3908  df-ss 3918  df-pss 3921  df-nul 4286  df-if 4480  df-pw 4556  df-sn 4581  df-pr 4583  df-tp 4585  df-op 4587  df-uni 4864  df-int 4903  df-iun 4948  df-br 5099  df-opab 5161  df-mpt 5180  df-tr 5206  df-id 5519  df-eprel 5524  df-po 5532  df-so 5533  df-fr 5577  df-we 5579  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-rn 5635  df-res 5636  df-ima 5637  df-pred 6259  df-ord 6320  df-on 6321  df-suc 6323  df-iota 6448  df-fun 6494  df-fn 6495  df-f 6496  df-f1 6497  df-fo 6498  df-f1o 6499  df-fv 6500  df-riota 7315  df-ov 7361  df-oprab 7362  df-mpo 7363  df-2nd 7934  df-frecs 8223  df-wrecs 8254  df-recs 8303  df-1o 8397  df-2o 8398  df-no 27610  df-lts 27611  df-bday 27612  df-slts 27754  df-cuts 27756  df-made 27823  df-old 27824  df-left 27826  df-right 27827
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator