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

Theorem norn 27883
Description: The range of a surreal is a subset of the surreal signs. (Contributed by Scott Fenton, 16-Jun-2011.)
Assertion
Ref Expression
norn (𝐴 No → ran 𝐴 ⊆ {1o, 2o})

Proof of Theorem norn
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 elno 27878 . 2 (𝐴 No ↔ ∃𝑥 ∈ On 𝐴:𝑥⟶{1o, 2o})
2 frn 6714 . . 3 (𝐴:𝑥⟶{1o, 2o} → ran 𝐴 ⊆ {1o, 2o})
32rexlimivw 3161 . 2 (∃𝑥 ∈ On 𝐴:𝑥⟶{1o, 2o} → ran 𝐴 ⊆ {1o, 2o})
41, 3sylbi 220 1 (𝐴 No → ran 𝐴 ⊆ {1o, 2o})
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wcel 2145  wrex 3088  wss 3902  {cpr 4589  ran crn 5660  Oncon0 6361  wf 6533  1oc1o 8451  2oc2o 8452   No csur 27872
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-ext 2734  ax-sep 5255  ax-pow 5334  ax-pr 5402  ax-un 7739
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2741  df-cleq 2754  df-clel 2837  df-ral 3079  df-rex 3089  df-rab 3415  df-v 3455  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-nul 4283  df-if 4486  df-pw 4562  df-sn 4588  df-pr 4590  df-op 4594  df-uni 4871  df-br 5108  df-opab 5172  df-xp 5665  df-rel 5666  df-cnv 5667  df-co 5668  df-dm 5669  df-rn 5670  df-fun 6539  df-fn 6540  df-f 6541  df-no 27875
This theorem is used by:  elno2  27886  nofv  27889  ltsres  27894  noextend  27898  noextendseq  27899  nosepssdm  27918  nodenselem8  27923  nolt02olem  27926  nosupno  27935  noinfno  27950
  Copyright terms: Public domain W3C validator