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

Theorem nofnbday 27920
Description: A surreal is a function over its birthday. (Contributed by Scott Fenton, 16-Jun-2011.)
Assertion
Ref Expression
nofnbday (𝐴 No 𝐴 Fn ( bday 𝐴))

Proof of Theorem nofnbday
StepHypRef Expression
1 nofun 27917 . 2 (𝐴 No → Fun 𝐴)
2 bdayval 27916 . . 3 (𝐴 No → ( bday 𝐴) = dom 𝐴)
32eqcomd 2766 . 2 (𝐴 No → dom 𝐴 = ( bday 𝐴))
4 df-fn 6538 . 2 (𝐴 Fn ( bday 𝐴) ↔ (Fun 𝐴 ∧ dom 𝐴 = ( bday 𝐴)))
51, 3, 4sylanbrc 595 1 (𝐴 No 𝐴 Fn ( bday 𝐴))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4   = wceq 1570  wcel 2145  dom cdm 5655  Fun wfun 6529   Fn wfn 6530  cfv 6535   No csur 27908   bday cbday 27910
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-sep 5251  ax-pow 5330  ax-pr 5398  ax-un 7742
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-nf 1817  df-sb 2100  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-pw 4559  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-br 5104  df-opab 5168  df-mpt 5187  df-id 5550  df-xp 5661  df-rel 5662  df-cnv 5663  df-co 5664  df-dm 5665  df-rn 5666  df-iota 6491  df-fun 6537  df-fn 6538  df-f 6539  df-fv 6543  df-no 27911  df-bday 27913
This theorem is used by:  nodenselem8  27959
  Copyright terms: Public domain W3C validator