Theorem nofnbday 27712

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

Step	Hyp	Ref	Expression
1		nofun 27709	. 2 ⊢ (𝐴 ∈ No → Fun 𝐴)
2		bdayval 27708	. . 3 ⊢ (𝐴 ∈ No → ( bday ‘𝐴) = dom 𝐴)
3	2	eqcomd 2741	. 2 ⊢ (𝐴 ∈ No → dom 𝐴 = ( bday ‘𝐴))
4		df-fn 6566	. 2 ⊢ (𝐴 Fn ( bday ‘𝐴) ↔ (Fun 𝐴 ∧ dom 𝐴 = ( bday ‘𝐴)))
5	1, 3, 4	sylanbrc 583	1 ⊢ (𝐴 ∈ No → 𝐴 Fn ( bday ‘𝐴))

Syntax hints:   → wi 4   = wceq 1537   ∈ wcel 2106  dom cdm 5689  Fun wfun 6557   Fn wfn 6558  ‘cfv 6563   No csur 27699   bday cbday 27701

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1908  ax-6 1965  ax-7 2005  ax-8 2108  ax-9 2116  ax-10 2139  ax-11 2155  ax-12 2175  ax-ext 2706  ax-sep 5302  ax-nul 5312  ax-pow 5371  ax-pr 5438  ax-un 7754

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1540  df-fal 1550  df-ex 1777  df-nf 1781  df-sb 2063  df-mo 2538  df-eu 2567  df-clab 2713  df-cleq 2727  df-clel 2814  df-nfc 2890  df-ral 3060  df-rex 3069  df-rab 3434  df-v 3480  df-dif 3966  df-un 3968  df-in 3970  df-ss 3980  df-nul 4340  df-if 4532  df-pw 4607  df-sn 4632  df-pr 4634  df-op 4638  df-uni 4913  df-br 5149  df-opab 5211  df-mpt 5232  df-id 5583  df-xp 5695  df-rel 5696  df-cnv 5697  df-co 5698  df-dm 5699  df-rn 5700  df-iota 6516  df-fun 6565  df-fn 6566  df-f 6567  df-fv 6571  df-no 27702  df-bday 27704

This theorem is referenced by:  nodenselem8  27751