Theorem bdayrn 28014

Description: The birthday function's range is On. (Contributed by Scott Fenton, 14-Jun-2011.)

Assertion

Ref	Expression
bdayrn	⊢ ran bday = On

Proof of Theorem bdayrn

Step	Hyp	Ref	Expression
1		bdayfo 27911	. 2 ⊢ bday : No –onto→On
2		forn 6796	. 2 ⊢ ( bday : No –onto→On → ran bday = On)
3	1, 2	ax-mp 5	1 ⊢ ran bday = On

This proof depends on syntax axioms:   = wceq 1570  ran crn 5660  Oncon0 6361  –onto→wfo 6535   No csur 27874   bday cbday 27876

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 2215  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-nf 1817  df-sb 2100  df-mo 2566  df-eu 2596  df-clab 2741  df-cleq 2754  df-clel 2837  df-nfc 2911  df-ne 2958  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-mpt 5191  df-id 5554  df-xp 5665  df-rel 5666  df-cnv 5667  df-co 5668  df-dm 5669  df-rn 5670  df-suc 6367  df-fun 6539  df-fn 6540  df-f 6541  df-fo 6543  df-1o 8458  df-no 27877  df-bday 27879

This theorem is used by:  nobdaymin  28016  nocvxminlem  28017  etaslts2  28057  cutbdaybnd2lim  28060  bday0  28074  lrrecfr  28206  oniso  28534  bdayons  28539