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Theorem bdayfn 27741
Description: The birthday function is a function over No . (Contributed by Scott Fenton, 30-Jun-2011.)
Assertion
Ref Expression
bdayfn bday Fn No

Proof of Theorem bdayfn
StepHypRef Expression
1 bdayfo 27641 . 2 bday : No onto→On
2 fofn 6754 . 2 ( bday : No onto→On → bday Fn No )
31, 2ax-mp 5 1 bday Fn No
Colors of variables: wff setvar class
Syntax hints:  Oncon0 6323   Fn wfn 6493  ontowfo 6496   No csur 27603   bday cbday 27605
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2708  ax-sep 5231  ax-pow 5307  ax-pr 5375  ax-un 7689
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  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 3062  df-rab 3390  df-v 3431  df-dif 3892  df-un 3894  df-in 3896  df-ss 3906  df-nul 4274  df-if 4467  df-pw 4543  df-sn 4568  df-pr 4570  df-op 4574  df-uni 4851  df-br 5086  df-opab 5148  df-mpt 5167  df-id 5526  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-rn 5642  df-suc 6329  df-fun 6500  df-fn 6501  df-f 6502  df-fo 6504  df-1o 8405  df-no 27606  df-bday 27608
This theorem is referenced by:  nobdaymin  27745  eqcuts2  27778  cutsun12  27782  cutbdaybnd  27787  cutbdaybnd2  27788  cutbdaylt  27790  bday1  27806  cuteq0  27807  madebdaylemlrcut  27891  sltsbday  27909  cofcut1  27912  cofcutr  27916  lrrecfr  27935  oniso  28263  bdayons  28268  n0bday  28344  bdayn0p1  28361  bdaypw2n0bndlem  28455
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