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| Mirrors > Home > MPE Home > Th. List > bdayfun | Structured version Visualization version GIF version | ||
| Description: The birthday function is a function. (Contributed by Scott Fenton, 14-Jun-2011.) |
| Ref | Expression |
|---|---|
| bdayfun | ⊢ Fun bday |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bdayfo 27795 | . 2 ⊢ bday : No –onto→On | |
| 2 | fofun 6783 | . 2 ⊢ ( bday : No –onto→On → Fun bday ) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ Fun bday |
| Colors of variables: wff setvar class |
| Syntax hints: Oncon0 6349 Fun wfun 6519 –onto→wfo 6523 No csur 27758 bday cbday 27760 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-sep 5250 ax-pow 5326 ax-pr 5394 ax-un 7722 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3080 df-rex 3090 df-rab 3418 df-v 3459 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-br 5105 df-opab 5167 df-mpt 5186 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-suc 6355 df-fun 6527 df-fn 6528 df-f 6529 df-fo 6531 df-1o 8441 df-no 27761 df-bday 27763 |
| This theorem is referenced by: nobdaymin 27900 nocvxminlem 27901 etaslts2 27941 cutbdaybnd2lim 27944 madebdayim 28035 bdayiun 28062 lrrecfr 28090 addbdaylem 28164 negbdaylem 28203 oncutlt 28411 oniso 28418 bdayons 28423 bdayn0sf1o 28517 oldfib 28524 |
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