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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 27914 | . 2 ⊢ bday : No –onto→On | |
| 2 | fofun 6791 | . 2 ⊢ ( bday : No –onto→On → Fun bday ) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ Fun bday |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: Oncon0 6357 Fun wfun 6527 –onto→wfo 6531 No csur 27877 bday cbday 27879 |
| 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 7737 |
| 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-ne 2956 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-suc 6363 df-fun 6535 df-fn 6536 df-f 6537 df-fo 6539 df-1o 8456 df-no 27880 df-bday 27882 |
| This theorem is used by: nobdaymin 28019 nocvxminlem 28020 etaslts2 28060 cutbdaybnd2lim 28063 madebdayim 28154 bdayiun 28181 lrrecfr 28209 addbdaylem 28283 negbdaylem 28322 oncutlt 28530 oniso 28537 bdayons 28542 bdayn0sf1o 28636 oldfib 28643 |
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