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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 27806 | . 2 ⊢ bday : No –onto→On | |
| 2 | fofun 6794 | . 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 6361 Fun wfun 6531 –onto→wfo 6535 No csur 27769 bday cbday 27771 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-pow 5337 ax-pr 5405 ax-un 7733 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-mpt 5197 df-id 5557 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-suc 6367 df-fun 6539 df-fn 6540 df-f 6541 df-fo 6543 df-1o 8452 df-no 27772 df-bday 27774 |
| This theorem is referenced by: nobdaymin 27911 nocvxminlem 27912 etaslts2 27952 cutbdaybnd2lim 27955 madebdayim 28046 bdayiun 28073 lrrecfr 28101 addbdaylem 28175 negbdaylem 28214 oncutlt 28422 oniso 28429 bdayons 28434 bdayn0sf1o 28528 oldfib 28535 |
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