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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 28043 | . 2 ⊢ bday:No–onto→On | |
| 2 | fofun 6802 | . 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 6365 Fun wfun 6537 –onto→wfo 6541 Nocsur 28006 bdaycbday 28008 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-pow 5327 ax-pr 5391 ax-un 7755 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 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-ss 3897 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 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 6371 df-fun 6545 df-fn 6546 df-f 6547 df-fo 6549 df-1o 8484 df-no 28009 df-bday 28011 |
| This theorem is used by: nobdaymin 28148 nocvxminlem 28149 noeta2 28156 etaslts2 28189 cutbdaybnd2lim 28192 madebdayim 28283 bdayiun 28310 lrrecfr 28338 addbdaylem 28412 negbdaylem 28451 oncutlt 28659 oniso 28666 bdayons 28671 bdayn0sf1o 28765 oldfib 28772 |
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