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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 27722 | . 2 ⊢ bday : No –onto→On | |
| 2 | fofun 6821 | . 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 6384 Fun wfun 6555 –onto→wfo 6559 No csur 27684 bday cbday 27686 | 
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2708 ax-sep 5296 ax-nul 5306 ax-pow 5365 ax-pr 5432 ax-un 7755 | 
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2892 df-ne 2941 df-ral 3062 df-rex 3071 df-rab 3437 df-v 3482 df-dif 3954 df-un 3956 df-in 3958 df-ss 3968 df-nul 4334 df-if 4526 df-pw 4602 df-sn 4627 df-pr 4629 df-op 4633 df-uni 4908 df-br 5144 df-opab 5206 df-mpt 5226 df-id 5578 df-xp 5691 df-rel 5692 df-cnv 5693 df-co 5694 df-dm 5695 df-rn 5696 df-suc 6390 df-fun 6563 df-fn 6564 df-f 6565 df-fo 6567 df-1o 8506 df-no 27687 df-bday 27689 | 
| This theorem is referenced by: nocvxminlem 27822 nocvxmin 27823 etasslt2 27859 scutbdaybnd2lim 27862 madebdayim 27926 lrrecfr 27976 addsbdaylem 28049 negsbdaylem 28088 | 
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