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| Mirrors > Home > MPE Home > Th. List > bdayfn | Structured version Visualization version GIF version | ||
| Description: The birthday function is a function over No . (Contributed by Scott Fenton, 30-Jun-2011.) |
| Ref | Expression |
|---|---|
| bdayfn | ⊢ bday Fn No |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bdayfo 27850 | . 2 ⊢ bday : No –onto→On | |
| 2 | fofn 6794 | . 2 ⊢ ( bday : No –onto→On → bday Fn No ) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ bday Fn No |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: Oncon0 6360 Fn wfn 6531 –onto→wfo 6534 No csur 27813 bday cbday 27815 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-pow 5336 ax-pr 5404 ax-un 7732 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-opab 5174 df-mpt 5193 df-id 5556 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-suc 6366 df-fun 6538 df-fn 6539 df-f 6540 df-fo 6542 df-1o 8449 df-no 27816 df-bday 27818 |
| This theorem is used by: bdaydm 27951 nobdaymin 27955 eqcuts2 27988 cutsun12 27992 cutbdaybnd 27997 cutbdaybnd2 27998 cutbdaylt 28000 bday1 28016 cuteq0 28017 madebdaylemlrcut 28101 sltsbday 28119 cofcut1 28122 cofcutr 28126 lrrecfr 28145 oniso 28473 bdayons 28478 n0bday 28554 bdayn0p1 28571 bdaypw2n0bndlem 28665 |
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