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| Mirrors > Home > MPE Home > Th. List > bdaydm | Structured version Visualization version GIF version | ||
| Description: The birthday function's domain is No . (Contributed by Scott Fenton, 14-Jun-2011.) |
| Ref | Expression |
|---|---|
| bdaydm | ⊢ dom bday = No |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bdayfo 27657 | . . 3 ⊢ bday : No –onto→On | |
| 2 | fof 6754 | . . 3 ⊢ ( bday : No –onto→On → bday : No ⟶On) | |
| 3 | 1, 2 | ax-mp 5 | . 2 ⊢ bday : No ⟶On |
| 4 | 3 | fdmi 6681 | 1 ⊢ dom bday = No |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 dom cdm 5632 Oncon0 6325 ⟶wf 6496 –onto→wfo 6498 No csur 27619 bday cbday 27621 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-pow 5312 ax-pr 5379 ax-un 7690 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5527 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-suc 6331 df-fun 6502 df-fn 6503 df-f 6504 df-fo 6506 df-1o 8407 df-no 27622 df-bday 27624 |
| This theorem is referenced by: nobdaymin 27761 nocvxminlem 27762 bday0 27819 leftval 27857 rightval 27858 madebdayim 27896 lrold 27905 addbdaylem 28025 negbdaylem 28064 oncutlt 28272 oniso 28279 bdayons 28284 bdayn0sf1o 28378 |
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