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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 27659 | . . 3 ⊢ bday : No –onto→On | |
| 2 | fof 6739 | . . 3 ⊢ ( bday : No –onto→On → bday : No ⟶On) | |
| 3 | 1, 2 | ax-mp 5 | . 2 ⊢ bday : No ⟶On |
| 4 | 3 | fdmi 6666 | 1 ⊢ dom bday = No |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1547 dom cdm 5618 Oncon0 6310 ⟶wf 6481 –onto→wfo 6483 No csur 27621 bday cbday 27623 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-pow 5294 ax-pr 5362 ax-un 7678 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-br 5073 df-opab 5135 df-mpt 5154 df-id 5513 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-suc 6316 df-fun 6487 df-fn 6488 df-f 6489 df-fo 6491 df-1o 8395 df-no 27624 df-bday 27626 |
| This theorem is referenced by: nobdaymin 27763 nocvxminlem 27764 bday0 27821 leftval 27859 rightval 27860 madebdayim 27898 lrold 27907 addbdaylem 28027 negbdaylem 28066 oncutlt 28274 oniso 28281 bdayons 28286 bdayn0sf1o 28380 |
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