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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 27643 | . . 3 ⊢ bday : No –onto→On | |
| 2 | fof 6744 | . . 3 ⊢ ( bday : No –onto→On → bday : No ⟶On) | |
| 3 | 1, 2 | ax-mp 5 | . 2 ⊢ bday : No ⟶On |
| 4 | 3 | fdmi 6671 | 1 ⊢ dom bday = No |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 dom cdm 5622 Oncon0 6315 ⟶wf 6486 –onto→wfo 6488 No csur 27605 bday cbday 27607 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-br 5097 df-opab 5159 df-mpt 5178 df-id 5517 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-suc 6321 df-fun 6492 df-fn 6493 df-f 6494 df-fo 6496 df-1o 8395 df-no 27608 df-bday 27610 |
| This theorem is referenced by: nobdaymin 27743 nocvxminlem 27744 bday0s 27799 leftval 27831 rightval 27832 madebdayim 27860 lrold 27869 addsbdaylem 27986 negsbdaylem 28025 onscutlt 28232 onsiso 28236 bdayon 28240 bdayn0sf1o 28328 |
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