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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 27658 | . . 3 ⊢ bday : No –onto→On | |
| 2 | fof 6747 | . . 3 ⊢ ( bday : No –onto→On → bday : No ⟶On) | |
| 3 | 1, 2 | ax-mp 5 | . 2 ⊢ bday : No ⟶On |
| 4 | 3 | fdmi 6674 | 1 ⊢ dom bday = No |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 dom cdm 5625 Oncon0 6318 ⟶wf 6489 –onto→wfo 6491 No csur 27620 bday cbday 27622 |
| 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 5232 ax-pow 5303 ax-pr 5371 ax-un 7683 |
| 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 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-suc 6324 df-fun 6495 df-fn 6496 df-f 6497 df-fo 6499 df-1o 8399 df-no 27623 df-bday 27625 |
| This theorem is referenced by: nobdaymin 27762 nocvxminlem 27763 bday0 27820 leftval 27858 rightval 27859 madebdayim 27897 lrold 27906 addbdaylem 28026 negbdaylem 28065 oncutlt 28273 oniso 28280 bdayons 28285 bdayn0sf1o 28379 |
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