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| Mirrors > Home > MPE Home > Th. List > nofnbday | Structured version Visualization version GIF version | ||
| Description: A surreal is a function over its birthday. (Contributed by Scott Fenton, 16-Jun-2011.) |
| Ref | Expression |
|---|---|
| nofnbday | ⊢ (𝐴 ∈ No → 𝐴 Fn ( bday ‘𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nofun 27822 | . 2 ⊢ (𝐴 ∈ No → Fun 𝐴) | |
| 2 | bdayval 27821 | . . 3 ⊢ (𝐴 ∈ No → ( bday ‘𝐴) = dom 𝐴) | |
| 3 | 2 | eqcomd 2769 | . 2 ⊢ (𝐴 ∈ No → dom 𝐴 = ( bday ‘𝐴)) |
| 4 | df-fn 6539 | . 2 ⊢ (𝐴 Fn ( bday ‘𝐴) ↔ (Fun 𝐴 ∧ dom 𝐴 = ( bday ‘𝐴))) | |
| 5 | 1, 3, 4 | sylanbrc 594 | 1 ⊢ (𝐴 ∈ No → 𝐴 Fn ( bday ‘𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2143 dom cdm 5661 Fun wfun 6530 Fn wfn 6531 ‘cfv 6536 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-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-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-fv 6544 df-no 27816 df-bday 27818 |
| This theorem is used by: nodenselem8 27864 |
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