| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > nofun | Structured version Visualization version GIF version | ||
| Description: A surreal is a function. (Contributed by Scott Fenton, 16-Jun-2011.) |
| Ref | Expression |
|---|---|
| nofun | ⊢ (𝐴 ∈ No → Fun 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elno 27847 | . 2 ⊢ (𝐴 ∈ No ↔ ∃𝑥 ∈ On 𝐴:𝑥⟶{1o, 2o}) | |
| 2 | ffun 6715 | . . 3 ⊢ (𝐴:𝑥⟶{1o, 2o} → Fun 𝐴) | |
| 3 | 2 | rexlimivw 3165 | . 2 ⊢ (∃𝑥 ∈ On 𝐴:𝑥⟶{1o, 2o} → Fun 𝐴) |
| 4 | 1, 3 | sylbi 220 | 1 ⊢ (𝐴 ∈ No → Fun 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2146 ∃wrex 3092 {cpr 4596 Oncon0 6367 Fun wfun 6537 ⟶wf 6539 1oc1o 8455 2oc2o 8456 No csur 27841 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-ext 2738 ax-sep 5262 ax-pow 5341 ax-pr 5409 ax-un 7745 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2745 df-cleq 2758 df-clel 2841 df-ral 3083 df-rex 3093 df-rab 3420 df-v 3460 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-br 5115 df-opab 5179 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-fun 6545 df-fn 6546 df-f 6547 df-no 27844 |
| This theorem is used by: nofnbday 27853 elno2 27855 nofv 27858 ltsres 27863 nosepon 27866 noextend 27867 noextendseq 27868 noextenddif 27869 noextendlt 27870 noextendgt 27871 nolesgn2ores 27873 nogesgn1ores 27875 nosepssdm 27887 nolt02olem 27895 nolt02o 27896 nogt01o 27897 nosupno 27904 nosupres 27908 nosupbnd1lem5 27913 nosupbnd1 27915 nosupbnd2lem1 27916 nosupbnd2 27917 noinfno 27919 noinfres 27923 noinfbnd1lem5 27928 noinfbnd1 27930 noinfbnd2lem1 27931 noinfbnd2 27932 noetasuplem2 27935 noetasuplem3 27936 noetasuplem4 27937 noetainflem2 27939 noetainflem4 27941 |
| Copyright terms: Public domain | W3C validator |