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| 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 27788 | . 2 ⊢ (𝐴 ∈ No ↔ ∃𝑥 ∈ On 𝐴:𝑥⟶{1o, 2o}) | |
| 2 | ffun 6710 | . . 3 ⊢ (𝐴:𝑥⟶{1o, 2o} → Fun 𝐴) | |
| 3 | 2 | rexlimivw 3162 | . 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 |
| Syntax hints: → wi 4 ∈ wcel 2143 ∃wrex 3089 {cpr 4592 Oncon0 6362 Fun wfun 6532 ⟶wf 6534 1oc1o 8447 2oc2o 8448 No csur 27782 |
| This theorem was proved from 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-ext 2735 ax-sep 5258 ax-pow 5338 ax-pr 5406 ax-un 7734 |
| This theorem 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-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-br 5111 df-opab 5175 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-fun 6540 df-fn 6541 df-f 6542 df-no 27785 |
| This theorem is referenced by: nofnbday 27794 elno2 27796 nofv 27799 ltsres 27804 nosepon 27807 noextend 27808 noextendseq 27809 noextenddif 27810 noextendlt 27811 noextendgt 27812 nolesgn2ores 27814 nogesgn1ores 27816 nosepssdm 27828 nolt02olem 27836 nolt02o 27837 nogt01o 27838 nosupno 27845 nosupres 27849 nosupbnd1lem5 27854 nosupbnd1 27856 nosupbnd2lem1 27857 nosupbnd2 27858 noinfno 27860 noinfres 27864 noinfbnd1lem5 27869 noinfbnd1 27871 noinfbnd2lem1 27872 noinfbnd2 27873 noetasuplem2 27876 noetasuplem3 27877 noetasuplem4 27878 noetainflem2 27880 noetainflem4 27882 |
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