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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 27627 | . 2 ⊢ (𝐴 ∈ No ↔ ∃𝑥 ∈ On 𝐴:𝑥⟶{1o, 2o}) | |
| 2 | ffun 6658 | . . 3 ⊢ (𝐴:𝑥⟶{1o, 2o} → Fun 𝐴) | |
| 3 | 2 | rexlimivw 3136 | . 2 ⊢ (∃𝑥 ∈ On 𝐴:𝑥⟶{1o, 2o} → Fun 𝐴) |
| 4 | 1, 3 | sylbi 218 | 1 ⊢ (𝐴 ∈ No → Fun 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2119 ∃wrex 3063 {cpr 4557 Oncon0 6310 Fun wfun 6479 ⟶wf 6481 1oc1o 8388 2oc2o 8389 No csur 27621 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2711 ax-sep 5218 ax-pow 5294 ax-pr 5362 ax-un 7678 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-sb 2074 df-clab 2718 df-cleq 2731 df-clel 2814 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-br 5073 df-opab 5135 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-fun 6487 df-fn 6488 df-f 6489 df-no 27624 |
| This theorem is referenced by: nofnbday 27634 elno2 27636 nofv 27639 ltsres 27644 nosepon 27647 noextend 27648 noextendseq 27649 noextenddif 27650 noextendlt 27651 noextendgt 27652 nolesgn2ores 27654 nogesgn1ores 27656 nosepssdm 27668 nolt02olem 27676 nolt02o 27677 nogt01o 27678 nosupno 27685 nosupres 27689 nosupbnd1lem5 27694 nosupbnd1 27696 nosupbnd2lem1 27697 nosupbnd2 27698 noinfno 27700 noinfres 27704 noinfbnd1lem5 27709 noinfbnd1 27711 noinfbnd2lem1 27712 noinfbnd2 27713 noetasuplem2 27716 noetasuplem3 27717 noetasuplem4 27718 noetainflem2 27720 noetainflem4 27722 |
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