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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 27613 | . 2 ⊢ (𝐴 ∈ No ↔ ∃𝑥 ∈ On 𝐴:𝑥⟶{1o, 2o}) | |
| 2 | ffun 6665 | . . 3 ⊢ (𝐴:𝑥⟶{1o, 2o} → Fun 𝐴) | |
| 3 | 2 | rexlimivw 3133 | . 2 ⊢ (∃𝑥 ∈ On 𝐴:𝑥⟶{1o, 2o} → Fun 𝐴) |
| 4 | 1, 3 | sylbi 217 | 1 ⊢ (𝐴 ∈ No → Fun 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2113 ∃wrex 3060 {cpr 4582 Oncon0 6317 Fun wfun 6486 ⟶wf 6488 1oc1o 8390 2oc2o 8391 No csur 27607 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-fun 6494 df-fn 6495 df-f 6496 df-no 27610 |
| This theorem is referenced by: nofnbday 27620 elno2 27622 nofv 27625 ltsres 27630 nosepon 27633 noextend 27634 noextendseq 27635 noextenddif 27636 noextendlt 27637 noextendgt 27638 nolesgn2ores 27640 nogesgn1ores 27642 nosepssdm 27654 nolt02olem 27662 nolt02o 27663 nogt01o 27664 nosupno 27671 nosupres 27675 nosupbnd1lem5 27680 nosupbnd1 27682 nosupbnd2lem1 27683 nosupbnd2 27684 noinfno 27686 noinfres 27690 noinfbnd1lem5 27695 noinfbnd1 27697 noinfbnd2lem1 27698 noinfbnd2 27699 noetasuplem2 27702 noetasuplem3 27703 noetasuplem4 27704 noetainflem2 27706 noetainflem4 27708 |
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