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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 27609 | . 2 ⊢ (𝐴 ∈ No ↔ ∃𝑥 ∈ On 𝐴:𝑥⟶{1o, 2o}) | |
| 2 | ffun 6671 | . . 3 ⊢ (𝐴:𝑥⟶{1o, 2o} → Fun 𝐴) | |
| 3 | 2 | rexlimivw 3134 | . 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 2114 ∃wrex 3061 {cpr 4569 Oncon0 6323 Fun wfun 6492 ⟶wf 6494 1oc1o 8398 2oc2o 8399 No csur 27603 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2708 ax-sep 5231 ax-pow 5307 ax-pr 5375 ax-un 7689 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-fun 6500 df-fn 6501 df-f 6502 df-no 27606 |
| This theorem is referenced by: nofnbday 27616 elno2 27618 nofv 27621 ltsres 27626 nosepon 27629 noextend 27630 noextendseq 27631 noextenddif 27632 noextendlt 27633 noextendgt 27634 nolesgn2ores 27636 nogesgn1ores 27638 nosepssdm 27650 nolt02olem 27658 nolt02o 27659 nogt01o 27660 nosupno 27667 nosupres 27671 nosupbnd1lem5 27676 nosupbnd1 27678 nosupbnd2lem1 27679 nosupbnd2 27680 noinfno 27682 noinfres 27686 noinfbnd1lem5 27691 noinfbnd1 27693 noinfbnd2lem1 27694 noinfbnd2 27695 noetasuplem2 27698 noetasuplem3 27699 noetasuplem4 27700 noetainflem2 27702 noetainflem4 27704 |
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