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| Mirrors > Home > MPE Home > Th. List > norn | Structured version Visualization version GIF version | ||
| Description: The range of a surreal is a subset of the surreal signs. (Contributed by Scott Fenton, 16-Jun-2011.) |
| Ref | Expression |
|---|---|
| norn | ⊢ (𝐴 ∈ No → ran 𝐴 ⊆ {1o, 2o}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elno 27878 | . 2 ⊢ (𝐴 ∈ No ↔ ∃𝑥 ∈ On 𝐴:𝑥⟶{1o, 2o}) | |
| 2 | frn 6714 | . . 3 ⊢ (𝐴:𝑥⟶{1o, 2o} → ran 𝐴 ⊆ {1o, 2o}) | |
| 3 | 2 | rexlimivw 3161 | . 2 ⊢ (∃𝑥 ∈ On 𝐴:𝑥⟶{1o, 2o} → ran 𝐴 ⊆ {1o, 2o}) |
| 4 | 1, 3 | sylbi 220 | 1 ⊢ (𝐴 ∈ No → ran 𝐴 ⊆ {1o, 2o}) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2145 ∃wrex 3088 ⊆ wss 3902 {cpr 4589 ran crn 5660 Oncon0 6361 ⟶wf 6533 1oc1o 8451 2oc2o 8452 No csur 27872 |
| 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 2147 ax-9 2155 ax-ext 2734 ax-sep 5255 ax-pow 5334 ax-pr 5402 ax-un 7739 |
| 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 2741 df-cleq 2754 df-clel 2837 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-opab 5172 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-fun 6539 df-fn 6540 df-f 6541 df-no 27875 |
| This theorem is used by: elno2 27886 nofv 27889 ltsres 27894 noextend 27898 noextendseq 27899 nosepssdm 27918 nodenselem8 27923 nolt02olem 27926 nosupno 27935 noinfno 27950 |
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