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| Mirrors > Home > MPE Home > Th. List > Mathboxes > 0fno | Structured version Visualization version GIF version | ||
| Description: Ordinal zero maps to a surreal number. (Contributed by RP, 21-Sep-2023.) |
| Ref | Expression |
|---|---|
| 0fno | ⊢ ∅ ∈ No |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0xp 5750 | . 2 ⊢ (∅ × {2o}) = ∅ | |
| 2 | 0elon 6417 | . . 3 ⊢ ∅ ∈ On | |
| 3 | 2 | onnoxpi 44419 | . 2 ⊢ (∅ × {2o}) ∈ No |
| 4 | 1, 3 | eqeltrri 2858 | 1 ⊢ ∅ ∈ No |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 ∅c0 4279 {csn 4584 × cxp 5649 2oc2o 8463 No csur 27990 |
| 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-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7749 |
| 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-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-ord 6364 df-on 6365 df-suc 6367 df-fun 6539 df-fn 6540 df-f 6541 df-1o 8469 df-2o 8470 df-no 27993 |
| This theorem is used by: (None) |
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