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Mirrors > Home > MPE Home > Th. List > Mathboxes > df-0s | Structured version Visualization version GIF version |
Description: Define surreal zero. This is the simplest cut of surreal number sets. Definition from [Conway] p. 17. (Contributed by Scott Fenton, 7-Aug-2024.) |
Ref | Expression |
---|---|
df-0s | ⊢ 0s = (∅ |s ∅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | c0s 34016 | . 2 class 0s | |
2 | c0 4256 | . . 3 class ∅ | |
3 | cscut 33977 | . . 3 class |s | |
4 | 2, 2, 3 | co 7275 | . 2 class (∅ |s ∅) |
5 | 1, 4 | wceq 1539 | 1 wff 0s = (∅ |s ∅) |
Colors of variables: wff setvar class |
This definition is referenced by: 0sno 34020 bday0s 34022 0slt1s 34023 bday0b 34024 made0 34057 negs0s 34124 |
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