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Definition df-0s 33659
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.)
Assertion
Ref Expression
df-0s 0s = (∅ |s ∅)

Detailed syntax breakdown of Definition df-0s
StepHypRef Expression
1 c0s 33657 . 2 class 0s
2 c0 4211 . . 3 class
3 cscut 33618 . . 3 class |s
42, 2, 3co 7170 . 2 class (∅ |s ∅)
51, 4wceq 1542 1 wff 0s = (∅ |s ∅)
Colors of variables: wff setvar class
This definition is referenced by:  0sno  33661  bday0s  33663  0slt1s  33664  bday0b  33665  made0  33695  negs0s  33762
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