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Definition df-0s 27185
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 27183 . 2 class 0s
2 c0 4283 . . 3 class
3 cscut 27144 . . 3 class |s
42, 2, 3co 7358 . 2 class (∅ |s ∅)
51, 4wceq 1542 1 wff 0s = (∅ |s ∅)
Colors of variables: wff setvar class
This definition is referenced by:  0sno  27187  bday0s  27189  0slt1s  27190  bday0b  27191  made0  27225  negs0s  27347  muls01  27397  muls02  27398
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