Metamath Proof Explorer


Definition df-0s

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
Assertion df-0s Could not format assertion : No typesetting found for |- 0s = ( (/) |s (/) ) with typecode |-

Detailed syntax breakdown

Step Hyp Ref Expression
0 c0s Could not format 0s : No typesetting found for class 0s with typecode class
1 c0 class
2 cscut class | s
3 1 1 2 co class | s
4 0 3 wceq Could not format 0s = ( (/) |s (/) ) : No typesetting found for wff 0s = ( (/) |s (/) ) with typecode wff