Description: A surreal integer is a surreal. Deduction form. (Contributed by Scott Fenton, 17-May-2025)
| Ref | Expression | ||
|---|---|---|---|
| Hypothesis | znod.1 | |- ( ph -> A e. ZZ_s ) | |
| Assertion | znod | |- ( ph -> A e. No ) | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | znod.1 | |- ( ph -> A e. ZZ_s ) | |
| 2 | zno | |- ( A e. ZZ_s -> A e. No ) | |
| 3 | 1 2 | syl | |- ( ph -> A e. No ) |