Description: Surreal less-than or equal in terms of less-than. Deduction version. (Contributed by Scott Fenton, 25-Feb-2026)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | sled.1 | |- ( ph -> A e. No ) |
|
| sled.2 | |- ( ph -> B e. No ) |
||
| Assertion | sleloed | |- ( ph -> ( A <_s B <-> ( A |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sled.1 | |- ( ph -> A e. No ) |
|
| 2 | sled.2 | |- ( ph -> B e. No ) |
|
| 3 | sleloe | |- ( ( A e. No /\ B e. No ) -> ( A <_s B <-> ( A |
|
| 4 | 1 2 3 | syl2anc | |- ( ph -> ( A <_s B <-> ( A |