Description: Abelian groups are commutative monoids (elemental version). This is a shorter proof of ablcmn . (Contributed by BJ, 9-Jun-2019) (Proof modification is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | bj-ablsscmnel | |- ( A e. Abel -> A e. CMnd ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bj-ablsscmn | |- Abel C_ CMnd |
|
| 2 | 1 | sseli | |- ( A e. Abel -> A e. CMnd ) |