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 ) |