Theorem bj-grpssmndel

Description: Groups are monoids (elemental version). Shorter proof of grpmnd . (Contributed by BJ, 5-Jan-2024) (Proof modification is discouraged.)

	Ref	Expression
Assertion	bj-grpssmndel	|- ( A e. Grp -> A e. Mnd )

Proof

Step	Hyp	Ref	Expression
1		bj-grpssmnd	|- Grp C_ Mnd
2	1	sseli	|- ( A e. Grp -> A e. Mnd )