Theorem nmulridd

Description: Identity law for natural multiplication. Deduction form. (Contributed by Scott Fenton, 30-Jul-2026)

	Ref	Expression
Hypothesis	nmul.1	|- ( ph -> A e. On )
Assertion	nmulridd	|- ( ph -> ( A .no 1o ) = A )

Proof

Step	Hyp	Ref	Expression
1		nmul.1	|- ( ph -> A e. On )
2		nmulrid	|- ( A e. On -> ( A .no 1o ) = A )
3	1 2	syl	|- ( ph -> ( A .no 1o ) = A )