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Metamath Proof Explorer

Theorem plusgid

Description: Utility theorem: index-independent form of df-plusg . (Contributed by NM, 20-Oct-2012)

		Ref	Expression
	Assertion	plusgid	$⊢ +_{𝑔} = Slot +_{ndx}$

Step	Hyp	Ref	Expression
1		df-plusg	$⊢ +_{𝑔} = Slot 2$
2		2nn	$⊢ 2 \in ℕ$
3	1 2	ndxid	$⊢ +_{𝑔} = Slot +_{ndx}$