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Metamath Proof Explorer

Theorem baseid

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

		Ref	Expression
	Assertion	baseid	$⊢ Base = Slot {Base}_{ndx}$

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