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Metamath Proof Explorer

Theorem tsetid

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

		Ref	Expression
	Assertion	tsetid	$⊢ TopSet = Slot TopSet (ndx)$

Step	Hyp	Ref	Expression
1		df-tset	$⊢ TopSet = Slot 9$
2		9nn	$⊢ 9 \in ℕ$
3	1 2	ndxid	$⊢ TopSet = Slot TopSet (ndx)$