Theorem tsetid

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

	Ref	Expression
Assertion	tsetid	$$⊢\mathrm{TopSet}=\mathrm{Slot}\mathrm{TopSet}\left(\mathrm{ndx}\right)$$

Proof

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