Theorem vscandx

Description: Index value of the df-vsca slot. (Contributed by Mario Carneiro, 14-Aug-2015) (New usage is discouraged.)

	Ref	Expression
Assertion	vscandx	$$⊢{\cdot }_{\mathrm{ndx}}=6$$

Proof

Step	Hyp	Ref	Expression
1		df-vsca	$$⊢{\cdot }_{𝑠}=\mathrm{Slot}6$$
2		6nn	$$⊢6\in \mathbb{N}$$
3	1 2	ndxarg	$$⊢{\cdot }_{\mathrm{ndx}}=6$$