Theorem scandx

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

	Ref	Expression
Assertion	scandx	⊢ ( Scalar ‘ ndx ) = 5

Proof

Step	Hyp	Ref	Expression
1		df-sca	⊢ Scalar = Slot 5
2		5nn	⊢ 5 ∈ ℕ
3	1 2	ndxarg	⊢ ( Scalar ‘ ndx ) = 5