Theorem starvndx

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

	Ref	Expression
Assertion	starvndx	$$⊢{\mathrm{*}}_{\mathrm{ndx}}=4$$

Proof

Step	Hyp	Ref	Expression
1		df-starv	$$⊢{\ast }_{𝑟}=\mathrm{Slot}4$$
2		4nn	$$⊢4\in \mathbb{N}$$
3	1 2	ndxarg	$$⊢{\mathrm{*}}_{\mathrm{ndx}}=4$$