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Metamath Proof Explorer

Theorem ccondx

Description: Index value of the df-cco slot. (Contributed by Mario Carneiro, 7-Jan-2017) (New usage is discouraged.)

		Ref	Expression
	Assertion	ccondx	$⊢ comp (ndx) = 15$

Step	Hyp	Ref	Expression
1		df-cco	$⊢ comp = Slot 15$
2		1nn0	$⊢ 1 \in ℕ_{0}$
3		5nn	$⊢ 5 \in ℕ$
4	2 3	decnncl	$⊢ 15 \in ℕ$
5	1 4	ndxarg	$⊢ comp (ndx) = 15$