Theorem csbconstgOLD

Description: Obsolete version of csbconstg as of 15-Oct-2024. (Contributed by Alan Sare, 22-Jul-2012) (Proof modification is discouraged.) (New usage is discouraged.)

	Ref	Expression
Assertion	csbconstgOLD	$$⊢A\in V\to ⦋A/x⦌B=B$$

Proof

Step	Hyp	Ref	Expression
1		nfcv	$$⊢\underset{\_}{Ⅎ}xB$$
2	1	csbconstgf	$$⊢A\in V\to ⦋A/x⦌B=B$$