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 e. V -> [_ A / x ]_ B = B ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nfcv | |- F/_ x B |
|
| 2 | 1 | csbconstgf | |- ( A e. V -> [_ A / x ]_ B = B ) |