Description: Obsolete version of sbcg as of 12-Oct-2024. (Contributed by Alan Sare, 10-Nov-2012) (Proof modification is discouraged.) (New usage is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | sbcgOLD | |- ( A e. V -> ( [. A / x ]. ph <-> ph ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nfv | |- F/ x ph |
|
| 2 | 1 | sbcgf | |- ( A e. V -> ( [. A / x ]. ph <-> ph ) ) |