Description: Generalization of antecedent. (Contributed by NM, 5-Jan-1993) (Proof modification is discouraged.) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Hypothesis | sps-o.1 | |- ( ph -> ps ) |
|
Assertion | sps-o | |- ( A. x ph -> ps ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sps-o.1 | |- ( ph -> ps ) |
|
2 | ax-c5 | |- ( A. x ph -> ph ) |
|
3 | 2 1 | syl | |- ( A. x ph -> ps ) |