Description: Obsolete version of nfralw as of 13-Dec-2024. (Contributed by NM, 1-Sep-1999) (Revised by Gino Giotto, 10-Jan-2024) (Proof modification is discouraged.) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Hypotheses | nfralw.1 | |- F/_ x A |
|
nfralw.2 | |- F/ x ph |
||
Assertion | nfralwOLD | |- F/ x A. y e. A ph |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfralw.1 | |- F/_ x A |
|
2 | nfralw.2 | |- F/ x ph |
|
3 | nftru | |- F/ y T. |
|
4 | 1 | a1i | |- ( T. -> F/_ x A ) |
5 | 2 | a1i | |- ( T. -> F/ x ph ) |
6 | 3 4 5 | nfraldw | |- ( T. -> F/ x A. y e. A ph ) |
7 | 6 | mptru | |- F/ x A. y e. A ph |