Description: Lemma. (Contributed by Wolf Lammen, 30-Jun-2019)
Ref | Expression | ||
---|---|---|---|
Assertion | wl-ax11-lem6 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-wl-11v | |
|
2 | ax-wl-11v | |
|
3 | 1 2 | impbii | |
4 | nfna1 | |
|
5 | wl-ax11-lem3 | |
|
6 | 4 5 | nfan1 | |
7 | wl-ax11-lem5 | |
|
8 | 7 | adantl | |
9 | 6 8 | albid | |
10 | 9 | ancoms | |
11 | 3 10 | bitrid | |