Description: Lemma. (Contributed by Wolf Lammen, 30-Jun-2019)
Ref | Expression | ||
---|---|---|---|
Assertion | wl-ax11-lem8 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | axc11n | |
|
2 | 1 | con3i | |
3 | wl-ax11-lem1 | |
|
4 | 3 | notbid | |
5 | 4 | anbi1d | |
6 | 4 | anbi1d | |
7 | axc11n | |
|
8 | 7 | con3i | |
9 | wl-ax11-lem4 | |
|
10 | sbequ12 | |
|
11 | 10 | equcoms | |
12 | 11 | sps | |
13 | 12 | adantr | |
14 | 9 13 | albid | |
15 | 14 | ex | |
16 | 8 15 | syl5 | |
17 | 16 | pm5.32d | |
18 | 6 17 | bitr4d | |
19 | 18 | dral1 | |
20 | wl-ax11-lem7 | |
|
21 | wl-ax11-lem7 | |
|
22 | 19 20 21 | 3bitr3g | |
23 | 5 22 | bitr3d | |
24 | pm5.32 | |
|
25 | 23 24 | sylibr | |
26 | 25 | imp | |
27 | 2 26 | sylan2 | |