Description: Lemma for prtex , prter2 and prter3 . (Contributed by Rodolfo Medina, 14-Oct-2010) (Revised by Mario Carneiro, 12-Aug-2015)
Ref | Expression | ||
---|---|---|---|
Hypothesis | prtlem13.1 | |
|
Assertion | prtlem16 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | prtlem13.1 | |
|
2 | vex | |
|
3 | 2 | eldm | |
4 | 1 | prtlem13 | |
5 | 4 | exbii | |
6 | elunii | |
|
7 | 6 | ancoms | |
8 | 7 | adantrr | |
9 | 8 | rexlimiva | |
10 | 9 | exlimiv | |
11 | eluni2 | |
|
12 | elequ1 | |
|
13 | 12 | anbi2d | |
14 | pm4.24 | |
|
15 | 13 14 | bitr4di | |
16 | 15 | rexbidv | |
17 | 2 16 | spcev | |
18 | 11 17 | sylbi | |
19 | 10 18 | impbii | |
20 | 3 5 19 | 3bitri | |
21 | 20 | eqriv | |