Description: Closed theorem version of ceqsalg . (Contributed by NM, 28-Feb-2013) (Revised by Mario Carneiro, 10-Oct-2016)
Ref | Expression | ||
---|---|---|---|
Assertion | ceqsalt | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elisset | |
|
2 | 1 | 3ad2ant3 | |
3 | biimp | |
|
4 | 3 | imim3i | |
5 | 4 | al2imi | |
6 | 5 | 3ad2ant2 | |
7 | 19.23t | |
|
8 | 7 | 3ad2ant1 | |
9 | 6 8 | sylibd | |
10 | 2 9 | mpid | |
11 | biimpr | |
|
12 | 11 | imim2i | |
13 | 12 | com23 | |
14 | 13 | alimi | |
15 | 14 | 3ad2ant2 | |
16 | 19.21t | |
|
17 | 16 | 3ad2ant1 | |
18 | 15 17 | mpbid | |
19 | 10 18 | impbid | |