Description: ac6s with sethood as antecedent. (Contributed by FL, 3-Aug-2009)
Ref | Expression | ||
---|---|---|---|
Hypothesis | ac6sg.1 | |
|
Assertion | ac6sg | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ac6sg.1 | |
|
2 | raleq | |
|
3 | feq2 | |
|
4 | raleq | |
|
5 | 3 4 | anbi12d | |
6 | 5 | exbidv | |
7 | 2 6 | imbi12d | |
8 | vex | |
|
9 | 8 1 | ac6s | |
10 | 7 9 | vtoclg | |