Description: Restriction of an operator abstraction. (Contributed by Jeff Madsen, 2-Sep-2009)
Ref | Expression | ||
---|---|---|---|
Assertion | resoprab2 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | resoprab | |
|
2 | anass | |
|
3 | an4 | |
|
4 | ssel | |
|
5 | 4 | pm4.71d | |
6 | 5 | bicomd | |
7 | ssel | |
|
8 | 7 | pm4.71d | |
9 | 8 | bicomd | |
10 | 6 9 | bi2anan9 | |
11 | 3 10 | bitrid | |
12 | 11 | anbi1d | |
13 | 2 12 | bitr3id | |
14 | 13 | oprabbidv | |
15 | 1 14 | eqtrid | |