Description: Structure of an operation class abstraction. (Contributed by NM, 28-Nov-2006)
Ref | Expression | ||
---|---|---|---|
Assertion | oprabss | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | reloprab | |
|
2 | relssdmrn | |
|
3 | 1 2 | ax-mp | |
4 | reldmoprab | |
|
5 | df-rel | |
|
6 | 4 5 | mpbi | |
7 | ssv | |
|
8 | xpss12 | |
|
9 | 6 7 8 | mp2an | |
10 | 3 9 | sstri | |