Description: An onto mapping of an operation expressed in terms of operation values. (Contributed by NM, 29-Oct-2006)
Ref | Expression | ||
---|---|---|---|
Assertion | foov | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dffo3 | |
|
2 | fveq2 | |
|
3 | df-ov | |
|
4 | 2 3 | eqtr4di | |
5 | 4 | eqeq2d | |
6 | 5 | rexxp | |
7 | 6 | ralbii | |
8 | 7 | anbi2i | |
9 | 1 8 | bitri | |