Description: Value of the canonical numerator function. (Contributed by Stefan O'Rear, 13-Sep-2014)
Ref | Expression | ||
---|---|---|---|
Assertion | qnumval | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqeq1 | |
|
2 | 1 | anbi2d | |
3 | 2 | riotabidv | |
4 | 3 | fveq2d | |
5 | df-numer | |
|
6 | fvex | |
|
7 | 4 5 6 | fvmpt | |