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Mirrors > Home > ILE Home > Th. List > oveq1 | Unicode version |
Description: Equality theorem for operation value. (Contributed by NM, 28-Feb-1995.) |
Ref | Expression |
---|---|
oveq1 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | opeq1 3757 | . . 3 | |
2 | 1 | fveq2d 5489 | . 2 |
3 | df-ov 5844 | . 2 | |
4 | df-ov 5844 | . 2 | |
5 | 2, 3, 4 | 3eqtr4g 2223 | 1 |
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