Description: Equality deduction for operation value, analogous to oveq123d . (Contributed by Alexander van der Vekens, 26-May-2017)
Ref | Expression | ||
---|---|---|---|
Hypotheses | aoveq123d.1 | |
|
aoveq123d.2 | |
||
aoveq123d.3 | |
||
Assertion | aoveq123d | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | aoveq123d.1 | |
|
2 | aoveq123d.2 | |
|
3 | aoveq123d.3 | |
|
4 | 2 3 | opeq12d | |
5 | 1 4 | afveq12d | |
6 | df-aov | |
|
7 | df-aov | |
|
8 | 5 6 7 | 3eqtr4g | |