Description: The group addition operation as a function. (Contributed by Mario Carneiro, 14-Aug-2015)
Ref | Expression | ||
---|---|---|---|
Hypotheses | plusffval.1 | |
|
plusffval.2 | |
||
plusffval.3 | |
||
Assertion | plusfval | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | plusffval.1 | |
|
2 | plusffval.2 | |
|
3 | plusffval.3 | |
|
4 | oveq12 | |
|
5 | 1 2 3 | plusffval | |
6 | ovex | |
|
7 | 4 5 6 | ovmpoa | |