Description: The second component of an arrow is the corresponding morphism (without the domain/codomain tag). (Contributed by Mario Carneiro, 11-Jan-2017)
Ref | Expression | ||
---|---|---|---|
Hypotheses | homahom.h | |
|
homahom.j | |
||
Assertion | homahom | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | homahom.h | |
|
2 | homahom.j | |
|
3 | 1 | homarel | |
4 | 1st2ndbr | |
|
5 | 3 4 | mpan | |
6 | 1 2 | homahom2 | |
7 | 5 6 | syl | |