Description: The converse isomorphism of an isomorphism. (Contributed by NM, 5-Aug-2014)
Ref | Expression | ||
---|---|---|---|
Hypotheses | dihcnvid1.b | |
|
dihcnvid1.h | |
||
dihcnvid1.i | |
||
Assertion | dihcnvid1 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dihcnvid1.b | |
|
2 | dihcnvid1.h | |
|
3 | dihcnvid1.i | |
|
4 | eqid | |
|
5 | eqid | |
|
6 | 1 2 3 4 5 | dihf11 | |
7 | f1f1orn | |
|
8 | 6 7 | syl | |
9 | f1ocnvfv1 | |
|
10 | 8 9 | sylan | |