Step |
Hyp |
Ref |
Expression |
1 |
|
feq2 |
|
2 |
|
raleq |
|
3 |
2
|
raleqbi1dv |
|
4 |
1 3
|
anbi12d |
|
5 |
|
df-relp |
Could not format ( H RelPres R , S ( A , B ) <-> ( H : A --> B /\ A. x e. A A. y e. A ( x R y -> ( H ` x ) S ( H ` y ) ) ) ) : No typesetting found for |- ( H RelPres R , S ( A , B ) <-> ( H : A --> B /\ A. x e. A A. y e. A ( x R y -> ( H ` x ) S ( H ` y ) ) ) ) with typecode |- |
6 |
|
df-relp |
Could not format ( H RelPres R , S ( C , B ) <-> ( H : C --> B /\ A. x e. C A. y e. C ( x R y -> ( H ` x ) S ( H ` y ) ) ) ) : No typesetting found for |- ( H RelPres R , S ( C , B ) <-> ( H : C --> B /\ A. x e. C A. y e. C ( x R y -> ( H ` x ) S ( H ` y ) ) ) ) with typecode |- |
7 |
4 5 6
|
3bitr4g |
Could not format ( A = C -> ( H RelPres R , S ( A , B ) <-> H RelPres R , S ( C , B ) ) ) : No typesetting found for |- ( A = C -> ( H RelPres R , S ( A , B ) <-> H RelPres R , S ( C , B ) ) ) with typecode |- |