Step |
Hyp |
Ref |
Expression |
1 |
|
prfval.k |
|- P = ( F pairF G ) |
2 |
|
prfval.b |
|- B = ( Base ` C ) |
3 |
|
prfval.h |
|- H = ( Hom ` C ) |
4 |
|
prfval.c |
|- ( ph -> F e. ( C Func D ) ) |
5 |
|
prfval.d |
|- ( ph -> G e. ( C Func E ) ) |
6 |
|
prf1.x |
|- ( ph -> X e. B ) |
7 |
1 2 3 4 5
|
prfval |
|- ( ph -> P = <. ( x e. B |-> <. ( ( 1st ` F ) ` x ) , ( ( 1st ` G ) ` x ) >. ) , ( x e. B , y e. B |-> ( h e. ( x H y ) |-> <. ( ( x ( 2nd ` F ) y ) ` h ) , ( ( x ( 2nd ` G ) y ) ` h ) >. ) ) >. ) |
8 |
2
|
fvexi |
|- B e. _V |
9 |
8
|
mptex |
|- ( x e. B |-> <. ( ( 1st ` F ) ` x ) , ( ( 1st ` G ) ` x ) >. ) e. _V |
10 |
8 8
|
mpoex |
|- ( x e. B , y e. B |-> ( h e. ( x H y ) |-> <. ( ( x ( 2nd ` F ) y ) ` h ) , ( ( x ( 2nd ` G ) y ) ` h ) >. ) ) e. _V |
11 |
9 10
|
op1std |
|- ( P = <. ( x e. B |-> <. ( ( 1st ` F ) ` x ) , ( ( 1st ` G ) ` x ) >. ) , ( x e. B , y e. B |-> ( h e. ( x H y ) |-> <. ( ( x ( 2nd ` F ) y ) ` h ) , ( ( x ( 2nd ` G ) y ) ` h ) >. ) ) >. -> ( 1st ` P ) = ( x e. B |-> <. ( ( 1st ` F ) ` x ) , ( ( 1st ` G ) ` x ) >. ) ) |
12 |
7 11
|
syl |
|- ( ph -> ( 1st ` P ) = ( x e. B |-> <. ( ( 1st ` F ) ` x ) , ( ( 1st ` G ) ` x ) >. ) ) |
13 |
|
simpr |
|- ( ( ph /\ x = X ) -> x = X ) |
14 |
13
|
fveq2d |
|- ( ( ph /\ x = X ) -> ( ( 1st ` F ) ` x ) = ( ( 1st ` F ) ` X ) ) |
15 |
13
|
fveq2d |
|- ( ( ph /\ x = X ) -> ( ( 1st ` G ) ` x ) = ( ( 1st ` G ) ` X ) ) |
16 |
14 15
|
opeq12d |
|- ( ( ph /\ x = X ) -> <. ( ( 1st ` F ) ` x ) , ( ( 1st ` G ) ` x ) >. = <. ( ( 1st ` F ) ` X ) , ( ( 1st ` G ) ` X ) >. ) |
17 |
|
opex |
|- <. ( ( 1st ` F ) ` X ) , ( ( 1st ` G ) ` X ) >. e. _V |
18 |
17
|
a1i |
|- ( ph -> <. ( ( 1st ` F ) ` X ) , ( ( 1st ` G ) ` X ) >. e. _V ) |
19 |
12 16 6 18
|
fvmptd |
|- ( ph -> ( ( 1st ` P ) ` X ) = <. ( ( 1st ` F ) ` X ) , ( ( 1st ` G ) ` X ) >. ) |