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Description: Lemma 6 for funcsetcestrc . (Contributed by AV, 27-Mar-2020)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | funcsetcestrc.s | |- S = ( SetCat ` U ) |
|
| funcsetcestrc.c | |- C = ( Base ` S ) |
||
| funcsetcestrc.f | |- ( ph -> F = ( x e. C |-> { <. ( Base ` ndx ) , x >. } ) ) |
||
| funcsetcestrc.u | |- ( ph -> U e. WUni ) |
||
| funcsetcestrc.o | |- ( ph -> _om e. U ) |
||
| funcsetcestrc.g | |- ( ph -> G = ( x e. C , y e. C |-> ( _I |` ( y ^m x ) ) ) ) |
||
| Assertion | funcsetcestrclem6 | |- ( ( ph /\ ( X e. C /\ Y e. C ) /\ H e. ( Y ^m X ) ) -> ( ( X G Y ) ` H ) = H ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funcsetcestrc.s | |- S = ( SetCat ` U ) |
|
| 2 | funcsetcestrc.c | |- C = ( Base ` S ) |
|
| 3 | funcsetcestrc.f | |- ( ph -> F = ( x e. C |-> { <. ( Base ` ndx ) , x >. } ) ) |
|
| 4 | funcsetcestrc.u | |- ( ph -> U e. WUni ) |
|
| 5 | funcsetcestrc.o | |- ( ph -> _om e. U ) |
|
| 6 | funcsetcestrc.g | |- ( ph -> G = ( x e. C , y e. C |-> ( _I |` ( y ^m x ) ) ) ) |
|
| 7 | 1 2 3 4 5 6 | funcsetcestrclem5 | |- ( ( ph /\ ( X e. C /\ Y e. C ) ) -> ( X G Y ) = ( _I |` ( Y ^m X ) ) ) |
| 8 | 7 | 3adant3 | |- ( ( ph /\ ( X e. C /\ Y e. C ) /\ H e. ( Y ^m X ) ) -> ( X G Y ) = ( _I |` ( Y ^m X ) ) ) |
| 9 | 8 | fveq1d | |- ( ( ph /\ ( X e. C /\ Y e. C ) /\ H e. ( Y ^m X ) ) -> ( ( X G Y ) ` H ) = ( ( _I |` ( Y ^m X ) ) ` H ) ) |
| 10 | fvresi | |- ( H e. ( Y ^m X ) -> ( ( _I |` ( Y ^m X ) ) ` H ) = H ) |
|
| 11 | 10 | 3ad2ant3 | |- ( ( ph /\ ( X e. C /\ Y e. C ) /\ H e. ( Y ^m X ) ) -> ( ( _I |` ( Y ^m X ) ) ` H ) = H ) |
| 12 | 9 11 | eqtrd | |- ( ( ph /\ ( X e. C /\ Y e. C ) /\ H e. ( Y ^m X ) ) -> ( ( X G Y ) ` H ) = H ) |