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Description: The polarity of a projective map. (Contributed by NM, 24-Jan-2012) (New usage is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | polpmap.b | |- B = ( Base ` K ) |
|
| polpmap.o | |- ._|_ = ( oc ` K ) |
||
| polpmap.m | |- M = ( pmap ` K ) |
||
| polpmap.p | |- P = ( _|_P ` K ) |
||
| Assertion | polpmapN | |- ( ( K e. HL /\ X e. B ) -> ( P ` ( M ` X ) ) = ( M ` ( ._|_ ` X ) ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | polpmap.b | |- B = ( Base ` K ) |
|
| 2 | polpmap.o | |- ._|_ = ( oc ` K ) |
|
| 3 | polpmap.m | |- M = ( pmap ` K ) |
|
| 4 | polpmap.p | |- P = ( _|_P ` K ) |
|
| 5 | eqid | |- ( Atoms ` K ) = ( Atoms ` K ) |
|
| 6 | 1 5 3 | pmapssat | |- ( ( K e. HL /\ X e. B ) -> ( M ` X ) C_ ( Atoms ` K ) ) |
| 7 | eqid | |- ( lub ` K ) = ( lub ` K ) |
|
| 8 | 7 2 5 3 4 | polval2N | |- ( ( K e. HL /\ ( M ` X ) C_ ( Atoms ` K ) ) -> ( P ` ( M ` X ) ) = ( M ` ( ._|_ ` ( ( lub ` K ) ` ( M ` X ) ) ) ) ) |
| 9 | 6 8 | syldan | |- ( ( K e. HL /\ X e. B ) -> ( P ` ( M ` X ) ) = ( M ` ( ._|_ ` ( ( lub ` K ) ` ( M ` X ) ) ) ) ) |
| 10 | eqid | |- ( le ` K ) = ( le ` K ) |
|
| 11 | 1 10 5 3 | pmapval | |- ( ( K e. HL /\ X e. B ) -> ( M ` X ) = { p e. ( Atoms ` K ) | p ( le ` K ) X } ) |
| 12 | 11 | fveq2d | |- ( ( K e. HL /\ X e. B ) -> ( ( lub ` K ) ` ( M ` X ) ) = ( ( lub ` K ) ` { p e. ( Atoms ` K ) | p ( le ` K ) X } ) ) |
| 13 | hlomcmat | |- ( K e. HL -> ( K e. OML /\ K e. CLat /\ K e. AtLat ) ) |
|
| 14 | 1 10 7 5 | atlatmstc | |- ( ( ( K e. OML /\ K e. CLat /\ K e. AtLat ) /\ X e. B ) -> ( ( lub ` K ) ` { p e. ( Atoms ` K ) | p ( le ` K ) X } ) = X ) |
| 15 | 13 14 | sylan | |- ( ( K e. HL /\ X e. B ) -> ( ( lub ` K ) ` { p e. ( Atoms ` K ) | p ( le ` K ) X } ) = X ) |
| 16 | 12 15 | eqtrd | |- ( ( K e. HL /\ X e. B ) -> ( ( lub ` K ) ` ( M ` X ) ) = X ) |
| 17 | 16 | fveq2d | |- ( ( K e. HL /\ X e. B ) -> ( ._|_ ` ( ( lub ` K ) ` ( M ` X ) ) ) = ( ._|_ ` X ) ) |
| 18 | 17 | fveq2d | |- ( ( K e. HL /\ X e. B ) -> ( M ` ( ._|_ ` ( ( lub ` K ) ` ( M ` X ) ) ) ) = ( M ` ( ._|_ ` X ) ) ) |
| 19 | 9 18 | eqtrd | |- ( ( K e. HL /\ X e. B ) -> ( P ` ( M ` X ) ) = ( M ` ( ._|_ ` X ) ) ) |