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Description: Decomposition of a vector into projections. This formulation of axpjpj avoids pjhth . (Contributed by Mario Carneiro, 15-May-2014) (New usage is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | pjpjpre.1 | |- ( ph -> H e. CH ) |
|
| pjpjpre.2 | |- ( ph -> A e. ( H +H ( _|_ ` H ) ) ) |
||
| Assertion | pjpjpre | |- ( ph -> A = ( ( ( projh ` H ) ` A ) +h ( ( projh ` ( _|_ ` H ) ) ` A ) ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pjpjpre.1 | |- ( ph -> H e. CH ) |
|
| 2 | pjpjpre.2 | |- ( ph -> A e. ( H +H ( _|_ ` H ) ) ) |
|
| 3 | chsh | |- ( H e. CH -> H e. SH ) |
|
| 4 | 1 3 | syl | |- ( ph -> H e. SH ) |
| 5 | shocsh | |- ( H e. SH -> ( _|_ ` H ) e. SH ) |
|
| 6 | 4 5 | syl | |- ( ph -> ( _|_ ` H ) e. SH ) |
| 7 | shsel | |- ( ( H e. SH /\ ( _|_ ` H ) e. SH ) -> ( A e. ( H +H ( _|_ ` H ) ) <-> E. x e. H E. y e. ( _|_ ` H ) A = ( x +h y ) ) ) |
|
| 8 | 4 6 7 | syl2anc | |- ( ph -> ( A e. ( H +H ( _|_ ` H ) ) <-> E. x e. H E. y e. ( _|_ ` H ) A = ( x +h y ) ) ) |
| 9 | 2 8 | mpbid | |- ( ph -> E. x e. H E. y e. ( _|_ ` H ) A = ( x +h y ) ) |
| 10 | simprr | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> A = ( x +h y ) ) |
|
| 11 | simprll | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> x e. H ) |
|
| 12 | simprlr | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> y e. ( _|_ ` H ) ) |
|
| 13 | rspe | |- ( ( y e. ( _|_ ` H ) /\ A = ( x +h y ) ) -> E. y e. ( _|_ ` H ) A = ( x +h y ) ) |
|
| 14 | 12 10 13 | syl2anc | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> E. y e. ( _|_ ` H ) A = ( x +h y ) ) |
| 15 | pjpreeq | |- ( ( H e. CH /\ A e. ( H +H ( _|_ ` H ) ) ) -> ( ( ( projh ` H ) ` A ) = x <-> ( x e. H /\ E. y e. ( _|_ ` H ) A = ( x +h y ) ) ) ) |
|
| 16 | 1 2 15 | syl2anc | |- ( ph -> ( ( ( projh ` H ) ` A ) = x <-> ( x e. H /\ E. y e. ( _|_ ` H ) A = ( x +h y ) ) ) ) |
| 17 | 16 | adantr | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> ( ( ( projh ` H ) ` A ) = x <-> ( x e. H /\ E. y e. ( _|_ ` H ) A = ( x +h y ) ) ) ) |
| 18 | 11 14 17 | mpbir2and | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> ( ( projh ` H ) ` A ) = x ) |
| 19 | shococss | |- ( H e. SH -> H C_ ( _|_ ` ( _|_ ` H ) ) ) |
|
| 20 | 4 19 | syl | |- ( ph -> H C_ ( _|_ ` ( _|_ ` H ) ) ) |
| 21 | 20 | adantr | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> H C_ ( _|_ ` ( _|_ ` H ) ) ) |
| 22 | 21 11 | sseldd | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> x e. ( _|_ ` ( _|_ ` H ) ) ) |
| 23 | 1 | adantr | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> H e. CH ) |
| 24 | 23 3 | syl | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> H e. SH ) |
| 25 | shel | |- ( ( H e. SH /\ x e. H ) -> x e. ~H ) |
|
| 26 | 24 11 25 | syl2anc | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> x e. ~H ) |
| 27 | 24 5 | syl | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> ( _|_ ` H ) e. SH ) |
| 28 | shel | |- ( ( ( _|_ ` H ) e. SH /\ y e. ( _|_ ` H ) ) -> y e. ~H ) |
|
| 29 | 27 12 28 | syl2anc | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> y e. ~H ) |
| 30 | ax-hvcom | |- ( ( x e. ~H /\ y e. ~H ) -> ( x +h y ) = ( y +h x ) ) |
|
| 31 | 26 29 30 | syl2anc | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> ( x +h y ) = ( y +h x ) ) |
| 32 | 10 31 | eqtrd | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> A = ( y +h x ) ) |
| 33 | rspe | |- ( ( x e. ( _|_ ` ( _|_ ` H ) ) /\ A = ( y +h x ) ) -> E. x e. ( _|_ ` ( _|_ ` H ) ) A = ( y +h x ) ) |
|
| 34 | 22 32 33 | syl2anc | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> E. x e. ( _|_ ` ( _|_ ` H ) ) A = ( y +h x ) ) |
| 35 | choccl | |- ( H e. CH -> ( _|_ ` H ) e. CH ) |
|
| 36 | 1 35 | syl | |- ( ph -> ( _|_ ` H ) e. CH ) |
| 37 | shocsh | |- ( ( _|_ ` H ) e. SH -> ( _|_ ` ( _|_ ` H ) ) e. SH ) |
|
| 38 | 6 37 | syl | |- ( ph -> ( _|_ ` ( _|_ ` H ) ) e. SH ) |
| 39 | shless | |- ( ( ( H e. SH /\ ( _|_ ` ( _|_ ` H ) ) e. SH /\ ( _|_ ` H ) e. SH ) /\ H C_ ( _|_ ` ( _|_ ` H ) ) ) -> ( H +H ( _|_ ` H ) ) C_ ( ( _|_ ` ( _|_ ` H ) ) +H ( _|_ ` H ) ) ) |
|
| 40 | 4 38 6 20 39 | syl31anc | |- ( ph -> ( H +H ( _|_ ` H ) ) C_ ( ( _|_ ` ( _|_ ` H ) ) +H ( _|_ ` H ) ) ) |
| 41 | shscom | |- ( ( ( _|_ ` H ) e. SH /\ ( _|_ ` ( _|_ ` H ) ) e. SH ) -> ( ( _|_ ` H ) +H ( _|_ ` ( _|_ ` H ) ) ) = ( ( _|_ ` ( _|_ ` H ) ) +H ( _|_ ` H ) ) ) |
|
| 42 | 6 38 41 | syl2anc | |- ( ph -> ( ( _|_ ` H ) +H ( _|_ ` ( _|_ ` H ) ) ) = ( ( _|_ ` ( _|_ ` H ) ) +H ( _|_ ` H ) ) ) |
| 43 | 40 42 | sseqtrrd | |- ( ph -> ( H +H ( _|_ ` H ) ) C_ ( ( _|_ ` H ) +H ( _|_ ` ( _|_ ` H ) ) ) ) |
| 44 | 43 2 | sseldd | |- ( ph -> A e. ( ( _|_ ` H ) +H ( _|_ ` ( _|_ ` H ) ) ) ) |
| 45 | pjpreeq | |- ( ( ( _|_ ` H ) e. CH /\ A e. ( ( _|_ ` H ) +H ( _|_ ` ( _|_ ` H ) ) ) ) -> ( ( ( projh ` ( _|_ ` H ) ) ` A ) = y <-> ( y e. ( _|_ ` H ) /\ E. x e. ( _|_ ` ( _|_ ` H ) ) A = ( y +h x ) ) ) ) |
|
| 46 | 36 44 45 | syl2anc | |- ( ph -> ( ( ( projh ` ( _|_ ` H ) ) ` A ) = y <-> ( y e. ( _|_ ` H ) /\ E. x e. ( _|_ ` ( _|_ ` H ) ) A = ( y +h x ) ) ) ) |
| 47 | 46 | adantr | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> ( ( ( projh ` ( _|_ ` H ) ) ` A ) = y <-> ( y e. ( _|_ ` H ) /\ E. x e. ( _|_ ` ( _|_ ` H ) ) A = ( y +h x ) ) ) ) |
| 48 | 12 34 47 | mpbir2and | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> ( ( projh ` ( _|_ ` H ) ) ` A ) = y ) |
| 49 | 18 48 | oveq12d | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> ( ( ( projh ` H ) ` A ) +h ( ( projh ` ( _|_ ` H ) ) ` A ) ) = ( x +h y ) ) |
| 50 | 10 49 | eqtr4d | |- ( ( ph /\ ( ( x e. H /\ y e. ( _|_ ` H ) ) /\ A = ( x +h y ) ) ) -> A = ( ( ( projh ` H ) ` A ) +h ( ( projh ` ( _|_ ` H ) ) ` A ) ) ) |
| 51 | 50 | exp32 | |- ( ph -> ( ( x e. H /\ y e. ( _|_ ` H ) ) -> ( A = ( x +h y ) -> A = ( ( ( projh ` H ) ` A ) +h ( ( projh ` ( _|_ ` H ) ) ` A ) ) ) ) ) |
| 52 | 51 | rexlimdvv | |- ( ph -> ( E. x e. H E. y e. ( _|_ ` H ) A = ( x +h y ) -> A = ( ( ( projh ` H ) ` A ) +h ( ( projh ` ( _|_ ` H ) ) ` A ) ) ) ) |
| 53 | 9 52 | mpd | |- ( ph -> A = ( ( ( projh ` H ) ` A ) +h ( ( projh ` ( _|_ ` H ) ) ` A ) ) ) |