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Description: The dual modular pair property expressed in terms of the modular pair property, that hold in Hilbert lattices. Remark 29.6 of MaedaMaeda p. 130. (Contributed by NM, 27-Apr-2006) (New usage is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | dmdmd | |- ( ( A e. CH /\ B e. CH ) -> ( A MH* B <-> ( _|_ ` A ) MH ( _|_ ` B ) ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sseq1 | |- ( y = ( _|_ ` x ) -> ( y C_ ( _|_ ` B ) <-> ( _|_ ` x ) C_ ( _|_ ` B ) ) ) |
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| 2 | oveq1 | |- ( y = ( _|_ ` x ) -> ( y vH ( _|_ ` A ) ) = ( ( _|_ ` x ) vH ( _|_ ` A ) ) ) |
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| 3 | 2 | ineq1d | |- ( y = ( _|_ ` x ) -> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) ) |
| 4 | oveq1 | |- ( y = ( _|_ ` x ) -> ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) = ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) |
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| 5 | 3 4 | eqeq12d | |- ( y = ( _|_ ` x ) -> ( ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) <-> ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) |
| 6 | 1 5 | imbi12d | |- ( y = ( _|_ ` x ) -> ( ( y C_ ( _|_ ` B ) -> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) <-> ( ( _|_ ` x ) C_ ( _|_ ` B ) -> ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) ) |
| 7 | 6 | rspccv | |- ( A. y e. CH ( y C_ ( _|_ ` B ) -> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) -> ( ( _|_ ` x ) e. CH -> ( ( _|_ ` x ) C_ ( _|_ ` B ) -> ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) ) |
| 8 | choccl | |- ( x e. CH -> ( _|_ ` x ) e. CH ) |
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| 9 | 8 | imim1i | |- ( ( ( _|_ ` x ) e. CH -> ( ( _|_ ` x ) C_ ( _|_ ` B ) -> ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) -> ( x e. CH -> ( ( _|_ ` x ) C_ ( _|_ ` B ) -> ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) ) |
| 10 | 9 | com12 | |- ( x e. CH -> ( ( ( _|_ ` x ) e. CH -> ( ( _|_ ` x ) C_ ( _|_ ` B ) -> ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) -> ( ( _|_ ` x ) C_ ( _|_ ` B ) -> ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) ) |
| 11 | 10 | adantl | |- ( ( ( A e. CH /\ B e. CH ) /\ x e. CH ) -> ( ( ( _|_ ` x ) e. CH -> ( ( _|_ ` x ) C_ ( _|_ ` B ) -> ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) -> ( ( _|_ ` x ) C_ ( _|_ ` B ) -> ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) ) |
| 12 | chsscon3 | |- ( ( B e. CH /\ x e. CH ) -> ( B C_ x <-> ( _|_ ` x ) C_ ( _|_ ` B ) ) ) |
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| 13 | 12 | biimpd | |- ( ( B e. CH /\ x e. CH ) -> ( B C_ x -> ( _|_ ` x ) C_ ( _|_ ` B ) ) ) |
| 14 | 13 | adantll | |- ( ( ( A e. CH /\ B e. CH ) /\ x e. CH ) -> ( B C_ x -> ( _|_ ` x ) C_ ( _|_ ` B ) ) ) |
| 15 | fveq2 | |- ( ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) -> ( _|_ ` ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) ) = ( _|_ ` ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) |
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| 16 | choccl | |- ( A e. CH -> ( _|_ ` A ) e. CH ) |
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| 17 | chjcl | |- ( ( ( _|_ ` x ) e. CH /\ ( _|_ ` A ) e. CH ) -> ( ( _|_ ` x ) vH ( _|_ ` A ) ) e. CH ) |
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| 18 | 8 16 17 | syl2an | |- ( ( x e. CH /\ A e. CH ) -> ( ( _|_ ` x ) vH ( _|_ ` A ) ) e. CH ) |
| 19 | chdmm3 | |- ( ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) e. CH /\ B e. CH ) -> ( _|_ ` ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) ) = ( ( _|_ ` ( ( _|_ ` x ) vH ( _|_ ` A ) ) ) vH B ) ) |
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| 20 | 18 19 | sylan | |- ( ( ( x e. CH /\ A e. CH ) /\ B e. CH ) -> ( _|_ ` ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) ) = ( ( _|_ ` ( ( _|_ ` x ) vH ( _|_ ` A ) ) ) vH B ) ) |
| 21 | chdmj4 | |- ( ( x e. CH /\ A e. CH ) -> ( _|_ ` ( ( _|_ ` x ) vH ( _|_ ` A ) ) ) = ( x i^i A ) ) |
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| 22 | 21 | adantr | |- ( ( ( x e. CH /\ A e. CH ) /\ B e. CH ) -> ( _|_ ` ( ( _|_ ` x ) vH ( _|_ ` A ) ) ) = ( x i^i A ) ) |
| 23 | 22 | oveq1d | |- ( ( ( x e. CH /\ A e. CH ) /\ B e. CH ) -> ( ( _|_ ` ( ( _|_ ` x ) vH ( _|_ ` A ) ) ) vH B ) = ( ( x i^i A ) vH B ) ) |
| 24 | 20 23 | eqtrd | |- ( ( ( x e. CH /\ A e. CH ) /\ B e. CH ) -> ( _|_ ` ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) ) = ( ( x i^i A ) vH B ) ) |
| 25 | 24 | anasss | |- ( ( x e. CH /\ ( A e. CH /\ B e. CH ) ) -> ( _|_ ` ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) ) = ( ( x i^i A ) vH B ) ) |
| 26 | choccl | |- ( B e. CH -> ( _|_ ` B ) e. CH ) |
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| 27 | chincl | |- ( ( ( _|_ ` A ) e. CH /\ ( _|_ ` B ) e. CH ) -> ( ( _|_ ` A ) i^i ( _|_ ` B ) ) e. CH ) |
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| 28 | 16 26 27 | syl2an | |- ( ( A e. CH /\ B e. CH ) -> ( ( _|_ ` A ) i^i ( _|_ ` B ) ) e. CH ) |
| 29 | chdmj2 | |- ( ( x e. CH /\ ( ( _|_ ` A ) i^i ( _|_ ` B ) ) e. CH ) -> ( _|_ ` ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) = ( x i^i ( _|_ ` ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) |
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| 30 | 28 29 | sylan2 | |- ( ( x e. CH /\ ( A e. CH /\ B e. CH ) ) -> ( _|_ ` ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) = ( x i^i ( _|_ ` ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) |
| 31 | chdmm4 | |- ( ( A e. CH /\ B e. CH ) -> ( _|_ ` ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) = ( A vH B ) ) |
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| 32 | 31 | adantl | |- ( ( x e. CH /\ ( A e. CH /\ B e. CH ) ) -> ( _|_ ` ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) = ( A vH B ) ) |
| 33 | 32 | ineq2d | |- ( ( x e. CH /\ ( A e. CH /\ B e. CH ) ) -> ( x i^i ( _|_ ` ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) = ( x i^i ( A vH B ) ) ) |
| 34 | 30 33 | eqtrd | |- ( ( x e. CH /\ ( A e. CH /\ B e. CH ) ) -> ( _|_ ` ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) = ( x i^i ( A vH B ) ) ) |
| 35 | 25 34 | eqeq12d | |- ( ( x e. CH /\ ( A e. CH /\ B e. CH ) ) -> ( ( _|_ ` ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) ) = ( _|_ ` ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) <-> ( ( x i^i A ) vH B ) = ( x i^i ( A vH B ) ) ) ) |
| 36 | 35 | ancoms | |- ( ( ( A e. CH /\ B e. CH ) /\ x e. CH ) -> ( ( _|_ ` ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) ) = ( _|_ ` ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) <-> ( ( x i^i A ) vH B ) = ( x i^i ( A vH B ) ) ) ) |
| 37 | 15 36 | imbitrid | |- ( ( ( A e. CH /\ B e. CH ) /\ x e. CH ) -> ( ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) -> ( ( x i^i A ) vH B ) = ( x i^i ( A vH B ) ) ) ) |
| 38 | 14 37 | imim12d | |- ( ( ( A e. CH /\ B e. CH ) /\ x e. CH ) -> ( ( ( _|_ ` x ) C_ ( _|_ ` B ) -> ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) -> ( B C_ x -> ( ( x i^i A ) vH B ) = ( x i^i ( A vH B ) ) ) ) ) |
| 39 | 11 38 | syld | |- ( ( ( A e. CH /\ B e. CH ) /\ x e. CH ) -> ( ( ( _|_ ` x ) e. CH -> ( ( _|_ ` x ) C_ ( _|_ ` B ) -> ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) -> ( B C_ x -> ( ( x i^i A ) vH B ) = ( x i^i ( A vH B ) ) ) ) ) |
| 40 | 39 | ex | |- ( ( A e. CH /\ B e. CH ) -> ( x e. CH -> ( ( ( _|_ ` x ) e. CH -> ( ( _|_ ` x ) C_ ( _|_ ` B ) -> ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) -> ( B C_ x -> ( ( x i^i A ) vH B ) = ( x i^i ( A vH B ) ) ) ) ) ) |
| 41 | 40 | com23 | |- ( ( A e. CH /\ B e. CH ) -> ( ( ( _|_ ` x ) e. CH -> ( ( _|_ ` x ) C_ ( _|_ ` B ) -> ( ( ( _|_ ` x ) vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( ( _|_ ` x ) vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) -> ( x e. CH -> ( B C_ x -> ( ( x i^i A ) vH B ) = ( x i^i ( A vH B ) ) ) ) ) ) |
| 42 | 7 41 | syl5 | |- ( ( A e. CH /\ B e. CH ) -> ( A. y e. CH ( y C_ ( _|_ ` B ) -> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) -> ( x e. CH -> ( B C_ x -> ( ( x i^i A ) vH B ) = ( x i^i ( A vH B ) ) ) ) ) ) |
| 43 | 42 | ralrimdv | |- ( ( A e. CH /\ B e. CH ) -> ( A. y e. CH ( y C_ ( _|_ ` B ) -> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) -> A. x e. CH ( B C_ x -> ( ( x i^i A ) vH B ) = ( x i^i ( A vH B ) ) ) ) ) |
| 44 | sseq2 | |- ( x = ( _|_ ` y ) -> ( B C_ x <-> B C_ ( _|_ ` y ) ) ) |
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| 45 | ineq1 | |- ( x = ( _|_ ` y ) -> ( x i^i A ) = ( ( _|_ ` y ) i^i A ) ) |
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| 46 | 45 | oveq1d | |- ( x = ( _|_ ` y ) -> ( ( x i^i A ) vH B ) = ( ( ( _|_ ` y ) i^i A ) vH B ) ) |
| 47 | ineq1 | |- ( x = ( _|_ ` y ) -> ( x i^i ( A vH B ) ) = ( ( _|_ ` y ) i^i ( A vH B ) ) ) |
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| 48 | 46 47 | eqeq12d | |- ( x = ( _|_ ` y ) -> ( ( ( x i^i A ) vH B ) = ( x i^i ( A vH B ) ) <-> ( ( ( _|_ ` y ) i^i A ) vH B ) = ( ( _|_ ` y ) i^i ( A vH B ) ) ) ) |
| 49 | 44 48 | imbi12d | |- ( x = ( _|_ ` y ) -> ( ( B C_ x -> ( ( x i^i A ) vH B ) = ( x i^i ( A vH B ) ) ) <-> ( B C_ ( _|_ ` y ) -> ( ( ( _|_ ` y ) i^i A ) vH B ) = ( ( _|_ ` y ) i^i ( A vH B ) ) ) ) ) |
| 50 | 49 | rspccv | |- ( A. x e. CH ( B C_ x -> ( ( x i^i A ) vH B ) = ( x i^i ( A vH B ) ) ) -> ( ( _|_ ` y ) e. CH -> ( B C_ ( _|_ ` y ) -> ( ( ( _|_ ` y ) i^i A ) vH B ) = ( ( _|_ ` y ) i^i ( A vH B ) ) ) ) ) |
| 51 | choccl | |- ( y e. CH -> ( _|_ ` y ) e. CH ) |
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| 52 | 51 | imim1i | |- ( ( ( _|_ ` y ) e. CH -> ( B C_ ( _|_ ` y ) -> ( ( ( _|_ ` y ) i^i A ) vH B ) = ( ( _|_ ` y ) i^i ( A vH B ) ) ) ) -> ( y e. CH -> ( B C_ ( _|_ ` y ) -> ( ( ( _|_ ` y ) i^i A ) vH B ) = ( ( _|_ ` y ) i^i ( A vH B ) ) ) ) ) |
| 53 | 52 | com12 | |- ( y e. CH -> ( ( ( _|_ ` y ) e. CH -> ( B C_ ( _|_ ` y ) -> ( ( ( _|_ ` y ) i^i A ) vH B ) = ( ( _|_ ` y ) i^i ( A vH B ) ) ) ) -> ( B C_ ( _|_ ` y ) -> ( ( ( _|_ ` y ) i^i A ) vH B ) = ( ( _|_ ` y ) i^i ( A vH B ) ) ) ) ) |
| 54 | 53 | adantl | |- ( ( ( A e. CH /\ B e. CH ) /\ y e. CH ) -> ( ( ( _|_ ` y ) e. CH -> ( B C_ ( _|_ ` y ) -> ( ( ( _|_ ` y ) i^i A ) vH B ) = ( ( _|_ ` y ) i^i ( A vH B ) ) ) ) -> ( B C_ ( _|_ ` y ) -> ( ( ( _|_ ` y ) i^i A ) vH B ) = ( ( _|_ ` y ) i^i ( A vH B ) ) ) ) ) |
| 55 | chsscon2 | |- ( ( B e. CH /\ y e. CH ) -> ( B C_ ( _|_ ` y ) <-> y C_ ( _|_ ` B ) ) ) |
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| 56 | 55 | biimprd | |- ( ( B e. CH /\ y e. CH ) -> ( y C_ ( _|_ ` B ) -> B C_ ( _|_ ` y ) ) ) |
| 57 | 56 | adantll | |- ( ( ( A e. CH /\ B e. CH ) /\ y e. CH ) -> ( y C_ ( _|_ ` B ) -> B C_ ( _|_ ` y ) ) ) |
| 58 | fveq2 | |- ( ( ( ( _|_ ` y ) i^i A ) vH B ) = ( ( _|_ ` y ) i^i ( A vH B ) ) -> ( _|_ ` ( ( ( _|_ ` y ) i^i A ) vH B ) ) = ( _|_ ` ( ( _|_ ` y ) i^i ( A vH B ) ) ) ) |
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| 59 | chincl | |- ( ( ( _|_ ` y ) e. CH /\ A e. CH ) -> ( ( _|_ ` y ) i^i A ) e. CH ) |
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| 60 | 51 59 | sylan | |- ( ( y e. CH /\ A e. CH ) -> ( ( _|_ ` y ) i^i A ) e. CH ) |
| 61 | chdmj1 | |- ( ( ( ( _|_ ` y ) i^i A ) e. CH /\ B e. CH ) -> ( _|_ ` ( ( ( _|_ ` y ) i^i A ) vH B ) ) = ( ( _|_ ` ( ( _|_ ` y ) i^i A ) ) i^i ( _|_ ` B ) ) ) |
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| 62 | 60 61 | sylan | |- ( ( ( y e. CH /\ A e. CH ) /\ B e. CH ) -> ( _|_ ` ( ( ( _|_ ` y ) i^i A ) vH B ) ) = ( ( _|_ ` ( ( _|_ ` y ) i^i A ) ) i^i ( _|_ ` B ) ) ) |
| 63 | chdmm2 | |- ( ( y e. CH /\ A e. CH ) -> ( _|_ ` ( ( _|_ ` y ) i^i A ) ) = ( y vH ( _|_ ` A ) ) ) |
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| 64 | 63 | adantr | |- ( ( ( y e. CH /\ A e. CH ) /\ B e. CH ) -> ( _|_ ` ( ( _|_ ` y ) i^i A ) ) = ( y vH ( _|_ ` A ) ) ) |
| 65 | 64 | ineq1d | |- ( ( ( y e. CH /\ A e. CH ) /\ B e. CH ) -> ( ( _|_ ` ( ( _|_ ` y ) i^i A ) ) i^i ( _|_ ` B ) ) = ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) ) |
| 66 | 62 65 | eqtrd | |- ( ( ( y e. CH /\ A e. CH ) /\ B e. CH ) -> ( _|_ ` ( ( ( _|_ ` y ) i^i A ) vH B ) ) = ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) ) |
| 67 | 66 | anasss | |- ( ( y e. CH /\ ( A e. CH /\ B e. CH ) ) -> ( _|_ ` ( ( ( _|_ ` y ) i^i A ) vH B ) ) = ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) ) |
| 68 | chjcl | |- ( ( A e. CH /\ B e. CH ) -> ( A vH B ) e. CH ) |
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| 69 | chdmm2 | |- ( ( y e. CH /\ ( A vH B ) e. CH ) -> ( _|_ ` ( ( _|_ ` y ) i^i ( A vH B ) ) ) = ( y vH ( _|_ ` ( A vH B ) ) ) ) |
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| 70 | 68 69 | sylan2 | |- ( ( y e. CH /\ ( A e. CH /\ B e. CH ) ) -> ( _|_ ` ( ( _|_ ` y ) i^i ( A vH B ) ) ) = ( y vH ( _|_ ` ( A vH B ) ) ) ) |
| 71 | chdmj1 | |- ( ( A e. CH /\ B e. CH ) -> ( _|_ ` ( A vH B ) ) = ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) |
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| 72 | 71 | adantl | |- ( ( y e. CH /\ ( A e. CH /\ B e. CH ) ) -> ( _|_ ` ( A vH B ) ) = ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) |
| 73 | 72 | oveq2d | |- ( ( y e. CH /\ ( A e. CH /\ B e. CH ) ) -> ( y vH ( _|_ ` ( A vH B ) ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) |
| 74 | 70 73 | eqtrd | |- ( ( y e. CH /\ ( A e. CH /\ B e. CH ) ) -> ( _|_ ` ( ( _|_ ` y ) i^i ( A vH B ) ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) |
| 75 | 67 74 | eqeq12d | |- ( ( y e. CH /\ ( A e. CH /\ B e. CH ) ) -> ( ( _|_ ` ( ( ( _|_ ` y ) i^i A ) vH B ) ) = ( _|_ ` ( ( _|_ ` y ) i^i ( A vH B ) ) ) <-> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) |
| 76 | 75 | ancoms | |- ( ( ( A e. CH /\ B e. CH ) /\ y e. CH ) -> ( ( _|_ ` ( ( ( _|_ ` y ) i^i A ) vH B ) ) = ( _|_ ` ( ( _|_ ` y ) i^i ( A vH B ) ) ) <-> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) |
| 77 | 58 76 | imbitrid | |- ( ( ( A e. CH /\ B e. CH ) /\ y e. CH ) -> ( ( ( ( _|_ ` y ) i^i A ) vH B ) = ( ( _|_ ` y ) i^i ( A vH B ) ) -> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) |
| 78 | 57 77 | imim12d | |- ( ( ( A e. CH /\ B e. CH ) /\ y e. CH ) -> ( ( B C_ ( _|_ ` y ) -> ( ( ( _|_ ` y ) i^i A ) vH B ) = ( ( _|_ ` y ) i^i ( A vH B ) ) ) -> ( y C_ ( _|_ ` B ) -> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) ) |
| 79 | 54 78 | syld | |- ( ( ( A e. CH /\ B e. CH ) /\ y e. CH ) -> ( ( ( _|_ ` y ) e. CH -> ( B C_ ( _|_ ` y ) -> ( ( ( _|_ ` y ) i^i A ) vH B ) = ( ( _|_ ` y ) i^i ( A vH B ) ) ) ) -> ( y C_ ( _|_ ` B ) -> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) ) |
| 80 | 79 | ex | |- ( ( A e. CH /\ B e. CH ) -> ( y e. CH -> ( ( ( _|_ ` y ) e. CH -> ( B C_ ( _|_ ` y ) -> ( ( ( _|_ ` y ) i^i A ) vH B ) = ( ( _|_ ` y ) i^i ( A vH B ) ) ) ) -> ( y C_ ( _|_ ` B ) -> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) ) ) |
| 81 | 80 | com23 | |- ( ( A e. CH /\ B e. CH ) -> ( ( ( _|_ ` y ) e. CH -> ( B C_ ( _|_ ` y ) -> ( ( ( _|_ ` y ) i^i A ) vH B ) = ( ( _|_ ` y ) i^i ( A vH B ) ) ) ) -> ( y e. CH -> ( y C_ ( _|_ ` B ) -> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) ) ) |
| 82 | 50 81 | syl5 | |- ( ( A e. CH /\ B e. CH ) -> ( A. x e. CH ( B C_ x -> ( ( x i^i A ) vH B ) = ( x i^i ( A vH B ) ) ) -> ( y e. CH -> ( y C_ ( _|_ ` B ) -> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) ) ) |
| 83 | 82 | ralrimdv | |- ( ( A e. CH /\ B e. CH ) -> ( A. x e. CH ( B C_ x -> ( ( x i^i A ) vH B ) = ( x i^i ( A vH B ) ) ) -> A. y e. CH ( y C_ ( _|_ ` B ) -> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) ) |
| 84 | 43 83 | impbid | |- ( ( A e. CH /\ B e. CH ) -> ( A. y e. CH ( y C_ ( _|_ ` B ) -> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) <-> A. x e. CH ( B C_ x -> ( ( x i^i A ) vH B ) = ( x i^i ( A vH B ) ) ) ) ) |
| 85 | mdbr | |- ( ( ( _|_ ` A ) e. CH /\ ( _|_ ` B ) e. CH ) -> ( ( _|_ ` A ) MH ( _|_ ` B ) <-> A. y e. CH ( y C_ ( _|_ ` B ) -> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) ) |
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| 86 | 16 26 85 | syl2an | |- ( ( A e. CH /\ B e. CH ) -> ( ( _|_ ` A ) MH ( _|_ ` B ) <-> A. y e. CH ( y C_ ( _|_ ` B ) -> ( ( y vH ( _|_ ` A ) ) i^i ( _|_ ` B ) ) = ( y vH ( ( _|_ ` A ) i^i ( _|_ ` B ) ) ) ) ) ) |
| 87 | dmdbr | |- ( ( A e. CH /\ B e. CH ) -> ( A MH* B <-> A. x e. CH ( B C_ x -> ( ( x i^i A ) vH B ) = ( x i^i ( A vH B ) ) ) ) ) |
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| 88 | 84 86 87 | 3bitr4rd | |- ( ( A e. CH /\ B e. CH ) -> ( A MH* B <-> ( _|_ ` A ) MH ( _|_ ` B ) ) ) |