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Description: Foulis-Holland Theorem, part 1. If any 2 pairs in a triple of orthomodular lattice elements commute, the triple is distributive. Part of Theorem 5 in Kalmbach p. 25. ( fh1 analog.) (Contributed by NM, 8-Nov-2011) (New usage is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | omlfh1.b | |- B = ( Base ` K ) |
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| omlfh1.j | |- .\/ = ( join ` K ) |
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| omlfh1.m | |- ./\ = ( meet ` K ) |
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| omlfh1.c | |- C = ( cm ` K ) |
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| Assertion | omlfh1N | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( X ./\ ( Y .\/ Z ) ) = ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | omlfh1.b | |- B = ( Base ` K ) |
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| 2 | omlfh1.j | |- .\/ = ( join ` K ) |
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| 3 | omlfh1.m | |- ./\ = ( meet ` K ) |
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| 4 | omlfh1.c | |- C = ( cm ` K ) |
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| 5 | omllat | |- ( K e. OML -> K e. Lat ) |
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| 6 | eqid | |- ( le ` K ) = ( le ` K ) |
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| 7 | 1 6 2 3 | latledi | |- ( ( K e. Lat /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ( le ` K ) ( X ./\ ( Y .\/ Z ) ) ) |
| 8 | 5 7 | sylan | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ( le ` K ) ( X ./\ ( Y .\/ Z ) ) ) |
| 9 | 8 | 3adant3 | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ( le ` K ) ( X ./\ ( Y .\/ Z ) ) ) |
| 10 | 5 | adantr | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> K e. Lat ) |
| 11 | simpr1 | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> X e. B ) |
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| 12 | simpr2 | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> Y e. B ) |
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| 13 | simpr3 | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> Z e. B ) |
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| 14 | 1 2 | latjcl | |- ( ( K e. Lat /\ Y e. B /\ Z e. B ) -> ( Y .\/ Z ) e. B ) |
| 15 | 10 12 13 14 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( Y .\/ Z ) e. B ) |
| 16 | 1 3 | latmcom | |- ( ( K e. Lat /\ X e. B /\ ( Y .\/ Z ) e. B ) -> ( X ./\ ( Y .\/ Z ) ) = ( ( Y .\/ Z ) ./\ X ) ) |
| 17 | 10 11 15 16 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( X ./\ ( Y .\/ Z ) ) = ( ( Y .\/ Z ) ./\ X ) ) |
| 18 | omlol | |- ( K e. OML -> K e. OL ) |
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| 19 | 18 | adantr | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> K e. OL ) |
| 20 | 1 3 | latmcl | |- ( ( K e. Lat /\ X e. B /\ Y e. B ) -> ( X ./\ Y ) e. B ) |
| 21 | 10 11 12 20 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( X ./\ Y ) e. B ) |
| 22 | 1 3 | latmcl | |- ( ( K e. Lat /\ X e. B /\ Z e. B ) -> ( X ./\ Z ) e. B ) |
| 23 | 10 11 13 22 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( X ./\ Z ) e. B ) |
| 24 | eqid | |- ( oc ` K ) = ( oc ` K ) |
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| 25 | 1 2 3 24 | oldmj1 | |- ( ( K e. OL /\ ( X ./\ Y ) e. B /\ ( X ./\ Z ) e. B ) -> ( ( oc ` K ) ` ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ) = ( ( ( oc ` K ) ` ( X ./\ Y ) ) ./\ ( ( oc ` K ) ` ( X ./\ Z ) ) ) ) |
| 26 | 19 21 23 25 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( oc ` K ) ` ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ) = ( ( ( oc ` K ) ` ( X ./\ Y ) ) ./\ ( ( oc ` K ) ` ( X ./\ Z ) ) ) ) |
| 27 | 1 2 3 24 | oldmm1 | |- ( ( K e. OL /\ X e. B /\ Y e. B ) -> ( ( oc ` K ) ` ( X ./\ Y ) ) = ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ) |
| 28 | 19 11 12 27 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( oc ` K ) ` ( X ./\ Y ) ) = ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ) |
| 29 | 1 2 3 24 | oldmm1 | |- ( ( K e. OL /\ X e. B /\ Z e. B ) -> ( ( oc ` K ) ` ( X ./\ Z ) ) = ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) |
| 30 | 19 11 13 29 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( oc ` K ) ` ( X ./\ Z ) ) = ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) |
| 31 | 28 30 | oveq12d | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( ( oc ` K ) ` ( X ./\ Y ) ) ./\ ( ( oc ` K ) ` ( X ./\ Z ) ) ) = ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) |
| 32 | 26 31 | eqtrd | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( oc ` K ) ` ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ) = ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) |
| 33 | 17 32 | oveq12d | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( X ./\ ( Y .\/ Z ) ) ./\ ( ( oc ` K ) ` ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ) ) = ( ( ( Y .\/ Z ) ./\ X ) ./\ ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) ) |
| 34 | 33 | 3adant3 | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( ( X ./\ ( Y .\/ Z ) ) ./\ ( ( oc ` K ) ` ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ) ) = ( ( ( Y .\/ Z ) ./\ X ) ./\ ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) ) |
| 35 | omlop | |- ( K e. OML -> K e. OP ) |
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| 36 | 35 | adantr | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> K e. OP ) |
| 37 | 1 24 | opoccl | |- ( ( K e. OP /\ X e. B ) -> ( ( oc ` K ) ` X ) e. B ) |
| 38 | 36 11 37 | syl2anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( oc ` K ) ` X ) e. B ) |
| 39 | 1 24 | opoccl | |- ( ( K e. OP /\ Y e. B ) -> ( ( oc ` K ) ` Y ) e. B ) |
| 40 | 36 12 39 | syl2anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( oc ` K ) ` Y ) e. B ) |
| 41 | 1 2 | latjcl | |- ( ( K e. Lat /\ ( ( oc ` K ) ` X ) e. B /\ ( ( oc ` K ) ` Y ) e. B ) -> ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) e. B ) |
| 42 | 10 38 40 41 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) e. B ) |
| 43 | 1 24 | opoccl | |- ( ( K e. OP /\ Z e. B ) -> ( ( oc ` K ) ` Z ) e. B ) |
| 44 | 36 13 43 | syl2anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( oc ` K ) ` Z ) e. B ) |
| 45 | 1 2 | latjcl | |- ( ( K e. Lat /\ ( ( oc ` K ) ` X ) e. B /\ ( ( oc ` K ) ` Z ) e. B ) -> ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) e. B ) |
| 46 | 10 38 44 45 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) e. B ) |
| 47 | 1 3 | latmcl | |- ( ( K e. Lat /\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) e. B /\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) e. B ) -> ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) e. B ) |
| 48 | 10 42 46 47 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) e. B ) |
| 49 | 1 3 | latmassOLD | |- ( ( K e. OL /\ ( ( Y .\/ Z ) e. B /\ X e. B /\ ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) e. B ) ) -> ( ( ( Y .\/ Z ) ./\ X ) ./\ ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) = ( ( Y .\/ Z ) ./\ ( X ./\ ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) ) ) |
| 50 | 19 15 11 48 49 | syl13anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( ( Y .\/ Z ) ./\ X ) ./\ ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) = ( ( Y .\/ Z ) ./\ ( X ./\ ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) ) ) |
| 51 | 50 | 3adant3 | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( ( ( Y .\/ Z ) ./\ X ) ./\ ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) = ( ( Y .\/ Z ) ./\ ( X ./\ ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) ) ) |
| 52 | 1 24 4 | cmt2N | |- ( ( K e. OML /\ X e. B /\ Y e. B ) -> ( X C Y <-> X C ( ( oc ` K ) ` Y ) ) ) |
| 53 | 52 | 3adant3r3 | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( X C Y <-> X C ( ( oc ` K ) ` Y ) ) ) |
| 54 | simpl | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> K e. OML ) |
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| 55 | 1 2 3 24 4 | cmtbr3N | |- ( ( K e. OML /\ X e. B /\ ( ( oc ` K ) ` Y ) e. B ) -> ( X C ( ( oc ` K ) ` Y ) <-> ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ) = ( X ./\ ( ( oc ` K ) ` Y ) ) ) ) |
| 56 | 54 11 40 55 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( X C ( ( oc ` K ) ` Y ) <-> ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ) = ( X ./\ ( ( oc ` K ) ` Y ) ) ) ) |
| 57 | 53 56 | bitrd | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( X C Y <-> ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ) = ( X ./\ ( ( oc ` K ) ` Y ) ) ) ) |
| 58 | 57 | biimpa | |- ( ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) /\ X C Y ) -> ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ) = ( X ./\ ( ( oc ` K ) ` Y ) ) ) |
| 59 | 58 | adantrr | |- ( ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) /\ ( X C Y /\ X C Z ) ) -> ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ) = ( X ./\ ( ( oc ` K ) ` Y ) ) ) |
| 60 | 59 | 3impa | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ) = ( X ./\ ( ( oc ` K ) ` Y ) ) ) |
| 61 | 1 24 4 | cmt2N | |- ( ( K e. OML /\ X e. B /\ Z e. B ) -> ( X C Z <-> X C ( ( oc ` K ) ` Z ) ) ) |
| 62 | 61 | 3adant3r2 | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( X C Z <-> X C ( ( oc ` K ) ` Z ) ) ) |
| 63 | 1 2 3 24 4 | cmtbr3N | |- ( ( K e. OML /\ X e. B /\ ( ( oc ` K ) ` Z ) e. B ) -> ( X C ( ( oc ` K ) ` Z ) <-> ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) = ( X ./\ ( ( oc ` K ) ` Z ) ) ) ) |
| 64 | 54 11 44 63 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( X C ( ( oc ` K ) ` Z ) <-> ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) = ( X ./\ ( ( oc ` K ) ` Z ) ) ) ) |
| 65 | 62 64 | bitrd | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( X C Z <-> ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) = ( X ./\ ( ( oc ` K ) ` Z ) ) ) ) |
| 66 | 65 | biimpa | |- ( ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) /\ X C Z ) -> ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) = ( X ./\ ( ( oc ` K ) ` Z ) ) ) |
| 67 | 66 | adantrl | |- ( ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) /\ ( X C Y /\ X C Z ) ) -> ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) = ( X ./\ ( ( oc ` K ) ` Z ) ) ) |
| 68 | 67 | 3impa | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) = ( X ./\ ( ( oc ` K ) ` Z ) ) ) |
| 69 | 60 68 | oveq12d | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ) ./\ ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) = ( ( X ./\ ( ( oc ` K ) ` Y ) ) ./\ ( X ./\ ( ( oc ` K ) ` Z ) ) ) ) |
| 70 | 1 3 | latmmdiN | |- ( ( K e. OL /\ ( X e. B /\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) e. B /\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) e. B ) ) -> ( X ./\ ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) = ( ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ) ./\ ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) ) |
| 71 | 19 11 42 46 70 | syl13anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( X ./\ ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) = ( ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ) ./\ ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) ) |
| 72 | 71 | 3adant3 | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( X ./\ ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) = ( ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ) ./\ ( X ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) ) |
| 73 | 1 3 | latmmdiN | |- ( ( K e. OL /\ ( X e. B /\ ( ( oc ` K ) ` Y ) e. B /\ ( ( oc ` K ) ` Z ) e. B ) ) -> ( X ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) = ( ( X ./\ ( ( oc ` K ) ` Y ) ) ./\ ( X ./\ ( ( oc ` K ) ` Z ) ) ) ) |
| 74 | 19 11 40 44 73 | syl13anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( X ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) = ( ( X ./\ ( ( oc ` K ) ` Y ) ) ./\ ( X ./\ ( ( oc ` K ) ` Z ) ) ) ) |
| 75 | 74 | 3adant3 | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( X ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) = ( ( X ./\ ( ( oc ` K ) ` Y ) ) ./\ ( X ./\ ( ( oc ` K ) ` Z ) ) ) ) |
| 76 | 69 72 75 | 3eqtr4d | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( X ./\ ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) = ( X ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) ) |
| 77 | 76 | oveq2d | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( ( Y .\/ Z ) ./\ ( X ./\ ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) ) = ( ( Y .\/ Z ) ./\ ( X ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) ) ) |
| 78 | 1 3 | latmcl | |- ( ( K e. Lat /\ ( ( oc ` K ) ` Y ) e. B /\ ( ( oc ` K ) ` Z ) e. B ) -> ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) e. B ) |
| 79 | 10 40 44 78 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) e. B ) |
| 80 | 1 3 | latm12 | |- ( ( K e. OL /\ ( ( Y .\/ Z ) e. B /\ X e. B /\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) e. B ) ) -> ( ( Y .\/ Z ) ./\ ( X ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) ) = ( X ./\ ( ( Y .\/ Z ) ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) ) ) |
| 81 | 19 15 11 79 80 | syl13anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( Y .\/ Z ) ./\ ( X ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) ) = ( X ./\ ( ( Y .\/ Z ) ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) ) ) |
| 82 | 81 | 3adant3 | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( ( Y .\/ Z ) ./\ ( X ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) ) = ( X ./\ ( ( Y .\/ Z ) ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) ) ) |
| 83 | 51 77 82 | 3eqtrd | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( ( ( Y .\/ Z ) ./\ X ) ./\ ( ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Y ) ) ./\ ( ( ( oc ` K ) ` X ) .\/ ( ( oc ` K ) ` Z ) ) ) ) = ( X ./\ ( ( Y .\/ Z ) ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) ) ) |
| 84 | 1 2 3 24 | oldmj1 | |- ( ( K e. OL /\ Y e. B /\ Z e. B ) -> ( ( oc ` K ) ` ( Y .\/ Z ) ) = ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) |
| 85 | 19 12 13 84 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( oc ` K ) ` ( Y .\/ Z ) ) = ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) |
| 86 | 85 | oveq2d | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( Y .\/ Z ) ./\ ( ( oc ` K ) ` ( Y .\/ Z ) ) ) = ( ( Y .\/ Z ) ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) ) |
| 87 | eqid | |- ( 0. ` K ) = ( 0. ` K ) |
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| 88 | 1 24 3 87 | opnoncon | |- ( ( K e. OP /\ ( Y .\/ Z ) e. B ) -> ( ( Y .\/ Z ) ./\ ( ( oc ` K ) ` ( Y .\/ Z ) ) ) = ( 0. ` K ) ) |
| 89 | 36 15 88 | syl2anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( Y .\/ Z ) ./\ ( ( oc ` K ) ` ( Y .\/ Z ) ) ) = ( 0. ` K ) ) |
| 90 | 86 89 | eqtr3d | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( Y .\/ Z ) ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) = ( 0. ` K ) ) |
| 91 | 90 | oveq2d | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( X ./\ ( ( Y .\/ Z ) ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) ) = ( X ./\ ( 0. ` K ) ) ) |
| 92 | 1 3 87 | olm01 | |- ( ( K e. OL /\ X e. B ) -> ( X ./\ ( 0. ` K ) ) = ( 0. ` K ) ) |
| 93 | 19 11 92 | syl2anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( X ./\ ( 0. ` K ) ) = ( 0. ` K ) ) |
| 94 | 91 93 | eqtrd | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( X ./\ ( ( Y .\/ Z ) ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) ) = ( 0. ` K ) ) |
| 95 | 94 | 3adant3 | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( X ./\ ( ( Y .\/ Z ) ./\ ( ( ( oc ` K ) ` Y ) ./\ ( ( oc ` K ) ` Z ) ) ) ) = ( 0. ` K ) ) |
| 96 | 34 83 95 | 3eqtrd | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( ( X ./\ ( Y .\/ Z ) ) ./\ ( ( oc ` K ) ` ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ) ) = ( 0. ` K ) ) |
| 97 | 1 2 | latjcl | |- ( ( K e. Lat /\ ( X ./\ Y ) e. B /\ ( X ./\ Z ) e. B ) -> ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) e. B ) |
| 98 | 10 21 23 97 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) e. B ) |
| 99 | 1 3 | latmcl | |- ( ( K e. Lat /\ X e. B /\ ( Y .\/ Z ) e. B ) -> ( X ./\ ( Y .\/ Z ) ) e. B ) |
| 100 | 10 11 15 99 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( X ./\ ( Y .\/ Z ) ) e. B ) |
| 101 | 1 6 3 24 87 | omllaw3 | |- ( ( K e. OML /\ ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) e. B /\ ( X ./\ ( Y .\/ Z ) ) e. B ) -> ( ( ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ( le ` K ) ( X ./\ ( Y .\/ Z ) ) /\ ( ( X ./\ ( Y .\/ Z ) ) ./\ ( ( oc ` K ) ` ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ) ) = ( 0. ` K ) ) -> ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) = ( X ./\ ( Y .\/ Z ) ) ) ) |
| 102 | 54 98 100 101 | syl3anc | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ( le ` K ) ( X ./\ ( Y .\/ Z ) ) /\ ( ( X ./\ ( Y .\/ Z ) ) ./\ ( ( oc ` K ) ` ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ) ) = ( 0. ` K ) ) -> ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) = ( X ./\ ( Y .\/ Z ) ) ) ) |
| 103 | 102 | 3adant3 | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( ( ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ( le ` K ) ( X ./\ ( Y .\/ Z ) ) /\ ( ( X ./\ ( Y .\/ Z ) ) ./\ ( ( oc ` K ) ` ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ) ) = ( 0. ` K ) ) -> ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) = ( X ./\ ( Y .\/ Z ) ) ) ) |
| 104 | 9 96 103 | mp2and | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) = ( X ./\ ( Y .\/ Z ) ) ) |
| 105 | 104 | eqcomd | |- ( ( K e. OML /\ ( X e. B /\ Y e. B /\ Z e. B ) /\ ( X C Y /\ X C Z ) ) -> ( X ./\ ( Y .\/ Z ) ) = ( ( X ./\ Y ) .\/ ( X ./\ Z ) ) ) |