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Theorem cmt2N 35227
Description: Commutation with orthocomplement. Theorem 2.3(i) of [Beran] p. 39. (cmcm2i 28929 analog.) (Contributed by NM, 8-Nov-2011.) (New usage is discouraged.)
Hypotheses
Ref Expression
cmt2.b 𝐵 = (Base‘𝐾)
cmt2.o = (oc‘𝐾)
cmt2.c 𝐶 = (cm‘𝐾)
Assertion
Ref Expression
cmt2N ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → (𝑋𝐶𝑌𝑋𝐶( 𝑌)))

Proof of Theorem cmt2N
StepHypRef Expression
1 omllat 35219 . . . . . 6 (𝐾 ∈ OML → 𝐾 ∈ Lat)
213ad2ant1 1163 . . . . 5 ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → 𝐾 ∈ Lat)
3 cmt2.b . . . . . . 7 𝐵 = (Base‘𝐾)
4 eqid 2765 . . . . . . 7 (meet‘𝐾) = (meet‘𝐾)
53, 4latmcl 17332 . . . . . 6 ((𝐾 ∈ Lat ∧ 𝑋𝐵𝑌𝐵) → (𝑋(meet‘𝐾)𝑌) ∈ 𝐵)
61, 5syl3an1 1202 . . . . 5 ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → (𝑋(meet‘𝐾)𝑌) ∈ 𝐵)
7 simp2 1167 . . . . . 6 ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → 𝑋𝐵)
8 omlop 35218 . . . . . . . 8 (𝐾 ∈ OML → 𝐾 ∈ OP)
983ad2ant1 1163 . . . . . . 7 ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → 𝐾 ∈ OP)
10 simp3 1168 . . . . . . 7 ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → 𝑌𝐵)
11 cmt2.o . . . . . . . 8 = (oc‘𝐾)
123, 11opoccl 35171 . . . . . . 7 ((𝐾 ∈ OP ∧ 𝑌𝐵) → ( 𝑌) ∈ 𝐵)
139, 10, 12syl2anc 579 . . . . . 6 ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → ( 𝑌) ∈ 𝐵)
143, 4latmcl 17332 . . . . . 6 ((𝐾 ∈ Lat ∧ 𝑋𝐵 ∧ ( 𝑌) ∈ 𝐵) → (𝑋(meet‘𝐾)( 𝑌)) ∈ 𝐵)
152, 7, 13, 14syl3anc 1490 . . . . 5 ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → (𝑋(meet‘𝐾)( 𝑌)) ∈ 𝐵)
16 eqid 2765 . . . . . 6 (join‘𝐾) = (join‘𝐾)
173, 16latjcom 17339 . . . . 5 ((𝐾 ∈ Lat ∧ (𝑋(meet‘𝐾)𝑌) ∈ 𝐵 ∧ (𝑋(meet‘𝐾)( 𝑌)) ∈ 𝐵) → ((𝑋(meet‘𝐾)𝑌)(join‘𝐾)(𝑋(meet‘𝐾)( 𝑌))) = ((𝑋(meet‘𝐾)( 𝑌))(join‘𝐾)(𝑋(meet‘𝐾)𝑌)))
182, 6, 15, 17syl3anc 1490 . . . 4 ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → ((𝑋(meet‘𝐾)𝑌)(join‘𝐾)(𝑋(meet‘𝐾)( 𝑌))) = ((𝑋(meet‘𝐾)( 𝑌))(join‘𝐾)(𝑋(meet‘𝐾)𝑌)))
193, 11opococ 35172 . . . . . . 7 ((𝐾 ∈ OP ∧ 𝑌𝐵) → ( ‘( 𝑌)) = 𝑌)
209, 10, 19syl2anc 579 . . . . . 6 ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → ( ‘( 𝑌)) = 𝑌)
2120oveq2d 6862 . . . . 5 ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → (𝑋(meet‘𝐾)( ‘( 𝑌))) = (𝑋(meet‘𝐾)𝑌))
2221oveq2d 6862 . . . 4 ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → ((𝑋(meet‘𝐾)( 𝑌))(join‘𝐾)(𝑋(meet‘𝐾)( ‘( 𝑌)))) = ((𝑋(meet‘𝐾)( 𝑌))(join‘𝐾)(𝑋(meet‘𝐾)𝑌)))
2318, 22eqtr4d 2802 . . 3 ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → ((𝑋(meet‘𝐾)𝑌)(join‘𝐾)(𝑋(meet‘𝐾)( 𝑌))) = ((𝑋(meet‘𝐾)( 𝑌))(join‘𝐾)(𝑋(meet‘𝐾)( ‘( 𝑌)))))
2423eqeq2d 2775 . 2 ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → (𝑋 = ((𝑋(meet‘𝐾)𝑌)(join‘𝐾)(𝑋(meet‘𝐾)( 𝑌))) ↔ 𝑋 = ((𝑋(meet‘𝐾)( 𝑌))(join‘𝐾)(𝑋(meet‘𝐾)( ‘( 𝑌))))))
25 cmt2.c . . 3 𝐶 = (cm‘𝐾)
263, 16, 4, 11, 25cmtvalN 35188 . 2 ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → (𝑋𝐶𝑌𝑋 = ((𝑋(meet‘𝐾)𝑌)(join‘𝐾)(𝑋(meet‘𝐾)( 𝑌)))))
273, 16, 4, 11, 25cmtvalN 35188 . . 3 ((𝐾 ∈ OML ∧ 𝑋𝐵 ∧ ( 𝑌) ∈ 𝐵) → (𝑋𝐶( 𝑌) ↔ 𝑋 = ((𝑋(meet‘𝐾)( 𝑌))(join‘𝐾)(𝑋(meet‘𝐾)( ‘( 𝑌))))))
2813, 27syld3an3 1528 . 2 ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → (𝑋𝐶( 𝑌) ↔ 𝑋 = ((𝑋(meet‘𝐾)( 𝑌))(join‘𝐾)(𝑋(meet‘𝐾)( ‘( 𝑌))))))
2924, 26, 283bitr4d 302 1 ((𝐾 ∈ OML ∧ 𝑋𝐵𝑌𝐵) → (𝑋𝐶𝑌𝑋𝐶( 𝑌)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 197  w3a 1107   = wceq 1652  wcel 2155   class class class wbr 4811  cfv 6070  (class class class)co 6846  Basecbs 16144  occoc 16236  joincjn 17224  meetcmee 17225  Latclat 17325  OPcops 35149  cmccmtN 35150  OMLcoml 35152
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1890  ax-4 1904  ax-5 2005  ax-6 2070  ax-7 2105  ax-8 2157  ax-9 2164  ax-10 2183  ax-11 2198  ax-12 2211  ax-13 2352  ax-ext 2743  ax-rep 4932  ax-sep 4943  ax-nul 4951  ax-pow 5003  ax-pr 5064  ax-un 7151
This theorem depends on definitions:  df-bi 198  df-an 385  df-or 874  df-3an 1109  df-tru 1656  df-ex 1875  df-nf 1879  df-sb 2063  df-mo 2565  df-eu 2582  df-clab 2752  df-cleq 2758  df-clel 2761  df-nfc 2896  df-ne 2938  df-ral 3060  df-rex 3061  df-reu 3062  df-rab 3064  df-v 3352  df-sbc 3599  df-csb 3694  df-dif 3737  df-un 3739  df-in 3741  df-ss 3748  df-nul 4082  df-if 4246  df-pw 4319  df-sn 4337  df-pr 4339  df-op 4343  df-uni 4597  df-iun 4680  df-br 4812  df-opab 4874  df-mpt 4891  df-id 5187  df-xp 5285  df-rel 5286  df-cnv 5287  df-co 5288  df-dm 5289  df-rn 5290  df-res 5291  df-ima 5292  df-iota 6033  df-fun 6072  df-fn 6073  df-f 6074  df-f1 6075  df-fo 6076  df-f1o 6077  df-fv 6078  df-riota 6807  df-ov 6849  df-oprab 6850  df-lub 17254  df-glb 17255  df-join 17256  df-meet 17257  df-lat 17326  df-oposet 35153  df-cmtN 35154  df-ol 35155  df-oml 35156
This theorem is referenced by:  cmt3N  35228  cmt4N  35229  omlfh1N  35235
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