Theorem dihmeetlem5 41815

Description: Part of proof that isomorphism H is order-preserving . (Contributed by NM, 6-Apr-2014.)

Hypotheses

Ref	Expression
dihmeetlem5.b	⊢ 𝐵 = (Base‘𝐾)
dihmeetlem5.l	⊢ ≤ = (le‘𝐾)
dihmeetlem5.j	⊢ ∨ = (join‘𝐾)
dihmeetlem5.m	⊢ ∧ = (meet‘𝐾)
dihmeetlem5.a	⊢ 𝐴 = (Atoms‘𝐾)

Assertion

Ref	Expression
dihmeetlem5	⊢ (((𝐾 ∈ HL ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (𝑄 ∈ 𝐴 ∧ 𝑄 ≤ 𝑋)) → (𝑋 ∧ (𝑌 ∨ 𝑄)) = ((𝑋 ∧ 𝑌) ∨ 𝑄))

Proof of Theorem dihmeetlem5

Step	Hyp	Ref	Expression
1		simpl1 1199	. . 3 ⊢ (((𝐾 ∈ HL ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (𝑄 ∈ 𝐴 ∧ 𝑄 ≤ 𝑋)) → 𝐾 ∈ HL)
2		simprl 777	. . 3 ⊢ (((𝐾 ∈ HL ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (𝑄 ∈ 𝐴 ∧ 𝑄 ≤ 𝑋)) → 𝑄 ∈ 𝐴)
3		simpl2 1200	. . 3 ⊢ (((𝐾 ∈ HL ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (𝑄 ∈ 𝐴 ∧ 𝑄 ≤ 𝑋)) → 𝑋 ∈ 𝐵)
4		simpl3 1201	. . 3 ⊢ (((𝐾 ∈ HL ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (𝑄 ∈ 𝐴 ∧ 𝑄 ≤ 𝑋)) → 𝑌 ∈ 𝐵)
5		simprr 779	. . 3 ⊢ (((𝐾 ∈ HL ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (𝑄 ∈ 𝐴 ∧ 𝑄 ≤ 𝑋)) → 𝑄 ≤ 𝑋)
6		dihmeetlem5.b	. . . 4 ⊢ 𝐵 = (Base‘𝐾)
7		dihmeetlem5.l	. . . 4 ⊢ ≤ = (le‘𝐾)
8		dihmeetlem5.j	. . . 4 ⊢ ∨ = (join‘𝐾)
9		dihmeetlem5.m	. . . 4 ⊢ ∧ = (meet‘𝐾)
10		dihmeetlem5.a	. . . 4 ⊢ 𝐴 = (Atoms‘𝐾)
11	6, 7, 8, 9, 10	atmod2i1 40368	. . 3 ⊢ ((𝐾 ∈ HL ∧ (𝑄 ∈ 𝐴 ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ 𝑄 ≤ 𝑋) → ((𝑋 ∧ 𝑌) ∨ 𝑄) = (𝑋 ∧ (𝑌 ∨ 𝑄)))
12	1, 2, 3, 4, 5, 11	syl131anc 1392	. 2 ⊢ (((𝐾 ∈ HL ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (𝑄 ∈ 𝐴 ∧ 𝑄 ≤ 𝑋)) → ((𝑋 ∧ 𝑌) ∨ 𝑄) = (𝑋 ∧ (𝑌 ∨ 𝑄)))
13	12	eqcomd 2747	1 ⊢ (((𝐾 ∈ HL ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (𝑄 ∈ 𝐴 ∧ 𝑄 ≤ 𝑋)) → (𝑋 ∧ (𝑌 ∨ 𝑄)) = ((𝑋 ∧ 𝑌) ∨ 𝑄))

Syntax hints:   → wi 4   ∧ wa 397   ∧ w3a 1093   = wceq 1548   ∈ wcel 2121   class class class wbr 5075  ‘cfv 6489  (class class class)co 7360  Basecbs 17174  lecple 17222  joincjn 18272  meetcmee 18273  Atomscatm 39770  HLchlt 39857

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1803  ax-4 1817  ax-5 1918  ax-6 1975  ax-7 2016  ax-8 2123  ax-9 2131  ax-10 2154  ax-11 2170  ax-12 2191  ax-ext 2713  ax-rep 5202  ax-sep 5221  ax-nul 5231  ax-pow 5297  ax-pr 5365  ax-un 7682

This theorem depends on definitions:  df-bi 209  df-an 398  df-or 855  df-3an 1095  df-tru 1551  df-fal 1561  df-ex 1788  df-nf 1792  df-sb 2075  df-mo 2545  df-eu 2575  df-clab 2720  df-cleq 2733  df-clel 2816  df-nfc 2890  df-ne 2937  df-ral 3056  df-rex 3066  df-rmo 3346  df-reu 3347  df-rab 3394  df-v 3435  df-sbc 3726  df-csb 3834  df-dif 3888  df-un 3890  df-in 3892  df-ss 3902  df-nul 4265  df-if 4458  df-pw 4534  df-sn 4559  df-pr 4561  df-op 4565  df-uni 4842  df-iun 4926  df-iin 4927  df-br 5076  df-opab 5138  df-mpt 5157  df-id 5516  df-xp 5627  df-rel 5628  df-cnv 5629  df-co 5630  df-dm 5631  df-rn 5632  df-res 5633  df-ima 5634  df-iota 6445  df-fun 6491  df-fn 6492  df-f 6493  df-f1 6494  df-fo 6495  df-f1o 6496  df-fv 6497  df-riota 7317  df-ov 7363  df-oprab 7364  df-mpo 7365  df-1st 7935  df-2nd 7936  df-proset 18255  df-poset 18274  df-plt 18289  df-lub 18305  df-glb 18306  df-join 18307  df-meet 18308  df-p0 18384  df-lat 18393  df-clat 18460  df-oposet 39683  df-ol 39685  df-oml 39686  df-covers 39773  df-ats 39774  df-atl 39805  df-cvlat 39829  df-hlat 39858  df-psubsp 40010  df-pmap 40011  df-padd 40303

This theorem is referenced by:  dihmeetlem6  41816  dihjatc1  41818  dihmeetlem10N  41823