Theorem latledi 17698

Description: An ortholattice is distributive in one ordering direction. (ledi 29316 analog.) (Contributed by NM, 7-Nov-2011.)

Hypotheses

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

Assertion

Ref	Expression
latledi	⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ≤ (𝑋 ∧ (𝑌 ∨ 𝑍)))

Proof of Theorem latledi

Step	Hyp	Ref	Expression
1		latledi.b	. . . . 5 ⊢ 𝐵 = (Base‘𝐾)
2		latledi.l	. . . . 5 ⊢ ≤ = (le‘𝐾)
3		latledi.m	. . . . 5 ⊢ ∧ = (meet‘𝐾)
4	1, 2, 3	latmle1 17685	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ∧ 𝑌) ≤ 𝑋)
5	4	3adant3r3 1180	. . 3 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 ∧ 𝑌) ≤ 𝑋)
6	1, 2, 3	latmle1 17685	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑋 ∧ 𝑍) ≤ 𝑋)
7	6	3adant3r2 1179	. . 3 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 ∧ 𝑍) ≤ 𝑋)
8	1, 3	latmcl 17661	. . . . . 6 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ∧ 𝑌) ∈ 𝐵)
9	8	3adant3r3 1180	. . . . 5 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 ∧ 𝑌) ∈ 𝐵)
10	1, 3	latmcl 17661	. . . . . 6 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑋 ∧ 𝑍) ∈ 𝐵)
11	10	3adant3r2 1179	. . . . 5 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 ∧ 𝑍) ∈ 𝐵)
12		simpr1 1190	. . . . 5 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → 𝑋 ∈ 𝐵)
13	9, 11, 12	3jca 1124	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 ∧ 𝑌) ∈ 𝐵 ∧ (𝑋 ∧ 𝑍) ∈ 𝐵 ∧ 𝑋 ∈ 𝐵))
14		latledi.j	. . . . 5 ⊢ ∨ = (join‘𝐾)
15	1, 2, 14	latjle12 17671	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ ((𝑋 ∧ 𝑌) ∈ 𝐵 ∧ (𝑋 ∧ 𝑍) ∈ 𝐵 ∧ 𝑋 ∈ 𝐵)) → (((𝑋 ∧ 𝑌) ≤ 𝑋 ∧ (𝑋 ∧ 𝑍) ≤ 𝑋) ↔ ((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ≤ 𝑋))
16	13, 15	syldan 593	. . 3 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (((𝑋 ∧ 𝑌) ≤ 𝑋 ∧ (𝑋 ∧ 𝑍) ≤ 𝑋) ↔ ((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ≤ 𝑋))
17	5, 7, 16	mpbi2and 710	. 2 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ≤ 𝑋)
18	1, 2, 3	latmle2 17686	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ∧ 𝑌) ≤ 𝑌)
19	18	3adant3r3 1180	. . 3 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 ∧ 𝑌) ≤ 𝑌)
20	1, 2, 3	latmle2 17686	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑋 ∧ 𝑍) ≤ 𝑍)
21	20	3adant3r2 1179	. . 3 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 ∧ 𝑍) ≤ 𝑍)
22		simpl 485	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → 𝐾 ∈ Lat)
23		simpr2 1191	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → 𝑌 ∈ 𝐵)
24		simpr3 1192	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → 𝑍 ∈ 𝐵)
25	1, 2, 14	latjlej12 17676	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ ((𝑋 ∧ 𝑌) ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ ((𝑋 ∧ 𝑍) ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (((𝑋 ∧ 𝑌) ≤ 𝑌 ∧ (𝑋 ∧ 𝑍) ≤ 𝑍) → ((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ≤ (𝑌 ∨ 𝑍)))
26	22, 9, 23, 11, 24, 25	syl122anc 1375	. . 3 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (((𝑋 ∧ 𝑌) ≤ 𝑌 ∧ (𝑋 ∧ 𝑍) ≤ 𝑍) → ((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ≤ (𝑌 ∨ 𝑍)))
27	19, 21, 26	mp2and 697	. 2 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ≤ (𝑌 ∨ 𝑍))
28	1, 14	latjcl 17660	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∧ 𝑌) ∈ 𝐵 ∧ (𝑋 ∧ 𝑍) ∈ 𝐵) → ((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ∈ 𝐵)
29	22, 9, 11, 28	syl3anc 1367	. . 3 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ∈ 𝐵)
30	1, 14	latjcl 17660	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → (𝑌 ∨ 𝑍) ∈ 𝐵)
31	30	3adant3r1 1178	. . 3 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑌 ∨ 𝑍) ∈ 𝐵)
32	1, 2, 3	latlem12 17687	. . 3 ⊢ ((𝐾 ∈ Lat ∧ (((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ∈ 𝐵 ∧ 𝑋 ∈ 𝐵 ∧ (𝑌 ∨ 𝑍) ∈ 𝐵)) → ((((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ≤ 𝑋 ∧ ((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ≤ (𝑌 ∨ 𝑍)) ↔ ((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ≤ (𝑋 ∧ (𝑌 ∨ 𝑍))))
33	22, 29, 12, 31, 32	syl13anc 1368	. 2 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ≤ 𝑋 ∧ ((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ≤ (𝑌 ∨ 𝑍)) ↔ ((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ≤ (𝑋 ∧ (𝑌 ∨ 𝑍))))
34	17, 27, 33	mpbi2and 710	1 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 ∧ 𝑌) ∨ (𝑋 ∧ 𝑍)) ≤ (𝑋 ∧ (𝑌 ∨ 𝑍)))

Syntax hints:   → wi 4   ↔ wb 208   ∧ wa 398   ∧ w3a 1083   = wceq 1533   ∈ wcel 2110   class class class wbr 5065  ‘cfv 6354  (class class class)co 7155  Basecbs 16482  lecple 16571  joincjn 17553  meetcmee 17554  Latclat 17654

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2157  ax-12 2173  ax-ext 2793  ax-rep 5189  ax-sep 5202  ax-nul 5209  ax-pow 5265  ax-pr 5329  ax-un 7460

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-reu 3145  df-rab 3147  df-v 3496  df-sbc 3772  df-csb 3883  df-dif 3938  df-un 3940  df-in 3942  df-ss 3951  df-nul 4291  df-if 4467  df-pw 4540  df-sn 4567  df-pr 4569  df-op 4573  df-uni 4838  df-iun 4920  df-br 5066  df-opab 5128  df-mpt 5146  df-id 5459  df-xp 5560  df-rel 5561  df-cnv 5562  df-co 5563  df-dm 5564  df-rn 5565  df-res 5566  df-ima 5567  df-iota 6313  df-fun 6356  df-fn 6357  df-f 6358  df-f1 6359  df-fo 6360  df-f1o 6361  df-fv 6362  df-riota 7113  df-ov 7158  df-oprab 7159  df-poset 17555  df-lub 17583  df-glb 17584  df-join 17585  df-meet 17586  df-lat 17655

This theorem is referenced by:  omlfh1N  36393