Theorem pmodN 36988

Description: The modular law for projective subspaces. (Contributed by NM, 26-Mar-2012.) (New usage is discouraged.)

Hypotheses

Ref	Expression
pmod.a	⊢ 𝐴 = (Atoms‘𝐾)
pmod.s	⊢ 𝑆 = (PSubSp‘𝐾)
pmod.p	⊢ + = (+𝑃‘𝐾)

Assertion

Ref	Expression
pmodN	⊢ ((𝐾 ∈ HL ∧ (𝑋 ∈ 𝑆 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑍 ⊆ 𝐴)) → (𝑋 ∩ (𝑌 + (𝑋 ∩ 𝑍))) = ((𝑋 ∩ 𝑌) + (𝑋 ∩ 𝑍)))

Proof of Theorem pmodN

Step	Hyp	Ref	Expression
1		incom 4180	. 2 ⊢ (𝑋 ∩ ((𝑋 ∩ 𝑍) + 𝑌)) = (((𝑋 ∩ 𝑍) + 𝑌) ∩ 𝑋)
2		hllat 36501	. . . . 5 ⊢ (𝐾 ∈ HL → 𝐾 ∈ Lat)
3	2	adantr 483	. . . 4 ⊢ ((𝐾 ∈ HL ∧ (𝑋 ∈ 𝑆 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑍 ⊆ 𝐴)) → 𝐾 ∈ Lat)
4		simpr2 1191	. . . 4 ⊢ ((𝐾 ∈ HL ∧ (𝑋 ∈ 𝑆 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑍 ⊆ 𝐴)) → 𝑌 ⊆ 𝐴)
5		inss2 4208	. . . . 5 ⊢ (𝑋 ∩ 𝑍) ⊆ 𝑍
6		simpr3 1192	. . . . 5 ⊢ ((𝐾 ∈ HL ∧ (𝑋 ∈ 𝑆 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑍 ⊆ 𝐴)) → 𝑍 ⊆ 𝐴)
7	5, 6	sstrid 3980	. . . 4 ⊢ ((𝐾 ∈ HL ∧ (𝑋 ∈ 𝑆 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑍 ⊆ 𝐴)) → (𝑋 ∩ 𝑍) ⊆ 𝐴)
8		pmod.a	. . . . 5 ⊢ 𝐴 = (Atoms‘𝐾)
9		pmod.p	. . . . 5 ⊢ + = (+𝑃‘𝐾)
10	8, 9	paddcom 36951	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ 𝑌 ⊆ 𝐴 ∧ (𝑋 ∩ 𝑍) ⊆ 𝐴) → (𝑌 + (𝑋 ∩ 𝑍)) = ((𝑋 ∩ 𝑍) + 𝑌))
11	3, 4, 7, 10	syl3anc 1367	. . 3 ⊢ ((𝐾 ∈ HL ∧ (𝑋 ∈ 𝑆 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑍 ⊆ 𝐴)) → (𝑌 + (𝑋 ∩ 𝑍)) = ((𝑋 ∩ 𝑍) + 𝑌))
12	11	ineq2d 4191	. 2 ⊢ ((𝐾 ∈ HL ∧ (𝑋 ∈ 𝑆 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑍 ⊆ 𝐴)) → (𝑋 ∩ (𝑌 + (𝑋 ∩ 𝑍))) = (𝑋 ∩ ((𝑋 ∩ 𝑍) + 𝑌)))
13		incom 4180	. . . 4 ⊢ (𝑋 ∩ 𝑌) = (𝑌 ∩ 𝑋)
14	13	oveq2i 7169	. . 3 ⊢ ((𝑋 ∩ 𝑍) + (𝑋 ∩ 𝑌)) = ((𝑋 ∩ 𝑍) + (𝑌 ∩ 𝑋))
15		inss2 4208	. . . . 5 ⊢ (𝑋 ∩ 𝑌) ⊆ 𝑌
16	15, 4	sstrid 3980	. . . 4 ⊢ ((𝐾 ∈ HL ∧ (𝑋 ∈ 𝑆 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑍 ⊆ 𝐴)) → (𝑋 ∩ 𝑌) ⊆ 𝐴)
17	8, 9	paddcom 36951	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∩ 𝑌) ⊆ 𝐴 ∧ (𝑋 ∩ 𝑍) ⊆ 𝐴) → ((𝑋 ∩ 𝑌) + (𝑋 ∩ 𝑍)) = ((𝑋 ∩ 𝑍) + (𝑋 ∩ 𝑌)))
18	3, 16, 7, 17	syl3anc 1367	. . 3 ⊢ ((𝐾 ∈ HL ∧ (𝑋 ∈ 𝑆 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑍 ⊆ 𝐴)) → ((𝑋 ∩ 𝑌) + (𝑋 ∩ 𝑍)) = ((𝑋 ∩ 𝑍) + (𝑋 ∩ 𝑌)))
19		simpr1 1190	. . . . 5 ⊢ ((𝐾 ∈ HL ∧ (𝑋 ∈ 𝑆 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑍 ⊆ 𝐴)) → 𝑋 ∈ 𝑆)
20	7, 4, 19	3jca 1124	. . . 4 ⊢ ((𝐾 ∈ HL ∧ (𝑋 ∈ 𝑆 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑍 ⊆ 𝐴)) → ((𝑋 ∩ 𝑍) ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑋 ∈ 𝑆))
21		inss1 4207	. . . . 5 ⊢ (𝑋 ∩ 𝑍) ⊆ 𝑋
22		pmod.s	. . . . . 6 ⊢ 𝑆 = (PSubSp‘𝐾)
23	8, 22, 9	pmod1i 36986	. . . . 5 ⊢ ((𝐾 ∈ HL ∧ ((𝑋 ∩ 𝑍) ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑋 ∈ 𝑆)) → ((𝑋 ∩ 𝑍) ⊆ 𝑋 → (((𝑋 ∩ 𝑍) + 𝑌) ∩ 𝑋) = ((𝑋 ∩ 𝑍) + (𝑌 ∩ 𝑋))))
24	21, 23	mpi 20	. . . 4 ⊢ ((𝐾 ∈ HL ∧ ((𝑋 ∩ 𝑍) ⊆ 𝐴 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑋 ∈ 𝑆)) → (((𝑋 ∩ 𝑍) + 𝑌) ∩ 𝑋) = ((𝑋 ∩ 𝑍) + (𝑌 ∩ 𝑋)))
25	20, 24	syldan 593	. . 3 ⊢ ((𝐾 ∈ HL ∧ (𝑋 ∈ 𝑆 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑍 ⊆ 𝐴)) → (((𝑋 ∩ 𝑍) + 𝑌) ∩ 𝑋) = ((𝑋 ∩ 𝑍) + (𝑌 ∩ 𝑋)))
26	14, 18, 25	3eqtr4a 2884	. 2 ⊢ ((𝐾 ∈ HL ∧ (𝑋 ∈ 𝑆 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑍 ⊆ 𝐴)) → ((𝑋 ∩ 𝑌) + (𝑋 ∩ 𝑍)) = (((𝑋 ∩ 𝑍) + 𝑌) ∩ 𝑋))
27	1, 12, 26	3eqtr4a 2884	1 ⊢ ((𝐾 ∈ HL ∧ (𝑋 ∈ 𝑆 ∧ 𝑌 ⊆ 𝐴 ∧ 𝑍 ⊆ 𝐴)) → (𝑋 ∩ (𝑌 + (𝑋 ∩ 𝑍))) = ((𝑋 ∩ 𝑌) + (𝑋 ∩ 𝑍)))

Syntax hints:   → wi 4   ∧ wa 398   ∧ w3a 1083   = wceq 1537   ∈ wcel 2114   ∩ cin 3937   ⊆ wss 3938  ‘cfv 6357  (class class class)co 7158  Latclat 17657  Atomscatm 36401  HLchlt 36488  PSubSpcpsubsp 36634  +_𝑃cpadd 36933

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-rep 5192  ax-sep 5205  ax-nul 5212  ax-pow 5268  ax-pr 5332  ax-un 7463

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ne 3019  df-ral 3145  df-rex 3146  df-reu 3147  df-rab 3149  df-v 3498  df-sbc 3775  df-csb 3886  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-nul 4294  df-if 4470  df-pw 4543  df-sn 4570  df-pr 4572  df-op 4576  df-uni 4841  df-iun 4923  df-br 5069  df-opab 5131  df-mpt 5149  df-id 5462  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-res 5569  df-ima 5570  df-iota 6316  df-fun 6359  df-fn 6360  df-f 6361  df-f1 6362  df-fo 6363  df-f1o 6364  df-fv 6365  df-riota 7116  df-ov 7161  df-oprab 7162  df-mpo 7163  df-1st 7691  df-2nd 7692  df-proset 17540  df-poset 17558  df-plt 17570  df-lub 17586  df-glb 17587  df-join 17588  df-meet 17589  df-p0 17651  df-lat 17658  df-covers 36404  df-ats 36405  df-atl 36436  df-cvlat 36460  df-hlat 36489  df-psubsp 36641  df-padd 36934

This theorem is referenced by: (None)