Theorem hlexch4N 40369

Description: A Hilbert lattice has the exchange property. Part of Definition 7.8 of [MaedaMaeda] p. 32. (Contributed by NM, 15-Nov-2011.) (New usage is discouraged.)

Hypotheses

Ref	Expression
hlexch3.b	⊢ 𝐵 = (Base‘𝐾)
hlexch3.l	⊢ ≤ = (le‘𝐾)
hlexch3.j	⊢ ∨ = (join‘𝐾)
hlexch3.m	⊢ ∧ = (meet‘𝐾)
hlexch3.z	⊢ 0 = (0.‘𝐾)
hlexch3.a	⊢ 𝐴 = (Atoms‘𝐾)

Assertion

Ref	Expression
hlexch4N	⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑋 ∈ 𝐵) ∧ (𝑃 ∧ 𝑋) = 0 ) → (𝑃 ≤ (𝑋 ∨ 𝑄) ↔ (𝑋 ∨ 𝑃) = (𝑋 ∨ 𝑄)))

Proof of Theorem hlexch4N

Step	Hyp	Ref	Expression
1		hlcvl 40336	. 2 ⊢ (𝐾 ∈ HL → 𝐾 ∈ CvLat)
2		hlexch3.b	. . 3 ⊢ 𝐵 = (Base‘𝐾)
3		hlexch3.l	. . 3 ⊢ ≤ = (le‘𝐾)
4		hlexch3.j	. . 3 ⊢ ∨ = (join‘𝐾)
5		hlexch3.m	. . 3 ⊢ ∧ = (meet‘𝐾)
6		hlexch3.z	. . 3 ⊢ 0 = (0.‘𝐾)
7		hlexch3.a	. . 3 ⊢ 𝐴 = (Atoms‘𝐾)
8	2, 3, 4, 5, 6, 7	cvlexch4N 40310	. 2 ⊢ ((𝐾 ∈ CvLat ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑋 ∈ 𝐵) ∧ (𝑃 ∧ 𝑋) = 0 ) → (𝑃 ≤ (𝑋 ∨ 𝑄) ↔ (𝑋 ∨ 𝑃) = (𝑋 ∨ 𝑄)))
9	1, 8	syl3an1 1181	1 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑋 ∈ 𝐵) ∧ (𝑃 ∧ 𝑋) = 0 ) → (𝑃 ≤ (𝑋 ∨ 𝑄) ↔ (𝑋 ∨ 𝑃) = (𝑋 ∨ 𝑄)))

This proof depends on syntax axioms:   → wi 4   ↔ wb 209   ∧ w3a 1103   = wceq 1570   ∈ wcel 2145   class class class wbr 5102  ‘cfv 6527  (class class class)co 7408  Basecbs 17348  lecple 17396  joincjn 18446  meetcmee 18447  0.cp0 18556  Atomscatm 40240  CvLatclc 40242  HLchlt 40327

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2213  ax-ext 2732  ax-rep 5231  ax-sep 5248  ax-nul 5259  ax-pow 5326  ax-pr 5390  ax-un 7734

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ne 2956  df-ral 3077  df-rex 3087  df-rmo 3365  df-reu 3366  df-rab 3413  df-v 3452  df-sbc 3739  df-csb 3847  df-dif 3901  df-un 3903  df-in 3905  df-ss 3915  df-nul 4279  df-if 4482  df-pw 4558  df-sn 4584  df-pr 4586  df-op 4590  df-uni 4867  df-iun 4952  df-br 5103  df-opab 5167  df-mpt 5186  df-id 5542  df-xp 5653  df-rel 5654  df-cnv 5655  df-co 5656  df-dm 5657  df-rn 5658  df-res 5659  df-ima 5660  df-iota 6483  df-fun 6529  df-fn 6530  df-f 6531  df-f1 6532  df-fo 6533  df-f1o 6534  df-fv 6535  df-riota 7365  df-ov 7411  df-oprab 7412  df-proset 18429  df-poset 18448  df-plt 18463  df-lub 18479  df-glb 18480  df-join 18481  df-meet 18482  df-p0 18558  df-lat 18567  df-covers 40243  df-ats 40244  df-atl 40275  df-cvlat 40299  df-hlat 40328

This theorem is used by: (None)