Theorem hlatmstcOLDN 40273

Description: An atomic, complete, orthomodular lattice is atomistic i.e. every element is the join of the atoms under it. See remark before Proposition 1 in [Kalmbach] p. 140; also remark in [BeltramettiCassinelli] p. 98. (hatomistici 32846 analog.) (Contributed by NM, 21-Oct-2011.) (New usage is discouraged.)

Hypotheses

Ref	Expression
hlatmstc.b	⊢ 𝐵 = (Base‘𝐾)
hlatmstc.l	⊢ ≤ = (le‘𝐾)
hlatmstc.u	⊢ 𝑈 = (lub‘𝐾)
hlatmstc.a	⊢ 𝐴 = (Atoms‘𝐾)

Assertion

Ref	Expression
hlatmstcOLDN	⊢ ((𝐾 ∈ HL ∧ 𝑋 ∈ 𝐵) → (𝑈‘{𝑦 ∈ 𝐴 ∣ 𝑦 ≤ 𝑋}) = 𝑋)

Distinct variable groups:   𝑦,𝐴   𝑦,𝐵   𝑦, ≤   𝑦,𝑋

Allowed substitution hints:   𝑈(𝑦)   𝐾(𝑦)

Proof of Theorem hlatmstcOLDN

Step	Hyp	Ref	Expression
1		hlomcmat 40241	. 2 ⊢ (𝐾 ∈ HL → (𝐾 ∈ OML ∧ 𝐾 ∈ CLat ∧ 𝐾 ∈ AtLat))
2		hlatmstc.b	. . 3 ⊢ 𝐵 = (Base‘𝐾)
3		hlatmstc.l	. . 3 ⊢ ≤ = (le‘𝐾)
4		hlatmstc.u	. . 3 ⊢ 𝑈 = (lub‘𝐾)
5		hlatmstc.a	. . 3 ⊢ 𝐴 = (Atoms‘𝐾)
6	2, 3, 4, 5	atlatmstc 40195	. 2 ⊢ (((𝐾 ∈ OML ∧ 𝐾 ∈ CLat ∧ 𝐾 ∈ AtLat) ∧ 𝑋 ∈ 𝐵) → (𝑈‘{𝑦 ∈ 𝐴 ∣ 𝑦 ≤ 𝑋}) = 𝑋)
7	1, 6	sylan 592	1 ⊢ ((𝐾 ∈ HL ∧ 𝑋 ∈ 𝐵) → (𝑈‘{𝑦 ∈ 𝐴 ∣ 𝑦 ≤ 𝑋}) = 𝑋)

This proof depends on syntax axioms:   → wi 4   ∧ wa 401   ∧ w3a 1103   = wceq 1570   ∈ wcel 2145  {crab 3412   class class class wbr 5103  ‘cfv 6533  Basecbs 17304  lecple 17352  lubclub 18400  CLatccla 18589  OMLcoml 40051  Atomscatm 40139  AtLatcal 40140  HLchlt 40226

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 5232  ax-sep 5251  ax-nul 5263  ax-pow 5330  ax-pr 5398  ax-un 7737

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 3740  df-csb 3848  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-pw 4559  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-iun 4953  df-br 5104  df-opab 5168  df-mpt 5187  df-id 5550  df-xp 5661  df-rel 5662  df-cnv 5663  df-co 5664  df-dm 5665  df-rn 5666  df-res 5667  df-ima 5668  df-iota 6489  df-fun 6535  df-fn 6536  df-f 6537  df-f1 6538  df-fo 6539  df-f1o 6540  df-fv 6541  df-riota 7371  df-ov 7417  df-oprab 7418  df-proset 18385  df-poset 18404  df-plt 18419  df-lub 18435  df-glb 18436  df-join 18437  df-meet 18438  df-p0 18514  df-lat 18523  df-clat 18590  df-oposet 40052  df-ol 40054  df-oml 40055  df-covers 40142  df-ats 40143  df-atl 40174  df-cvlat 40198  df-hlat 40227

This theorem is used by: (None)