Theorem omllaw3 40568

Description: Orthomodular law equivalent. Theorem 2(ii) of [Kalmbach] p. 22. (pjoml 32095 analog.) (Contributed by NM, 19-Oct-2011.)

Hypotheses

Ref	Expression
omllaw3.b	⊢ 𝐵 = (Base‘𝐾)
omllaw3.l	⊢ ≤ = (le‘𝐾)
omllaw3.m	⊢ ∧ = (meet‘𝐾)
omllaw3.o	⊢ ⊥ = (oc‘𝐾)
omllaw3.z	⊢ 0 = (0.‘𝐾)

Assertion

Ref	Expression
omllaw3	⊢ ((𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑋 ≤ 𝑌 ∧ (𝑌 ∧ ( ⊥ ‘𝑋)) = 0 ) → 𝑋 = 𝑌))

Proof of Theorem omllaw3

Step	Hyp	Ref	Expression
1		oveq2 7459	. . . . . 6 ⊢ ((𝑌 ∧ ( ⊥ ‘𝑋)) = 0 → (𝑋(join‘𝐾)(𝑌 ∧ ( ⊥ ‘𝑋))) = (𝑋(join‘𝐾) 0 ))
2	1	adantl 487	. . . . 5 ⊢ (((𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (𝑌 ∧ ( ⊥ ‘𝑋)) = 0 ) → (𝑋(join‘𝐾)(𝑌 ∧ ( ⊥ ‘𝑋))) = (𝑋(join‘𝐾) 0 ))
3		omlol 40563	. . . . . . . 8 ⊢ (𝐾 ∈ OML → 𝐾 ∈ OL)
4		omllaw3.b	. . . . . . . . 9 ⊢ 𝐵 = (Base‘𝐾)
5		eqid 2763	. . . . . . . . 9 ⊢ (join‘𝐾) = (join‘𝐾)
6		omllaw3.z	. . . . . . . . 9 ⊢ 0 = (0.‘𝐾)
7	4, 5, 6	olj01 40548	. . . . . . . 8 ⊢ ((𝐾 ∈ OL ∧ 𝑋 ∈ 𝐵) → (𝑋(join‘𝐾) 0 ) = 𝑋)
8	3, 7	sylan 592	. . . . . . 7 ⊢ ((𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵) → (𝑋(join‘𝐾) 0 ) = 𝑋)
9	8	3adant3 1150	. . . . . 6 ⊢ ((𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋(join‘𝐾) 0 ) = 𝑋)
10	9	adantr 486	. . . . 5 ⊢ (((𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (𝑌 ∧ ( ⊥ ‘𝑋)) = 0 ) → (𝑋(join‘𝐾) 0 ) = 𝑋)
11	2, 10	eqtr2d 2799	. . . 4 ⊢ (((𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (𝑌 ∧ ( ⊥ ‘𝑋)) = 0 ) → 𝑋 = (𝑋(join‘𝐾)(𝑌 ∧ ( ⊥ ‘𝑋))))
12	11	adantrl 729	. . 3 ⊢ (((𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (𝑋 ≤ 𝑌 ∧ (𝑌 ∧ ( ⊥ ‘𝑋)) = 0 )) → 𝑋 = (𝑋(join‘𝐾)(𝑌 ∧ ( ⊥ ‘𝑋))))
13		omllaw3.l	. . . . . 6 ⊢ ≤ = (le‘𝐾)
14		omllaw3.m	. . . . . 6 ⊢ ∧ = (meet‘𝐾)
15		omllaw3.o	. . . . . 6 ⊢ ⊥ = (oc‘𝐾)
16	4, 13, 5, 14, 15	omllaw 40566	. . . . 5 ⊢ ((𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ≤ 𝑌 → 𝑌 = (𝑋(join‘𝐾)(𝑌 ∧ ( ⊥ ‘𝑋)))))
17	16	imp 412	. . . 4 ⊢ (((𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ 𝑋 ≤ 𝑌) → 𝑌 = (𝑋(join‘𝐾)(𝑌 ∧ ( ⊥ ‘𝑋))))
18	17	adantrr 730	. . 3 ⊢ (((𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (𝑋 ≤ 𝑌 ∧ (𝑌 ∧ ( ⊥ ‘𝑋)) = 0 )) → 𝑌 = (𝑋(join‘𝐾)(𝑌 ∧ ( ⊥ ‘𝑋))))
19	12, 18	eqtr4d 2801	. 2 ⊢ (((𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (𝑋 ≤ 𝑌 ∧ (𝑌 ∧ ( ⊥ ‘𝑋)) = 0 )) → 𝑋 = 𝑌)
20	19	ex 418	1 ⊢ ((𝐾 ∈ OML ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑋 ≤ 𝑌 ∧ (𝑌 ∧ ( ⊥ ‘𝑋)) = 0 ) → 𝑋 = 𝑌))

This proof depends on syntax axioms:   → wi 4   ∧ wa 401   ∧ w3a 1103   = wceq 1570   ∈ wcel 2147   class class class wbr 5108  ‘cfv 6566  (class class class)co 7451  Basecbs 17431  lecple 17479  occoc 17480  joincjn 18535  meetcmee 18536  0.cp0 18645  OLcol 40497  OMLcoml 40498

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 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-10 2180  ax-11 2197  ax-12 2216  ax-ext 2735  ax-rep 5238  ax-sep 5255  ax-nul 5266  ax-pow 5334  ax-pr 5398  ax-un 7783

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 2102  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2839  df-nfc 2913  df-ne 2960  df-ral 3081  df-rex 3091  df-rmo 3369  df-reu 3370  df-rab 3417  df-v 3456  df-sbc 3743  df-csb 3852  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-pw 4562  df-sn 4589  df-pr 4591  df-op 4841  df-uni 4873  df-iun 4958  df-br 5109  df-opab 5174  df-mpt 5193  df-id 5553  df-xp 5664  df-rel 5665  df-cnv 5666  df-co 5667  df-dm 5668  df-rn 5669  df-res 5670  df-ima 5671  df-iota 6520  df-fun 6568  df-fn 6569  df-f 6570  df-f1 6571  df-fo 6572  df-f1o 6573  df-fv 6574  df-riota 7408  df-ov 7454  df-oprab 7455  df-proset 18518  df-poset 18537  df-lub 18568  df-glb 18569  df-join 18570  df-meet 18571  df-p0 18647  df-lat 18656  df-oposet 40499  df-ol 40501  df-oml 40502

This theorem is used by:  omlfh1N  40581  atlatmstc  40642