Theorem opococ 40010

Description: Double negative law for orthoposets. (ococ 31795 analog.) (Contributed by NM, 13-Sep-2011.)

Hypotheses

Ref	Expression
opoccl.b	⊢ 𝐵 = (Base‘𝐾)
opoccl.o	⊢ ⊥ = (oc‘𝐾)

Assertion

Ref	Expression
opococ	⊢ ((𝐾 ∈ OP ∧ 𝑋 ∈ 𝐵) → ( ⊥ ‘( ⊥ ‘𝑋)) = 𝑋)

Proof of Theorem opococ

Step	Hyp	Ref	Expression
1		opoccl.b	. . . . 5 ⊢ 𝐵 = (Base‘𝐾)
2		eqid 2766	. . . . 5 ⊢ (le‘𝐾) = (le‘𝐾)
3		opoccl.o	. . . . 5 ⊢ ⊥ = (oc‘𝐾)
4		eqid 2766	. . . . 5 ⊢ (join‘𝐾) = (join‘𝐾)
5		eqid 2766	. . . . 5 ⊢ (meet‘𝐾) = (meet‘𝐾)
6		eqid 2766	. . . . 5 ⊢ (0.‘𝐾) = (0.‘𝐾)
7		eqid 2766	. . . . 5 ⊢ (1.‘𝐾) = (1.‘𝐾)
8	1, 2, 3, 4, 5, 6, 7	oposlem 39997	. . . 4 ⊢ ((𝐾 ∈ OP ∧ 𝑋 ∈ 𝐵 ∧ 𝑋 ∈ 𝐵) → ((( ⊥ ‘𝑋) ∈ 𝐵 ∧ ( ⊥ ‘( ⊥ ‘𝑋)) = 𝑋 ∧ (𝑋(le‘𝐾)𝑋 → ( ⊥ ‘𝑋)(le‘𝐾)( ⊥ ‘𝑋))) ∧ (𝑋(join‘𝐾)( ⊥ ‘𝑋)) = (1.‘𝐾) ∧ (𝑋(meet‘𝐾)( ⊥ ‘𝑋)) = (0.‘𝐾)))
9	8	3anidm23 1448	. . 3 ⊢ ((𝐾 ∈ OP ∧ 𝑋 ∈ 𝐵) → ((( ⊥ ‘𝑋) ∈ 𝐵 ∧ ( ⊥ ‘( ⊥ ‘𝑋)) = 𝑋 ∧ (𝑋(le‘𝐾)𝑋 → ( ⊥ ‘𝑋)(le‘𝐾)( ⊥ ‘𝑋))) ∧ (𝑋(join‘𝐾)( ⊥ ‘𝑋)) = (1.‘𝐾) ∧ (𝑋(meet‘𝐾)( ⊥ ‘𝑋)) = (0.‘𝐾)))
10	9	simp1d 1160	. 2 ⊢ ((𝐾 ∈ OP ∧ 𝑋 ∈ 𝐵) → (( ⊥ ‘𝑋) ∈ 𝐵 ∧ ( ⊥ ‘( ⊥ ‘𝑋)) = 𝑋 ∧ (𝑋(le‘𝐾)𝑋 → ( ⊥ ‘𝑋)(le‘𝐾)( ⊥ ‘𝑋))))
11	10	simp2d 1161	1 ⊢ ((𝐾 ∈ OP ∧ 𝑋 ∈ 𝐵) → ( ⊥ ‘( ⊥ ‘𝑋)) = 𝑋)

This proof depends on syntax axioms:   → wi 4   ∧ wa 401   ∧ w3a 1103   = wceq 1570   ∈ wcel 2146   class class class wbr 5114  ‘cfv 6543  (class class class)co 7423  Basecbs 17294  lecple 17342  occoc 17343  joincjn 18392  meetcmee 18393  0.cp0 18502  1.cp1 18503  OPcops 39987

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 2148  ax-9 2156  ax-ext 2738  ax-nul 5274

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-sb 2100  df-clab 2745  df-cleq 2758  df-clel 2841  df-ne 2962  df-ral 3083  df-rab 3420  df-v 3460  df-dif 3911  df-un 3913  df-ss 3925  df-nul 4290  df-if 4493  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4878  df-br 5115  df-dm 5676  df-iota 6499  df-fv 6551  df-ov 7426  df-oposet 39991

This theorem is used by:  opcon3b  40011  opcon2b  40012  oplecon3b  40015  oplecon1b  40016  opltcon1b  40020  opltcon2b  40021  oldmm2  40033  oldmm3N  40034  oldmm4  40035  oldmj1  40036  oldmj2  40037  oldmj3  40038  oldmj4  40039  olm11  40042  omllaw4  40061  cmt2N  40065  glbconN  40192  1cvratex  40288  1cvrjat  40290  polval2N  40721  2polpmapN  40728  2polvalN  40729  2polatN  40747  lhpoc2N  40830  doch2val2  42179  dochocss  42181  dochoc  42182