Theorem opococ 39783

Description: Double negative law for orthoposets. (ococ 31555 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 2761	. . . . 5 ⊢ (le‘𝐾) = (le‘𝐾)
3		opoccl.o	. . . . 5 ⊢ ⊥ = (oc‘𝐾)
4		eqid 2761	. . . . 5 ⊢ (join‘𝐾) = (join‘𝐾)
5		eqid 2761	. . . . 5 ⊢ (meet‘𝐾) = (meet‘𝐾)
6		eqid 2761	. . . . 5 ⊢ (0.‘𝐾) = (0.‘𝐾)
7		eqid 2761	. . . . 5 ⊢ (1.‘𝐾) = (1.‘𝐾)
8	1, 2, 3, 4, 5, 6, 7	oposlem 39770	. . . 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 1439	. . 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 1154	. 2 ⊢ ((𝐾 ∈ OP ∧ 𝑋 ∈ 𝐵) → (( ⊥ ‘𝑋) ∈ 𝐵 ∧ ( ⊥ ‘( ⊥ ‘𝑋)) = 𝑋 ∧ (𝑋(le‘𝐾)𝑋 → ( ⊥ ‘𝑋)(le‘𝐾)( ⊥ ‘𝑋))))
11	10	simp2d 1155	1 ⊢ ((𝐾 ∈ OP ∧ 𝑋 ∈ 𝐵) → ( ⊥ ‘( ⊥ ‘𝑋)) = 𝑋)

Syntax hints:   → wi 4   ∧ wa 399   ∧ w3a 1097   = wceq 1559   ∈ wcel 2141   class class class wbr 5099  ‘cfv 6517  (class class class)co 7392  Basecbs 17228  lecple 17276  occoc 17277  joincjn 18326  meetcmee 18327  0.cp0 18436  1.cp1 18437  OPcops 39760

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1814  ax-4 1828  ax-5 1929  ax-6 1986  ax-7 2027  ax-8 2143  ax-9 2151  ax-ext 2733  ax-nul 5255

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1099  df-tru 1562  df-fal 1572  df-ex 1799  df-sb 2090  df-clab 2740  df-cleq 2753  df-clel 2836  df-ne 2957  df-ral 3076  df-rab 3414  df-v 3455  df-dif 3907  df-un 3909  df-ss 3921  df-nul 4286  df-if 4480  df-sn 4582  df-pr 4584  df-op 4588  df-uni 4865  df-br 5100  df-dm 5655  df-iota 6473  df-fv 6525  df-ov 7395  df-oposet 39764

This theorem is referenced by:  opcon3b  39784  opcon2b  39785  oplecon3b  39788  oplecon1b  39789  opltcon1b  39793  opltcon2b  39794  oldmm2  39806  oldmm3N  39807  oldmm4  39808  oldmj1  39809  oldmj2  39810  oldmj3  39811  oldmj4  39812  olm11  39815  omllaw4  39834  cmt2N  39838  glbconN  39965  1cvratex  40061  1cvrjat  40063  polval2N  40494  2polpmapN  40501  2polvalN  40502  2polatN  40520  lhpoc2N  40603  doch2val2  41952  dochocss  41954  dochoc  41955