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Theorem oposlem 34787
Description: Lemma for orthoposet properties. (Contributed by NM, 20-Oct-2011.)
Hypotheses
Ref Expression
oposlem.b 𝐵 = (Base‘𝐾)
oposlem.l = (le‘𝐾)
oposlem.o = (oc‘𝐾)
oposlem.j = (join‘𝐾)
oposlem.m = (meet‘𝐾)
oposlem.f 0 = (0.‘𝐾)
oposlem.u 1 = (1.‘𝐾)
Assertion
Ref Expression
oposlem ((𝐾 ∈ OP ∧ 𝑋𝐵𝑌𝐵) → ((( 𝑋) ∈ 𝐵 ∧ ( ‘( 𝑋)) = 𝑋 ∧ (𝑋 𝑌 → ( 𝑌) ( 𝑋))) ∧ (𝑋 ( 𝑋)) = 1 ∧ (𝑋 ( 𝑋)) = 0 ))

Proof of Theorem oposlem
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 oposlem.b . . . . 5 𝐵 = (Base‘𝐾)
2 eqid 2651 . . . . 5 (lub‘𝐾) = (lub‘𝐾)
3 eqid 2651 . . . . 5 (glb‘𝐾) = (glb‘𝐾)
4 oposlem.l . . . . 5 = (le‘𝐾)
5 oposlem.o . . . . 5 = (oc‘𝐾)
6 oposlem.j . . . . 5 = (join‘𝐾)
7 oposlem.m . . . . 5 = (meet‘𝐾)
8 oposlem.f . . . . 5 0 = (0.‘𝐾)
9 oposlem.u . . . . 5 1 = (1.‘𝐾)
101, 2, 3, 4, 5, 6, 7, 8, 9isopos 34785 . . . 4 (𝐾 ∈ OP ↔ ((𝐾 ∈ Poset ∧ 𝐵 ∈ dom (lub‘𝐾) ∧ 𝐵 ∈ dom (glb‘𝐾)) ∧ ∀𝑥𝐵𝑦𝐵 ((( 𝑥) ∈ 𝐵 ∧ ( ‘( 𝑥)) = 𝑥 ∧ (𝑥 𝑦 → ( 𝑦) ( 𝑥))) ∧ (𝑥 ( 𝑥)) = 1 ∧ (𝑥 ( 𝑥)) = 0 )))
1110simprbi 479 . . 3 (𝐾 ∈ OP → ∀𝑥𝐵𝑦𝐵 ((( 𝑥) ∈ 𝐵 ∧ ( ‘( 𝑥)) = 𝑥 ∧ (𝑥 𝑦 → ( 𝑦) ( 𝑥))) ∧ (𝑥 ( 𝑥)) = 1 ∧ (𝑥 ( 𝑥)) = 0 ))
12 fveq2 6229 . . . . . . 7 (𝑥 = 𝑋 → ( 𝑥) = ( 𝑋))
1312eleq1d 2715 . . . . . 6 (𝑥 = 𝑋 → (( 𝑥) ∈ 𝐵 ↔ ( 𝑋) ∈ 𝐵))
1412fveq2d 6233 . . . . . . 7 (𝑥 = 𝑋 → ( ‘( 𝑥)) = ( ‘( 𝑋)))
15 id 22 . . . . . . 7 (𝑥 = 𝑋𝑥 = 𝑋)
1614, 15eqeq12d 2666 . . . . . 6 (𝑥 = 𝑋 → (( ‘( 𝑥)) = 𝑥 ↔ ( ‘( 𝑋)) = 𝑋))
17 breq1 4688 . . . . . . 7 (𝑥 = 𝑋 → (𝑥 𝑦𝑋 𝑦))
1812breq2d 4697 . . . . . . 7 (𝑥 = 𝑋 → (( 𝑦) ( 𝑥) ↔ ( 𝑦) ( 𝑋)))
1917, 18imbi12d 333 . . . . . 6 (𝑥 = 𝑋 → ((𝑥 𝑦 → ( 𝑦) ( 𝑥)) ↔ (𝑋 𝑦 → ( 𝑦) ( 𝑋))))
2013, 16, 193anbi123d 1439 . . . . 5 (𝑥 = 𝑋 → ((( 𝑥) ∈ 𝐵 ∧ ( ‘( 𝑥)) = 𝑥 ∧ (𝑥 𝑦 → ( 𝑦) ( 𝑥))) ↔ (( 𝑋) ∈ 𝐵 ∧ ( ‘( 𝑋)) = 𝑋 ∧ (𝑋 𝑦 → ( 𝑦) ( 𝑋)))))
2115, 12oveq12d 6708 . . . . . 6 (𝑥 = 𝑋 → (𝑥 ( 𝑥)) = (𝑋 ( 𝑋)))
2221eqeq1d 2653 . . . . 5 (𝑥 = 𝑋 → ((𝑥 ( 𝑥)) = 1 ↔ (𝑋 ( 𝑋)) = 1 ))
2315, 12oveq12d 6708 . . . . . 6 (𝑥 = 𝑋 → (𝑥 ( 𝑥)) = (𝑋 ( 𝑋)))
2423eqeq1d 2653 . . . . 5 (𝑥 = 𝑋 → ((𝑥 ( 𝑥)) = 0 ↔ (𝑋 ( 𝑋)) = 0 ))
2520, 22, 243anbi123d 1439 . . . 4 (𝑥 = 𝑋 → (((( 𝑥) ∈ 𝐵 ∧ ( ‘( 𝑥)) = 𝑥 ∧ (𝑥 𝑦 → ( 𝑦) ( 𝑥))) ∧ (𝑥 ( 𝑥)) = 1 ∧ (𝑥 ( 𝑥)) = 0 ) ↔ ((( 𝑋) ∈ 𝐵 ∧ ( ‘( 𝑋)) = 𝑋 ∧ (𝑋 𝑦 → ( 𝑦) ( 𝑋))) ∧ (𝑋 ( 𝑋)) = 1 ∧ (𝑋 ( 𝑋)) = 0 )))
26 breq2 4689 . . . . . . 7 (𝑦 = 𝑌 → (𝑋 𝑦𝑋 𝑌))
27 fveq2 6229 . . . . . . . 8 (𝑦 = 𝑌 → ( 𝑦) = ( 𝑌))
2827breq1d 4695 . . . . . . 7 (𝑦 = 𝑌 → (( 𝑦) ( 𝑋) ↔ ( 𝑌) ( 𝑋)))
2926, 28imbi12d 333 . . . . . 6 (𝑦 = 𝑌 → ((𝑋 𝑦 → ( 𝑦) ( 𝑋)) ↔ (𝑋 𝑌 → ( 𝑌) ( 𝑋))))
30293anbi3d 1445 . . . . 5 (𝑦 = 𝑌 → ((( 𝑋) ∈ 𝐵 ∧ ( ‘( 𝑋)) = 𝑋 ∧ (𝑋 𝑦 → ( 𝑦) ( 𝑋))) ↔ (( 𝑋) ∈ 𝐵 ∧ ( ‘( 𝑋)) = 𝑋 ∧ (𝑋 𝑌 → ( 𝑌) ( 𝑋)))))
31303anbi1d 1443 . . . 4 (𝑦 = 𝑌 → (((( 𝑋) ∈ 𝐵 ∧ ( ‘( 𝑋)) = 𝑋 ∧ (𝑋 𝑦 → ( 𝑦) ( 𝑋))) ∧ (𝑋 ( 𝑋)) = 1 ∧ (𝑋 ( 𝑋)) = 0 ) ↔ ((( 𝑋) ∈ 𝐵 ∧ ( ‘( 𝑋)) = 𝑋 ∧ (𝑋 𝑌 → ( 𝑌) ( 𝑋))) ∧ (𝑋 ( 𝑋)) = 1 ∧ (𝑋 ( 𝑋)) = 0 )))
3225, 31rspc2v 3353 . . 3 ((𝑋𝐵𝑌𝐵) → (∀𝑥𝐵𝑦𝐵 ((( 𝑥) ∈ 𝐵 ∧ ( ‘( 𝑥)) = 𝑥 ∧ (𝑥 𝑦 → ( 𝑦) ( 𝑥))) ∧ (𝑥 ( 𝑥)) = 1 ∧ (𝑥 ( 𝑥)) = 0 ) → ((( 𝑋) ∈ 𝐵 ∧ ( ‘( 𝑋)) = 𝑋 ∧ (𝑋 𝑌 → ( 𝑌) ( 𝑋))) ∧ (𝑋 ( 𝑋)) = 1 ∧ (𝑋 ( 𝑋)) = 0 )))
3311, 32mpan9 485 . 2 ((𝐾 ∈ OP ∧ (𝑋𝐵𝑌𝐵)) → ((( 𝑋) ∈ 𝐵 ∧ ( ‘( 𝑋)) = 𝑋 ∧ (𝑋 𝑌 → ( 𝑌) ( 𝑋))) ∧ (𝑋 ( 𝑋)) = 1 ∧ (𝑋 ( 𝑋)) = 0 ))
34333impb 1279 1 ((𝐾 ∈ OP ∧ 𝑋𝐵𝑌𝐵) → ((( 𝑋) ∈ 𝐵 ∧ ( ‘( 𝑋)) = 𝑋 ∧ (𝑋 𝑌 → ( 𝑌) ( 𝑋))) ∧ (𝑋 ( 𝑋)) = 1 ∧ (𝑋 ( 𝑋)) = 0 ))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 383  w3a 1054   = wceq 1523  wcel 2030  wral 2941   class class class wbr 4685  dom cdm 5143  cfv 5926  (class class class)co 6690  Basecbs 15904  lecple 15995  occoc 15996  Posetcpo 16987  lubclub 16989  glbcglb 16990  joincjn 16991  meetcmee 16992  0.cp0 17084  1.cp1 17085  OPcops 34777
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-nul 4822
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ral 2946  df-rex 2947  df-rab 2950  df-v 3233  df-sbc 3469  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-nul 3949  df-if 4120  df-sn 4211  df-pr 4213  df-op 4217  df-uni 4469  df-br 4686  df-dm 5153  df-iota 5889  df-fv 5934  df-ov 6693  df-oposet 34781
This theorem is referenced by:  opoccl  34799  opococ  34800  oplecon3  34804  opexmid  34812  opnoncon  34813
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