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Theorem 3dimlem1 36654
 Description: Lemma for 3dim1 36663. (Contributed by NM, 25-Jul-2012.)
Hypotheses
Ref Expression
3dim0.j = (join‘𝐾)
3dim0.l = (le‘𝐾)
3dim0.a 𝐴 = (Atoms‘𝐾)
Assertion
Ref Expression
3dimlem1 (((𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅) ∧ ¬ 𝑇 ((𝑄 𝑅) 𝑆)) ∧ 𝑃 = 𝑄) → (𝑃𝑅 ∧ ¬ 𝑆 (𝑃 𝑅) ∧ ¬ 𝑇 ((𝑃 𝑅) 𝑆)))

Proof of Theorem 3dimlem1
StepHypRef Expression
1 neeq1 3075 . . 3 (𝑃 = 𝑄 → (𝑃𝑅𝑄𝑅))
2 oveq1 7145 . . . . 5 (𝑃 = 𝑄 → (𝑃 𝑅) = (𝑄 𝑅))
32breq2d 5059 . . . 4 (𝑃 = 𝑄 → (𝑆 (𝑃 𝑅) ↔ 𝑆 (𝑄 𝑅)))
43notbid 321 . . 3 (𝑃 = 𝑄 → (¬ 𝑆 (𝑃 𝑅) ↔ ¬ 𝑆 (𝑄 𝑅)))
52oveq1d 7153 . . . . 5 (𝑃 = 𝑄 → ((𝑃 𝑅) 𝑆) = ((𝑄 𝑅) 𝑆))
65breq2d 5059 . . . 4 (𝑃 = 𝑄 → (𝑇 ((𝑃 𝑅) 𝑆) ↔ 𝑇 ((𝑄 𝑅) 𝑆)))
76notbid 321 . . 3 (𝑃 = 𝑄 → (¬ 𝑇 ((𝑃 𝑅) 𝑆) ↔ ¬ 𝑇 ((𝑄 𝑅) 𝑆)))
81, 4, 73anbi123d 1433 . 2 (𝑃 = 𝑄 → ((𝑃𝑅 ∧ ¬ 𝑆 (𝑃 𝑅) ∧ ¬ 𝑇 ((𝑃 𝑅) 𝑆)) ↔ (𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅) ∧ ¬ 𝑇 ((𝑄 𝑅) 𝑆))))
98biimparc 483 1 (((𝑄𝑅 ∧ ¬ 𝑆 (𝑄 𝑅) ∧ ¬ 𝑇 ((𝑄 𝑅) 𝑆)) ∧ 𝑃 = 𝑄) → (𝑃𝑅 ∧ ¬ 𝑆 (𝑃 𝑅) ∧ ¬ 𝑇 ((𝑃 𝑅) 𝑆)))
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 399   ∧ w3a 1084   = wceq 1538   ≠ wne 3013   class class class wbr 5047  ‘cfv 6336  (class class class)co 7138  lecple 16561  joincjn 17543  Atomscatm 36459 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1971  ax-7 2016  ax-8 2117  ax-9 2125  ax-10 2146  ax-11 2162  ax-12 2179  ax-ext 2796 This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2071  df-clab 2803  df-cleq 2817  df-clel 2896  df-nfc 2964  df-ne 3014  df-rab 3141  df-v 3481  df-dif 3921  df-un 3923  df-in 3925  df-ss 3935  df-nul 4275  df-if 4449  df-sn 4549  df-pr 4551  df-op 4555  df-uni 4820  df-br 5048  df-iota 6295  df-fv 6344  df-ov 7141 This theorem is referenced by:  3dim1  36663
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