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Theorem nom64 341
Description: Part of Lemma 3.3(15) from "Non-Orthomodular Models..." paper. (Contributed by NM, 7-Feb-1999.)
Assertion
Ref Expression
nom64 (b4 (ab)) = (a2 b)

Proof of Theorem nom64
StepHypRef Expression
1 nomb41 299 . 2 (b4 (ab)) = ((ab) ≡1 b)
2 nom51 332 . 2 ((ab) ≡1 b) = (a2 b)
31, 2ax-r2 36 1 (b4 (ab)) = (a2 b)
Colors of variables: term
Syntax hints:   = wb 1  wo 6  2 wi2 13  1 wid1 18  4 wid4 21
This theorem was proved from axioms:  ax-a1 30  ax-a2 31  ax-a3 32  ax-a5 34  ax-r1 35  ax-r2 36  ax-r4 37  ax-r5 38
This theorem depends on definitions:  df-a 40  df-t 41  df-f 42  df-i1 44  df-i2 45  df-id1 50  df-id2 51  df-id4 53  df-le1 130  df-le2 131
This theorem is referenced by: (None)
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