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Theorem nom42 327
Description: Part of Lemma 3.3(15) from "Non-Orthomodular Models..." paper. (Contributed by NM, 7-Feb-1999.)
Assertion
Ref Expression
nom42 ((ab) →2 b) = (a2 b)

Proof of Theorem nom42
StepHypRef Expression
1 ancom 74 . . . . . 6 (ba ) = (ab )
2 anor3 90 . . . . . 6 (ab ) = (ab)
31, 2ax-r2 36 . . . . 5 (ba ) = (ab)
43ud1lem0a 255 . . . 4 (b1 (ba )) = (b1 (ab) )
54ax-r1 35 . . 3 (b1 (ab) ) = (b1 (ba ))
6 nom11 308 . . 3 (b1 (ba )) = (b1 a )
75, 6ax-r2 36 . 2 (b1 (ab) ) = (b1 a )
8 i2i1 267 . 2 ((ab) →2 b) = (b1 (ab) )
9 i2i1 267 . 2 (a2 b) = (b1 a )
107, 8, 93tr1 63 1 ((ab) →2 b) = (a2 b)
Colors of variables: term
Syntax hints:   = wb 1   wn 4  wo 6  wa 7  1 wi1 12  2 wi2 13
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
This theorem is referenced by: (None)
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