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Theorem u3lemnonb 659
Description: Lemma for Kalmbach implication study.
Assertion
Ref Expression
u3lemnonb ((a ->3 b)_|_ v b_|_) = ((a v b_|_) ^ (a_|_ v b_|_))

Proof of Theorem u3lemnonb
StepHypRef Expression
1 u3lemab 594 . . . 4 ((a ->3 b) ^ b) = ((a ^ b) v (a_|_ ^ b))
2 ax-a2 30 . . . . 5 ((a ^ b) v (a_|_ ^ b)) = ((a_|_ ^ b) v (a ^ b))
3 anor2 81 . . . . . 6 (a_|_ ^ b) = (a v b_|_)_|_
4 df-a 39 . . . . . 6 (a ^ b) = (a_|_ v b_|_)_|_
53, 42or 67 . . . . 5 ((a_|_ ^ b) v (a ^ b)) = ((a v b_|_)_|_ v (a_|_ v b_|_)_|_)
62, 5ax-r2 35 . . . 4 ((a ^ b) v (a_|_ ^ b)) = ((a v b_|_)_|_ v (a_|_ v b_|_)_|_)
71, 6ax-r2 35 . . 3 ((a ->3 b) ^ b) = ((a v b_|_)_|_ v (a_|_ v b_|_)_|_)
8 df-a 39 . . 3 ((a ->3 b) ^ b) = ((a ->3 b)_|_ v b_|_)_|_
9 oran3 85 . . 3 ((a v b_|_)_|_ v (a_|_ v b_|_)_|_) = ((a v b_|_) ^ (a_|_ v b_|_))_|_
107, 8, 93tr2 61 . 2 ((a ->3 b)_|_ v b_|_)_|_ = ((a v b_|_) ^ (a_|_ v b_|_))_|_
1110con1 63 1 ((a ->3 b)_|_ v b_|_) = ((a v b_|_) ^ (a_|_ v b_|_))
Colors of variables: term
Syntax hints:   = wb 1  _|_wn 4   v wo 6   ^ wa 7   ->3 wi3 15
This theorem was proved from axioms:  ax-a1 29  ax-a2 30  ax-a3 31  ax-a4 32  ax-a5 33  ax-r1 34  ax-r2 35  ax-r4 36  ax-r5 37  ax-r3 421
This theorem depends on definitions:  df-b 38  df-a 39  df-t 40  df-f 41  df-i3 45  df-le1 122  df-le2 123  df-c1 124  df-c2 125
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