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Theorem 2vwomr1a 363
Description: 2-variable WOML rule. (Contributed by NM, 13-Nov-1998.)
Hypothesis
Ref Expression
2vwomr1a.1 (a1 b) = 1
Assertion
Ref Expression
2vwomr1a (a2 b) = 1

Proof of Theorem 2vwomr1a
StepHypRef Expression
1 df-i2 45 . 2 (a2 b) = (b ∪ (ab ))
2 df-i1 44 . . . . 5 (a1 b) = (a ∪ (ab))
32ax-r1 35 . . . 4 (a ∪ (ab)) = (a1 b)
4 2vwomr1a.1 . . . 4 (a1 b) = 1
53, 4ax-r2 36 . . 3 (a ∪ (ab)) = 1
65ax-wom 361 . 2 (b ∪ (ab )) = 1
71, 6ax-r2 36 1 (a2 b) = 1
Colors of variables: term
Syntax hints:   = wb 1   wn 4  wo 6  wa 7  1wt 8  1 wi1 12  2 wi2 13
This theorem was proved from axioms:  ax-r1 35  ax-r2 36  ax-wom 361
This theorem depends on definitions:  df-i1 44  df-i2 45
This theorem is referenced by:  wr5-2v  366  lem3.4.3  1076  lem3.4.5  1078
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