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Theorem i3ri3 538
Description: WQL (Weak Quantum Logic) rule. (Contributed by NM, 7-Nov-1997.)
Hypotheses
Ref Expression
i3ri3.1 (a3 b) = 1
i3ri3.2 (b3 a) = 1
Assertion
Ref Expression
i3ri3 ((a3 c) →3 (b3 c)) = 1

Proof of Theorem i3ri3
StepHypRef Expression
1 i3ri3.1 . . . . . 6 (a3 b) = 1
21i3le 515 . . . . 5 ab
3 i3ri3.2 . . . . . 6 (b3 a) = 1
43i3le 515 . . . . 5 ba
52, 4lebi 145 . . . 4 a = b
65ri3 253 . . 3 (a3 c) = (b3 c)
76bile 142 . 2 (a3 c) ≤ (b3 c)
87lei3 246 1 ((a3 c) →3 (b3 c)) = 1
Colors of variables: term
Syntax hints:   = wb 1  1wt 8  3 wi3 14
This theorem was proved from axioms:  ax-a1 30  ax-a2 31  ax-a3 32  ax-a4 33  ax-a5 34  ax-r1 35  ax-r2 36  ax-r4 37  ax-r5 38  ax-r3 439
This theorem depends on definitions:  df-b 39  df-a 40  df-t 41  df-f 42  df-i3 46  df-le1 130  df-le2 131  df-c1 132  df-c2 133
This theorem is referenced by: (None)
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