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Theorem oadist 999
Description: Distributive law derived from OAL.
Hypothesis
Ref Expression
oadist.1 d ≤ ((bc) →0 ((a2 b) ∩ (a2 c)))
Assertion
Ref Expression
oadist ((a2 b) ∩ (d ∪ ((a2 b) ∩ (a2 c)))) = (((a2 b) ∩ d) ∪ ((a2 b) ∩ ((a2 b) ∩ (a2 c))))

Proof of Theorem oadist
StepHypRef Expression
1 oadist.1 . . . . 5 d ≤ ((bc) →0 ((a2 b) ∩ (a2 c)))
21oagen1 994 . . . 4 ((a2 b) ∩ (d ∪ ((a2 b) ∩ (a2 c)))) = ((a2 b) ∩ (a2 c))
32bile 134 . . 3 ((a2 b) ∩ (d ∪ ((a2 b) ∩ (a2 c)))) ≤ ((a2 b) ∩ (a2 c))
4 anidm 103 . . . . . . 7 ((a2 b) ∩ (a2 b)) = (a2 b)
54ax-r1 34 . . . . . 6 (a2 b) = ((a2 b) ∩ (a2 b))
65ran 71 . . . . 5 ((a2 b) ∩ (a2 c)) = (((a2 b) ∩ (a2 b)) ∩ (a2 c))
7 anass 69 . . . . 5 (((a2 b) ∩ (a2 b)) ∩ (a2 c)) = ((a2 b) ∩ ((a2 b) ∩ (a2 c)))
86, 7ax-r2 35 . . . 4 ((a2 b) ∩ (a2 c)) = ((a2 b) ∩ ((a2 b) ∩ (a2 c)))
9 leor 151 . . . 4 ((a2 b) ∩ ((a2 b) ∩ (a2 c))) ≤ (((a2 b) ∩ d) ∪ ((a2 b) ∩ ((a2 b) ∩ (a2 c))))
108, 9bltr 130 . . 3 ((a2 b) ∩ (a2 c)) ≤ (((a2 b) ∩ d) ∪ ((a2 b) ∩ ((a2 b) ∩ (a2 c))))
113, 10letr 129 . 2 ((a2 b) ∩ (d ∪ ((a2 b) ∩ (a2 c)))) ≤ (((a2 b) ∩ d) ∪ ((a2 b) ∩ ((a2 b) ∩ (a2 c))))
12 ledi 166 . 2 (((a2 b) ∩ d) ∪ ((a2 b) ∩ ((a2 b) ∩ (a2 c)))) ≤ ((a2 b) ∩ (d ∪ ((a2 b) ∩ (a2 c))))
1311, 12lebi 137 1 ((a2 b) ∩ (d ∪ ((a2 b) ∩ (a2 c)))) = (((a2 b) ∩ d) ∪ ((a2 b) ∩ ((a2 b) ∩ (a2 c))))
Colors of variables: term
Syntax hints:   = wb 1   ≤ wle 2   ∪ wo 6   ∩ wa 7   →0 wi0 12   →2 wi2 14
This theorem was proved from axioms:  ax-a1 29  ax-a2 30  ax-a3 31  ax-a5 33  ax-r1 34  ax-r2 35  ax-r4 36  ax-r5 37  ax-3oa 978
This theorem depends on definitions:  df-a 39  df-t 40  df-f 41  df-i0 42  df-i1 43  df-i2 44  df-le1 122  df-le2 123
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