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Theorem oadistb 1000
Description: Distributive law derived from OAL.
Hypotheses
Ref Expression
oadistb.2 d ≤ (a2 b)
oadistb.1 e ≤ ((bc) →0 ((a2 b) ∩ (a2 c)))
Assertion
Ref Expression
oadistb (d ∩ (e ∪ ((a2 b) ∩ (a2 c)))) = ((de) ∪ (d ∩ ((a2 b) ∩ (a2 c))))

Proof of Theorem oadistb
StepHypRef Expression
1 oadistb.2 . . . . . . 7 d ≤ (a2 b)
21df2le2 128 . . . . . 6 (d ∩ (a2 b)) = d
32ran 71 . . . . 5 ((d ∩ (a2 b)) ∩ (e ∪ ((a2 b) ∩ (a2 c)))) = (d ∩ (e ∪ ((a2 b) ∩ (a2 c))))
43ax-r1 34 . . . 4 (d ∩ (e ∪ ((a2 b) ∩ (a2 c)))) = ((d ∩ (a2 b)) ∩ (e ∪ ((a2 b) ∩ (a2 c))))
5 anass 69 . . . . 5 ((d ∩ (a2 b)) ∩ (e ∪ ((a2 b) ∩ (a2 c)))) = (d ∩ ((a2 b) ∩ (e ∪ ((a2 b) ∩ (a2 c)))))
6 oadistb.1 . . . . . . 7 e ≤ ((bc) →0 ((a2 b) ∩ (a2 c)))
76oagen1 994 . . . . . 6 ((a2 b) ∩ (e ∪ ((a2 b) ∩ (a2 c)))) = ((a2 b) ∩ (a2 c))
87lan 70 . . . . 5 (d ∩ ((a2 b) ∩ (e ∪ ((a2 b) ∩ (a2 c))))) = (d ∩ ((a2 b) ∩ (a2 c)))
95, 8ax-r2 35 . . . 4 ((d ∩ (a2 b)) ∩ (e ∪ ((a2 b) ∩ (a2 c)))) = (d ∩ ((a2 b) ∩ (a2 c)))
104, 9ax-r2 35 . . 3 (d ∩ (e ∪ ((a2 b) ∩ (a2 c)))) = (d ∩ ((a2 b) ∩ (a2 c)))
11 leor 151 . . 3 (d ∩ ((a2 b) ∩ (a2 c))) ≤ ((de) ∪ (d ∩ ((a2 b) ∩ (a2 c))))
1210, 11bltr 130 . 2 (d ∩ (e ∪ ((a2 b) ∩ (a2 c)))) ≤ ((de) ∪ (d ∩ ((a2 b) ∩ (a2 c))))
13 ledi 166 . 2 ((de) ∪ (d ∩ ((a2 b) ∩ (a2 c)))) ≤ (d ∩ (e ∪ ((a2 b) ∩ (a2 c))))
1412, 13lebi 137 1 (d ∩ (e ∪ ((a2 b) ∩ (a2 c)))) = ((de) ∪ (d ∩ ((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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