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Theorem oagen1b 995
Description: "Generalized" OA.
Hypotheses
Ref Expression
oagen1b.1 d ≤ (a2 b)
oagen1b.2 e ≤ ((bc) →0 ((a2 b) ∩ (a2 c)))
Assertion
Ref Expression
oagen1b (d ∩ (e ∪ ((a2 b) ∩ (a2 c)))) = (d ∩ (a2 c))

Proof of Theorem oagen1b
StepHypRef Expression
1 oagen1b.2 . . . 4 e ≤ ((bc) →0 ((a2 b) ∩ (a2 c)))
21oagen1 994 . . 3 ((a2 b) ∩ (e ∪ ((a2 b) ∩ (a2 c)))) = ((a2 b) ∩ (a2 c))
32lan 70 . 2 (d ∩ ((a2 b) ∩ (e ∪ ((a2 b) ∩ (a2 c))))) = (d ∩ ((a2 b) ∩ (a2 c)))
4 anass 69 . . . 4 ((d ∩ (a2 b)) ∩ (e ∪ ((a2 b) ∩ (a2 c)))) = (d ∩ ((a2 b) ∩ (e ∪ ((a2 b) ∩ (a2 c)))))
54ax-r1 34 . . 3 (d ∩ ((a2 b) ∩ (e ∪ ((a2 b) ∩ (a2 c))))) = ((d ∩ (a2 b)) ∩ (e ∪ ((a2 b) ∩ (a2 c))))
6 oagen1b.1 . . . . 5 d ≤ (a2 b)
76df2le2 128 . . . 4 (d ∩ (a2 b)) = d
87ran 71 . . 3 ((d ∩ (a2 b)) ∩ (e ∪ ((a2 b) ∩ (a2 c)))) = (d ∩ (e ∪ ((a2 b) ∩ (a2 c))))
95, 8ax-r2 35 . 2 (d ∩ ((a2 b) ∩ (e ∪ ((a2 b) ∩ (a2 c))))) = (d ∩ (e ∪ ((a2 b) ∩ (a2 c))))
10 anass 69 . . . 4 ((d ∩ (a2 b)) ∩ (a2 c)) = (d ∩ ((a2 b) ∩ (a2 c)))
1110ax-r1 34 . . 3 (d ∩ ((a2 b) ∩ (a2 c))) = ((d ∩ (a2 b)) ∩ (a2 c))
127ran 71 . . 3 ((d ∩ (a2 b)) ∩ (a2 c)) = (d ∩ (a2 c))
1311, 12ax-r2 35 . 2 (d ∩ ((a2 b) ∩ (a2 c))) = (d ∩ (a2 c))
143, 9, 133tr2 61 1 (d ∩ (e ∪ ((a2 b) ∩ (a2 c)))) = (d ∩ (a2 c))
Colors of variables: term
Syntax hints:   = wb 1   ≤ wle 2   ∪ wo 6   ∩ wa 7   →0 wi0 12   →2 wi2 14
This theorem is referenced by:  oadistd 1003
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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