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| Mirrors > Home > QLE Home > Th. List > anor3 | GIF version | ||
| Description: Conjunction expressed with disjunction. (Contributed by NM, 15-Dec-1997.) |
| Ref | Expression |
|---|---|
| anor3 | (a⊥ ∩ b⊥ ) = (a ∪ b)⊥ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | oran 87 | . . 3 (a ∪ b) = (a⊥ ∩ b⊥ )⊥ | |
| 2 | 1 | ax-r1 35 | . 2 (a⊥ ∩ b⊥ )⊥ = (a ∪ b) |
| 3 | 2 | con3 68 | 1 (a⊥ ∩ b⊥ ) = (a ∪ b)⊥ |
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