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| Mirrors > Home > QLE Home > Th. List > ax-a1 | GIF version | ||
| Description: Axiom for ortholattices. (Contributed by NM, 9-Aug-1997.) |
| Ref | Expression |
|---|---|
| ax-a1 | a = a⊥ ⊥ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | wva | . 2 term a | |
| 2 | 1 | wn 4 | . . 3 term a⊥ |
| 3 | 2 | wn 4 | . 2 term a⊥ ⊥ |
| 4 | 1, 3 | wb 1 | 1 wff a = a⊥ ⊥ |
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