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Mirrors > Home > LLPE Home > Th. List > df-one | Structured version |
Description: One is the dual of Bottom. |
Ref | Expression |
---|---|
df-one | ⊦ (1 ⧟ ~ ⊥) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | wone 103 | . 2 wff 1 | |
2 | wbot 1 | . . 3 wff ⊥ | |
3 | 2 | wneg 3 | . 2 wff ~ ⊥ |
4 | 1, 3 | wlb 55 | 1 wff (1 ⧟ ~ ⊥) |
Colors of variables: wff var nilad |
This definition is referenced by: (None) |
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