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| Mirrors > Home > NFE Home > Th. List > cdif | GIF version | ||
| Description: Extend class notation to include class difference (read: "A minus B"). |
| Ref | Expression |
|---|---|
| cA | class A |
| cB | class B |
| Ref | Expression |
|---|---|
| cdif | class (A ∖ B) |
| Colors of variables: wff setvar class |
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