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| Mirrors > Home > ILE Home > Th. List > cnpi | GIF version | ||
| Description: The set of positive
integers, which is the set of natural numbers ω
     with 0 removed.
 Note: This is the start of the Dedekind-cut construction of real and complex numbers.  | 
| Ref | Expression | 
|---|---|
| cnpi | class N | 
| Colors of variables: wff set class | 
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