Syntax Definition cnpi 9666

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. The last lemma of the construction is mulcnsrec 9965. The actual set of Dedekind cuts is defined by df-np 9803.

Assertion

Ref	Expression
cnpi	class N

See definition df-ni 9694 for more information.