Nonpositive Integer
An integer that is either 0 or negative, i.e., a member of the set {0} union Z^-, where Z-- denotes the negative integers.
See also
Negative Integer, Nonnegative Integer, Nonpositive Matrix, Positive Integer, Z--Explore with Wolfram|Alpha
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Cite this as:
Weisstein, Eric W. "Nonpositive Integer." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/NonpositiveInteger.html