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@jemoka / Jemoka Knowledge Base / wiki/concepts/natural_numbers.md
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--- title: "natural number" type: concept related: [Group, Inverses, Natural Numbers, Identity, Adding] source: https://www.jemoka.com/posts/kbhnatural_numbers/ confidence: high status: active --- natural numbers (\(\mathbb{N}\)) are the counting numbers: 1,2,3,4…. Zero is not part of it; this produces interesting results like set of natural number under addition is not a group because there is no identity (tbh nor inverse (inverse of 1 is -1 which is not in the set.))