Discrete group

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Science and technology

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What Wikipedia says

In mathematics, a topological group G is called a discrete group if there is no limit point in it (i.e., for each element in G, there is a neighborhood which only contains that element). Equivalently, the group G is discrete if and only if its identity is isolated.

Excerpt from the Wikipedia article “Discrete group”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Original: Jakob.scholbach Vector: Pbroks13, CC BY-SA 3.0, via Wikimedia Commons.