Riemann xi function

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Notion

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Science and technology

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What Wikipedia says

In mathematics, the Riemann xi function is a variant of the Riemann zeta function, and is defined so as to have a particularly simple functional equation. The function is named in honour of Bernhard Riemann.

Excerpt from the Wikipedia article “Riemann xi function”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Jan Homann, Public domain, via Wikimedia Commons.