Helmholtz equation

Rarity: Uncommon

A topic a little better known than average, read and translated beyond its own country.

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Notion

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Science and technology

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What Wikipedia says

In mathematics, the Helmholtz equation is the eigenvalue problem for the Laplace operator. It corresponds to the elliptic partial differential equation:

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

Image: Oleg Alexandrov, Public domain, via Wikimedia Commons.