Principal curvature

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Notion

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Science and technology

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What Wikipedia says

In differential geometry, the two principal curvatures at a given point of a surface are the maximum and minimum values of the curvature as expressed by the eigenvalues of the shape operator at that point. They measure how the surface bends by different amounts in different directions at that point.

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

Image: Eric Gaba (Sting), CC BY-SA 3.0, via Wikimedia Commons.