Cartesian oval

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

In geometry, a Cartesian oval is a plane curve consisting of points that have the same linear combination of distances from two fixed points (foci). These curves are named after French mathematician René Descartes, who used them in optics.

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

Image: HB, CC BY-SA 4.0, via Wikimedia Commons.