Cusp

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

In collections

Nobody has pulled it yet.

What Wikipedia says

In mathematics, a cusp, sometimes called spinode in old texts, is a point on a curve where a moving point must reverse direction. A typical example is given in the figure. A cusp is thus a type of singular point of a curve.

Excerpt from the Wikipedia article “Cusp (singularity)”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Fulvio314, CC0, via Wikimedia Commons.