# hedgehog

> plane curve given by the envelope of a family of lines determined by a support function

**Wikidata**: [Q104868325](https://www.wikidata.org/wiki/Q104868325)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Hedgehog_(geometry))  
**Source**: https://4ort.xyz/entity/hedgehog-q104868325