アステロイド (曲線)
1. AstroidAn astroid (sometimes spelled astroide) is a particular mathematical curve: a hypocycloid with four cusps. Astroids are also superellipses: all astroids are scaled versions of the curve specified by the equation Its modern name comes from the Greek word for "star". The curve had a variety of names, including tetracuspid (still used), cubocycloid, and paracycle. It is nearly identical in form to the evolute of an ellipse.
Read “Astroid” on English Wikipedia
Read “アステロイド (曲線)” on Japanese Wikipedia
Read “Astroid” on DBpedia
Read “Astroid” on English Wikipedia
Read “アステロイド (曲線)” on Japanese Wikipedia
Read “Astroid” on DBpedia
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