蜗牛线

蜗牛线（）是一種蜗牛形的曲線，類似環索線，其极坐标系方程如下：

其笛卡儿坐标系方程如下

其參數方程如下

蜗牛线是的Heinrich Wieleitner: Spezielle Ebene Kurven. Göschen, Leipzig, 1908, pp. 256-259 (German)。
腳註

參考資料

Cochleoid in the Encyclopedia of Mathematics
Liliana Luca, Iulian Popescu: A Special Spiral: The Cochleoid. Fiabilitate si Durabilitate - Fiability & Durability no 1(7)/ 2011, Editura "Academica Brâncuşi", Târgu Jiu, 
Roscoe Woods: The Cochlioid. The American Mathematical Monthly, Vol. 31, No. 5 (May, 1924), pp. 222–227 (JSTOR)
 Howard Eves: A Graphometer. The Mathematics Teacher, Vol. 41, No. 7 (November 1948), pp. 311–313 (JSTOR)
 外部連結 

cochleoid at 2dcurves.com


Category:曲線