Closed curve

...Curves may intersect along the way. A curve whose start point and end point coincide is called a closed curve. Two closed curves are said to be homotopes of each other when they can be transformed into each other continuously. ...

*Some of the terminology that refers to "closed curve" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…曲線は途中で交わっていてもよい。始点と終点が一致する曲線を閉曲線closed curveという。二つの閉曲線は互いに連続的に変形しうるときに，互いにホモトープであるという。…

※「closed curve」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報