単たん連れん結けつ

noun which may take the genitive case particle 'no'

simply-connected

Topological term: a space is simply-connected if it is path-connected and every loop can be continuously shrunk to a point. Used in mathematics, especially in algebraic topology.

• 球きゅう面めんは単たん連れん結けつだが、トーラスは単たん連れん結けつではない。

  A sphere is simply-connected, but a torus is not.

• 単たん連れん結けつな空くう間かんでは、任にん意いの閉へい曲きょく線せんが連れん続ぞく的てきに一いっ点てんに縮ちぢめられる。

  In a simply-connected space, any closed curve can be continuously shrunk to a point.