Alexander horned sphere

短语

词形变化

Alexander horned spheres 复数 Alexander horned spheres

释义与例句

n.
  1. 1.

    A pathological object, a certain embedding of a sphere in three-dimensional Euclidean space, obtained by various modifications of a torus.

    数学

词源

Discovered by J. W. Alexander (1924).

来源：wiktionary