Alexander horned sphere

English

Discovered by J. W. Alexander (1924).

Alexander horned sphere (plural Alexander horned spheres)

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

单词	Alexander horned sphere
释义	Alexander horned sphere English Alexander horned sphere Etymology Discovered by J. W. Alexander (1924). Noun Alexander horned sphere (plural Alexander horned spheres) (topology) A pathological object, a certain embedding of a sphere in three-dimensional Euclidean space, obtained by various modifications of a torus. Related terms Alexander horned ball
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