Last Updated
：2025/12/07
Alexander horned sphere
Noun
Japanese Meaning
位相幾何学における病的な対象で、トーラスの様々な変形を経て得られる、三次元ユークリッド空間内への球面の特殊な埋め込みを指す。
（ plural ）
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(topology) A pathological object, a certain embedding of a sphere in three-dimensional Euclidean space, obtained by various modifications of a torus.
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Alexander horned sphere
The topology seminar studied the Alexander horned sphere as a classic example of a wild embedding of a sphere in three-dimensional Euclidean space.
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The topology seminar studied the Alexander horned sphere as a classic example of a wild embedding of a sphere in three-dimensional Euclidean space.
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