Alexander horned sphere

From Wiktionary, the free dictionary
Jump to navigation Jump to search

English[edit]

English Wikipedia has an article on:
Wikipedia
Alexander horned sphere

Etymology[edit]

Discovered by J. W. Alexander (1924).

Noun[edit]

Alexander horned sphere (plural Alexander horned spheres)

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

Related terms[edit]

Retrieved from "https://en.wiktionary.org/w/index.php?title=Alexander_horned_sphere&oldid=71193283"