Difference between revisions 107880291 and 107880292 on dewiki

[[Image:Alexander horned sphere.png|thumb|300px|right|Alexander horned sphere]]

The '''Alexander horned sphere''' is a wild embedding of a sphere into space, discovered  by {{harvs|txt|authorlink=James Waddell Alexander II|first=J. W. |last=Alexander|year=1924}}. It is the particular [[embedding (topology)|embedding]] of a [[sphere]] in 3-dimensional [[Euclidean space]] obtained by the following construction, starting with a [[standard torus]]:
(contracted; show full)*[http://www.ultrafractal.com/showcase/jos/alexanders-horn.html rotating animation]
*[http://pouet.net/prod.php?which=30253 PC OpenGL demo rendering and expanding the cusp]

[[Category:Geometric topology]]
[[Category:Topology]]
[[Category:Fractals]]

[[ca:Esfera bany
auda d'Alexander]]
[[es:Esfera cornuda de Alexander]]
[[fr:Sphère cornue d'Alexander]]
[[ko:알렉산더의 뿔 달린 구]]
[[it:Sfera di Alexander]]
[[pl:Rogata sfera Alexandera]]
[[ru:Дикая сфера]]