The Alexander horned sphere is a pathological object in topology discovered by J. W. Alexander (1924). It is a particular topological embedding of a ...

Alexander's horned sphere has an uncountable infinity of wild points, which are the limits of the sequences of the horned sphere's branch points (roughly, the " ...

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Опубликовано: 12 апр. 2010 г.

Alexander's horned sphere is an example of a convoluted, intertwined surface for which it is difficult to define an inside and outside.

2 дек. 2015 г. · The Alexander Horned sphere is supposedly a topological space which is homeomorphic to a two-dimensional sphere.

11 июл. 2022 г. · The purpose of Alexander horned sphere is to provide an explicit example of such a surface, where the answer is no. ELI5: what is Alexander's Horned Sphere? : r/explainlikeimfive ELI5: How is Alexander's Horned Sphere a sphere? - Reddit Другие результаты с сайта www.reddit.com

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

29 июн. 2022 г. · The notion revolves around the idea that you start off with a stretchy rubber-like sphere that you can stretch and bend and squeeze any way you like.

Here we explore part of the wild world: its inhabitants are knots that are infinitely knotted, spheres that try to hug themselves, colorful earrings, ...