hairy ball theorem
English
Proper noun
A demonstration of the hairy ball theorem by a failed attempt to comb a hairy ball flat.
- (mathematics) A theorem stating that there is no nonvanishing continuous tangent vector field on the sphere; colloquially, that "you can't comb a hairy ball flat without creating a cowlick".
Translations
theorem of algebraic topology
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See also
vector fields on spheres on Wikipedia.Wikipedia
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