The hairy ball theorem of algebraic topology states that there is no non-vanishing continuous tangent vector field on the sphere. This is famously stated as “you can’t comb a hairy ball flat without creating a cowlick.” (via Chuck)
And I suppose that is all there is to say about that.
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quoted made me happy. such complicated things, described so simply.
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O, but how I shall keep trying.
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to say about that.
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