Hairy ball theorem - Wikipedia - Hairy donuts
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1. Salmon trap, bearded clam, taco, bloody hatchet wound. 2. Kind of leathery and hairy to boot. See also: leather donut, turd cutter. The hairy ball theorem of algebraic topology states that there is no nonvanishing continuous A hairy doughnut (2-torus), on the other hand, is quite easily combable. A continuous tangent vector field on a 2-sphere with only one pole, in this.