![MathType on Twitter: "The Hairy Ball theorem or Hedgehog theorem proven by Poincaré in the 19th century states that "you can't comb a hairy ball flat without creating a cowlick". A hairy MathType on Twitter: "The Hairy Ball theorem or Hedgehog theorem proven by Poincaré in the 19th century states that "you can't comb a hairy ball flat without creating a cowlick". A hairy](https://pbs.twimg.com/media/EBdCHWCWwAU3QOj.jpg)
MathType on Twitter: "The Hairy Ball theorem or Hedgehog theorem proven by Poincaré in the 19th century states that "you can't comb a hairy ball flat without creating a cowlick". A hairy
![Hanne Oberman on Twitter: "For those wondering, it is in fact "Hairy ball theorem" https://t.co/zTdkAc4shE https://t.co/B7hULIevgR" / Twitter Hanne Oberman on Twitter: "For those wondering, it is in fact "Hairy ball theorem" https://t.co/zTdkAc4shE https://t.co/B7hULIevgR" / Twitter](https://pbs.twimg.com/media/E4erUmTXMAE36BN.jpg)
Hanne Oberman on Twitter: "For those wondering, it is in fact "Hairy ball theorem" https://t.co/zTdkAc4shE https://t.co/B7hULIevgR" / Twitter
The "hairy ball theorem". (a) Vector fields smoothly "combed" on a 2... | Download Scientific Diagram
IAPS - International Association of Physics Students - Alt text: Text around a drawing of Earth as a globe with a marker denoting zero velocity at a point on Earth. A hedgehog
![Any attempt to comb a hairy ball flat creates at least a singular point... | Download Scientific Diagram Any attempt to comb a hairy ball flat creates at least a singular point... | Download Scientific Diagram](https://www.researchgate.net/publication/361481322/figure/fig1/AS:1170001457356802@1655961493837/Any-attempt-to-comb-a-hairy-ball-flat-creates-at-least-a-singular-point-where-the-vector.png)