How involved have you gotten with Hairy Balls?
How involved have you gotten with Hairy Balls?
Easiest answer:
Roughly stated, it’s the reason you can’t multiply two vectors in the plane. The result wouldn’t “behave” right.
Easiest answer: [Hairy Ball Theorem](https://en.wikipedia.org/wiki/Hairy_ball_theorem)
Roughly stated, it’s the reason you can’t multiply two vectors in the plane. The result wouldn’t “behave” right.
You can't brush the hair of a coconut (without a cowlick). But you can on a doughnut.
Interesting.
You can't brush the hair of a coconut (without a cowlick). But you can on a doughnut.
Interesting.
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