## A Conversation for The Hairy Ball Theorem

### Two special points?

toybox Started conversation Sep 14, 2006

Why will there be two special points and not just one?

For instance, take a plane and some constant vector field, then fold the plane into a punctured sphere and extend the vector field to the whole sphere by 0 on the puncture. Why doesn't this construction work?

### Two special points?

Gnomon - time to move on Posted Sep 14, 2006

Good question. I can't see anything wrong with what you've said, so I'll see can I find where I read that there will be two "nodes".

### Two special points?

Gnomon - time to move on Posted Jul 16, 2007

You're right. I've removed the reference to the second point.

Sorry it took me so long to get around to this.

G

### Two special points?

toybox Posted Jul 16, 2007

Oops, and the Front Page calls it 'Hairy Ball Theorum'. While it is a perfectly acceptable pun in French, I strongly suspect a typo here.

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