3 ms·
I am confused how we can define a rotation number of the map from S^1 to R^3 defined at the end of the second paragraph. R^3 is nullhomotopic, after all...
by daynthelife 1y ago
I am confused how we can define a rotation number of the map from S^1 to R^3 defined at the end of the second paragraph. R^3 is nullhomotopic, after all...
- ajkjk 1y agoI think the idea is that you can't, but we're assuming v doesn't vanish at that point which would imply that it's possible?