Re: [math-fun] left vs. right

="James Propp" <jpropp@cs.uml.edu> I wonder if other math-funsters have my peculiar sort of trouble with using maps

I don't know if it's the same, but I too have trouble with rotations. The moon jumps around the sky if I don't keep an eye on it when I make turns. To generate driving directions, I visualize a little car on the map, and then pretend I'm in it. Nowadays with GPS I just "fly on instruments". However even in my imagination I've never dared sailing in the fog on the surface of an ATM card with negative curvature...