27 Oct
2018
27 Oct
'18
7:28 a.m.
Why not start at the north pole, go south to equator, east on equator for 90 degrees, then north back to north pole. What am I missing?? On Sat, Oct 27, 2018 at 8:05 AM Bill Gosper <billgosper@gmail.com> wrote:
(__agramma is neuter?) I just learned of this. Choose a point on a 2-sphere and traverse 90º of a great circle. Hang a 90º left turn. Traverse another 90º arc. Turn. Iterate. When, if ever, do you return to your starting point? —rwg _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun