27 Oct
2018
27 Oct
'18
12:10 p.m.
GACK—As Rudy Rucker points out, this is just a 90-90-90 spherical triangle! Stay tuned for a correction. —rwg On Sat, Oct 27, 2018 at 6:04 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