30 Mar
2012
30 Mar
'12
1:32 a.m.
So far, two messages (one directed only to me) have questioned whether this puzzle actually has a valid solution. It does. --Dan << In the torus T^2, find an embedded theta curve C (i.e., 2 points joined by each of 3 otherwise disjoint arcs) such that if C is identified to a point, the quotient space is topologically a sphere S^2.
________________________________________________________________________________________ It goes without saying that .