On 23 Jan 2019, Karl wrote: One of our visting professor Richard Pates gave me the attached paper which indicates that there may be a good idea to reconsider the Nyquist contour so that it works in the multivariable case, the example from Roy is new to me. Let us ponder it for a while.
Karl also felt that “it may be a good idea to replace (conjugate points) by (antipodal points) antipodal leads you directly to think about spheres. Let us ponder this a while too.”
In the note from Richard Pates, he wrote that “the formula you have is right for
antipodal points on the Riemann sphere too: