A structure named for this mathematician is the fibre bundle over the one sphere.
A structure named for this mathematician is the fibre bundle over the one sphere. His namesake function returns either -1, 0, or 1 depending on the prime factorization of its input.  His namesake transformation of the complex plane is given by the function (*) az plus b divided by cz plus d, where a, b, c, and d are all complex numbers. His namesake surface can be formed by cutting a Klein bottle in half and has an Euler characteristic of zero. For 10 points, name this mathematician who names a nonorientable, one-sided surface, his namesake "strip."
A structure named for this mathematician is the fibre bundle over the one sphere.
August Möbius