and it doesn't go on forever. Instead it comes back around to where you started. We can only imagine this in terms of acircle, which is why this kind of geometry is also called "elliptical," i.e. in that a circle is a kind of ellipse -- the class ofconic sectionsthat areclosed...
A. Kelner. Spectral partitioning, eigenvalue bounds, and circle pack- ings for graphs of bounded genus. SIAM Journal on Computing., 35(4):882–902, Apr. 2006. [197] J. A. Kelner, Y. T. Lee, L. Orecchia, and A. Sidford. An almost-linear- time algorithm for approximate max flow...