November 2003
![Unfolding a catenoid](/issue27/features/mathart/article/anim/catenoidUnfold_animTiny.gif)
The catenoid is a minimal surface with "too much" negative curvature. Therefore, the unfolding consists of more than one planar component.
The catenoid is a minimal surface with "too much" negative curvature. Therefore, the unfolding consists of more than one planar component.