Willmore Surfaces of Revolution.
Surfaces of revolution in ${\mathbb S}^3$ are those invariant under the action of a 1-parameter
subgroup that fixes a geodesic. Under stereographic projection from an appropriate point
they project to surfaces of revolution in ${\mathbb R}^3$, as in the first three images
shown here. The surfaces here are all stereographic projections of Willmore
surfaces of revolution in the 3-sphere, and therefore they are also Willmore surfaces in
${\mathbb R}^3$. The first image is (an inversion of) a catenoid. The others are conformally
congruent to minimal surfaces in ${\mathbb H}^3$.
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