Closed surfaces with bounds on their Willmore energy

Details Closed surfaces with bounds on their Willmore energy Closed surfaces with bounds on their Willmore energy

2010-09-27

arxiv.org/abs/1009.5286v1

Mathematics

Differential Geometry

Scientific paper

The Willmore energy of a closed surface in R^n is the integral of its squared mean curvature, and is invariant uner M\"obius transformations of R^n. We show that any torus in R^3 with energy at most $8 \pi-delta$ has a representative under the M\"obius action, for which the induced metric and a conformal metric of constant (zero) curvature are uniformly equivalent, with constants depending only on $delta>0$. An analogous estimate is also obtained for surfaces of fixed genus $p \geq 1$ in R^3 or R^4, assuming suitable energy bounds which are sharp for n=3. Moreover the conformal type is controlled in terms of the energy bounds.

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