# Mean curvature self-shrinkers of high genus: Non-compact examples

Mean curvature self-shrinkers of high genus: Non-compact examples AbstractWe give the first rigorous construction of complete, embedded self-shrinking hypersurfaces under mean curvature flow, since Angenent’s torus in 1989. The surfaces exist for any sufficiently large prescribed genus g, and are non-compact with one end. Each has 4⁢g+4{4g+4}symmetries and comes from desingularizing the intersection of the plane and sphere through a great circle, a configuration with very high symmetry.Each is at infinity asymptotic to the cone in ℝ3{\mathbb{R}^{3}}over a 2⁢π/(g+1){2\pi/(g+1)}-periodic graph on an equator of the unit sphere 𝕊2⊆ℝ3{\mathbb{S}^{2}\subseteq\mathbb{R}^{3}}, with the shape of a periodically “wobbling sheet”. This is a dramatic instability phenomenon, with changes of asymptotics that break much more symmetry than seen in minimal surface constructions.The core of the proof is a detailed understanding of the linearized problem in a setting with severely unbounded geometry, leading to special PDEs of Ornstein–Uhlenbeck type with fast growth on coefficients of the gradient terms. This involves identifying new, adequate weighted Hölder spaces of asymptotically conical functions in which the operators invert, via a Liouville-type result with precise asymptotics. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal für die reine und angewandte Mathematik de Gruyter

# Mean curvature self-shrinkers of high genus: Non-compact examples

, Volume 2018 (739): 39 – Jun 1, 2018
39 pages

/lp/degruyter/mean-curvature-self-shrinkers-of-high-genus-non-compact-examples-1RFbdmL1qO
Publisher
de Gruyter
© 2018 Walter de Gruyter GmbH, Berlin/Boston
ISSN
1435-5345
eISSN
1435-5345
D.O.I.
10.1515/crelle-2015-0050
Publisher site
See Article on Publisher Site

### Abstract

AbstractWe give the first rigorous construction of complete, embedded self-shrinking hypersurfaces under mean curvature flow, since Angenent’s torus in 1989. The surfaces exist for any sufficiently large prescribed genus g, and are non-compact with one end. Each has 4⁢g+4{4g+4}symmetries and comes from desingularizing the intersection of the plane and sphere through a great circle, a configuration with very high symmetry.Each is at infinity asymptotic to the cone in ℝ3{\mathbb{R}^{3}}over a 2⁢π/(g+1){2\pi/(g+1)}-periodic graph on an equator of the unit sphere 𝕊2⊆ℝ3{\mathbb{S}^{2}\subseteq\mathbb{R}^{3}}, with the shape of a periodically “wobbling sheet”. This is a dramatic instability phenomenon, with changes of asymptotics that break much more symmetry than seen in minimal surface constructions.The core of the proof is a detailed understanding of the linearized problem in a setting with severely unbounded geometry, leading to special PDEs of Ornstein–Uhlenbeck type with fast growth on coefficients of the gradient terms. This involves identifying new, adequate weighted Hölder spaces of asymptotically conical functions in which the operators invert, via a Liouville-type result with precise asymptotics.

### Journal

Journal für die reine und angewandte Mathematikde Gruyter

Published: Jun 1, 2018

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