1. The Smale Conjecture and Minimal Legendrian Graph in $\mathbb{S}^{2}\times \mathbb{S}^{3}$
- Author
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Chang, Shu-Cheng, Wu, Chin-Tung, and Zhang, Liuyang
- Subjects
Mathematics - Differential Geometry ,53C44, 53C56 - Abstract
In this article, we recapture the Smale conjecture on a Sasakian $3$-sphere via the Legendrian mean curvature flow. More precisely,~we deform the area-preserving contactomorphism (symplectomorphism) of Sasakian $3$-spheres to an isometry via the Legendrian mean curvature flow on the Legendrian graph in $\mathbb{S}^{2}\times \mathbb{S}^{3}$. By using the monotonicity formula and blow-up analysis, we obtain the minimal Legendrian graph in $\mathbb{S}^{2}\times \mathbb{S}^{3}$. Finally, we will address the rigidity theorem of $2$-dimensional Legendrian self-shrinkers in $\mathbb{R}^{5}$. We are able to reconstruct the Harvey-Lawson special Lagrangian cone in $\mathbb{C}^{3}$ from this Legendrian self-shrinker. The partial classification is also provided if the squared norm of the second fundamental form is constant.
- Published
- 2023