Connections Workshop: New Frontiers in Curvature & Special Geometric Structures and Analysis: Riemannian and Kahler flying wing steady Ricci solitons
Presenter
August 21, 2024
Keywords:
- Riemannian geometry
- curvature
- geometric flow
- special holonomy
- Minimal surface
- general relativity
- K¨ahler geometry
MSC:
- 32-XX - Several complex variables and analytic spaces {For infinite-\newline dimensional holomorphy
- see also 46G20
- 58B12}
- 53-XX - Differential geometry {For differential topology
- see 57Rxx
- for foundational questions of differentiable manifolds
- see 58Axx}
- 58-XX - Global analysis
- analysis on manifolds [See also 32Cxx
- 32Fxx
- 32Wxx
- 46-XX
- 53Cxx] {For nonlinear operators
- see 47Hxx
- for geometric integration theory
- see 49Q15}
- 83-XX - Relativity and gravitational theory
Abstract
Steady Ricci solitons are fundamental objects in the study of Ricci flow, as they are self-similar solutions and often arise as singularity models. Classical examples of steady solitons are the most symmetric ones, such as the 2D cigar soliton, the O(n)-invariant Bryantsolitons, and Cao’s U(n)-invariant Kahler steady solitons. Recently we constructed a family of flying wing steady solitons in any real dimension n≥3, which confirmed a conjecture by Hamilton in n=3. In dimension 3, we showed all steady gradient solitons are O(2)-symmetric. In the Kahler case, we also construct a family of Kahler flying wing steady gradient solitons with positive curvature for any complex dimension n≥2. This answers a conjecture by H.-D.Cao in the negative. This is partly collaborated with Pak-Yeung Chan and Ronan Conlon.