Videos

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.